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M52 DIN960 CL12.9 Partially Threaded Machine Screws

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M52 DIN960 CL12.9 Partially Threaded Machine Screws

Name: M52 DIN960 CL12.9 Partially Threaded Machine Screws
Brand: QBH
SKU: DIN960 M4-M52
Price: 1.00 USD
Availability: InStock
Rating: 4.9 (179 reviews)

MOQ:	500KG
Price:	Negotiation
Standard Packaging:	25kg Carton+900kg/Pallet or 5KG/CTN
Delivery Period:	30days
Payment Method:	L/C, T/T,OA
Supply Capacity:	600TON/MONTH

Detail Information

Product Description

Detail Information

Place of Origin

CHINA

Brand Name

QBH

Certification

ISO9001

Model Number

DIN960 M4-M52

Material:

1008 1035 1045 40CR 42CRMO 35CRMO

SIZE:

M4-M52

LENGTH:

ALL KIND OF LENGTH

SURFACE:

ZP YZP HDG BLACK

Mechanical Capacity:

ISO898-1

PACKING:

ACCORDING CUSTOMER REQUIREMENT

DELIVERY TIME:

VERY SOON

Minimum Order Quantity:

500KG

Price:

Negotiation

Packaging Details:

25kg Carton+900kg/Pallet or 5KG/CTN

Delivery Time:

30days

Payment Terms:

L/C, T/T,OA

Supply Ability:

600TON/MONTH

High Light:

DIN960 Partially Threaded Machine Screws

M52 Partially Threaded Machine Screws

ISO 898 Half Thread Screw

Product Description

Specification

DIN 960 Hex Head Bolts are partially threaded bolts with fine and extra fine external machine screw threads (the space between fine and extra fine threads is less than coarse, wider-spaced threads). Mated with internally threaded holes and nuts, they are similar to ISO 8765 except for some dimensional differences. Available in Class 8.8 and 10.9 steel, zinc plating inhibits the formation of rust while plain finish does not have any corrosion protection. Thread tolerance for Class 8.8 and 10.9 is 6g for plain finish and 6h for plated; right-hand threads are standard. Also called hex head cap screws, the bolt diameter and bolt length determine the minimum threaded length. The bolt's length is measured from under the head to the tip. DIN 960 Hex Head Bolts are similar to ISO 8765 and JIS B1180. Use DIN 961 instead when fully threaded is required and DIN 931 for partially threaded coarse threads.

DIN 960 - Partially Threaded Hex Cap Screw (Fine Thread)

Current norm: DIN EN 28765
Equivalent norms: ISO 8765; CSN 021101; PN 82101; UNI 5738; EU 28676;

M52 DIN960 CL12.9 Partially Threaded Machine Screws 0

Legend:

l - length of bolt

Makings:QBH

Steel: 5.6,5.8,8.8,10.9,12.9
Stainless: A2,A4
Plastic: -
Non Ferrous: Brass
Thread: 6g

DIN960

Screw Thread
d

P	Pitch	Fine thread-1
		Fine thread-2
b	L≤125
	125＜L≤200
	L＞200
c	min
	max
d_a	max
d_s	max
	Grade A	min
	Grade B	min
d_w	Grade A	min
	Grade B	min
e	Grade A	min
	Grade B	min
k	Nominal Size
	Grade A	min
		max
	Grade B	min
		max
k₁	min
r	min
s	max=nominal size
	Grade A	min
	Grade B	min

1	1	1.5	1.5	1.5	2	1.5	2	2	2	2	2	3	3
-	1.25	1.25	-	-	1.5	2	1.5	1.5	-	-	-	-	-
22	26	30	34	38	42	46	50	54	60	66	72	78	84
28	32	36	40	44	48	52	56	60	66	72	78	84	90
41	45	49	53	57	61	65	69	73	79	85	91	97	103
0.15	0.15	0.15	0.15	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.3
0.6	0.6	0.6	0.6	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	1
9.2	11.2	13.7	15.7	17.7	20.2	22.4	24.4	26.4	30.4	33.4	36.4	39.4	42.4
8	10	12	14	16	18	20	22	24	27	30	33	36	39
7.78	9.78	11.73	13.73	15.73	17.73	19.67	21.67	23.67	-	-	-	-	-
7.64	9.64	11.57	13.57	15.57	17.57	19.48	21.48	23.48	26.48	29.48	32.38	35.38	38.38
11.6	15.6	17.4	20.5	22.5	25.3	28.2	30	33.6	-	-	-	-	-
11.4	15.4	17.2	20.1	22	24.8	27.7	29.5	33.2	38	42.7	46.6	51.1	55.9
14.38	18.9	21.1	24.49	26.75	30.14	33.53	35.72	39.98	-	-	-	-	-
14.2	18.72	20.88	23.91	26.17	29.56	32.95	35.03	39.55	45.2	50.85	55.37	60.79	66.44
5.3	6.4	7.5	8.8	10	11.5	12.5	14	15	17	18.7	21	22.5	25
5.15	6.22	7.32	8.62	9.82	11.28	12.28	13.78	14.78	-	-	-	-	-
5.45	6.58	7.68	8.98	10.18	11.72	12.72	14.22	15.22	-	-	-	-	-
5.06	6.11	7.21	8.51	9.71	11.15	12.15	13.65	14.65	16.65	18.28	20.58	22.08	24.58
5.54	6.69	7.79	9.09	10.29	11.85	12.85	14.35	15.35	17.35	19.12	21.42	22.92	25.42
3.54	4.28	5.05	5.96	6.8	7.8	8.5	9.6	10.3	11.7	12.8	14.4	15.5	17.2
0.4	0.4	0.6	0.6	0.6	0.6	0.8	0.8	0.8	1	1	1	1	1
13	17	19	22	24	27	30	32	36	41	46	50	55	60
12.73	16.73	18.67	21.67	23.67	26.67	29.67	31.61	35.38	-	-	-	-	-
12.57	16.57	18.48	21.16	23.16	26.16	29.16	31	35	40	45	49	53.8	58.8

Weight of per 1000 steel products(≈kg)

Length of Thread b

Screw Thread
d

P	Pitch	Fine thread-1
		Fine thread-2
b	L≤125
	125＜L≤200
	L＞200
c	min
	max
d_a	max
d_s	max
	Grade A	min
	Grade B	min
d_w	Grade A	min
	Grade B	min
e	Grade A	min
	Grade B	min
k	Nominal Size
	Grade A	min
		max
	Grade B	min
		max
k₁	min
r	min
s	max=nominal size
	Grade A	min
	Grade B	min

3	3	3	3	4	4	4	4	4	4	4	4	4
-	-	-	-	-	-	-	-	-	-	-	-	-
90	96	102	-	-	-	-	-	-	-	-	-	-
96	102	108	116	124	132	140	148	158	164	172	192	-
109	115	121	129	137	145	153	161	169	177	185	205	225
0.3	0.3	0.3	0.3	-	-	-	-	-	-	-	-	-
1	1	1	1	1	1	1	1	1	1	2	2	2
45.6	48.6	52.6	56.6	63	67	71	75	79	83	87	97	108
42	45	48	52	56	60	64	68	72	76	80	90	100
-	-	-	-	-	-	-	-	-	-	-	-	-
41.38	44.38	47.38	51.26	55.26	59.26	63.26	67.26	71.26	75.26	79.26	89.13	99.13
-	-	-	-	-	-	-	-	-	-	-	-	-
59.9	64.7	69.4	74.2	78.7	83.4	88.2	92.9	97.7	102.4	107.2	121.1	135.4
-	-	-	-	-	-	-	-	-	-	-	-	-
71.3	76.95	82.6	88.25	93.56	99.21	104.86	110.51	116.16	121.81	127.46	144.08	161.03
26	28	30	33	35	38	40	43	45	48	50	57	63
-	-	-	-	-	-	-	-	-	-	-	-	-
-	-	-	-	-	-	-	-	-	-	-	-	-
25.58	27.58	29.58	32.5	34.5	37.5	39.5	42.5	44.5	47.5	49.5	56.4	62.4
26.42	28.42	30.42	33.5	35.5	38.5	40.5	43.5	45.5	48.5	50.5	57.6	63.6
17.9	19.3	20.9	22.8	24.2	26.2	27.6	29.8	31.2	33.2	34.6	39.5	43.7
1.2	1.2	1.6	1.6	2	2	2	2	2	2	2	2.5	2.5
65	70	75	80	85	90	95	100	105	110	115	130	145
-	-	-	-	-	-	-	-	-	-	-	-	-
63.1	68.1	73.1	78.1	82.8	87.8	92.8	97.8	102.8	107.8	112.8	127.5	142.5

Weight of per 1000 steel products(≈kg)

Length of Thread b

Process flow

Cold forging

Annealing treatment(if need) ➨ wiredrawing ➨ clod forging ➨ thread rolling ➨make heat treatment(if need) ➨ Finish ➨ Packing

Hot forging

Cutting material ➨ hot forging ➨ turning ➨ shrink diameter(half thread) ➨thread rolling ➨ make heat treatment(if need) ➨ Finish ➨ Packing

Mechanical capacity

NO.	Mechanical or physical property		Property class
			4.6	4.8	5.6	5.8	6.8	8.8		9.8	10.9	12.9/12.9
			4.6	4.8	5.6	5.8	6.8	D≤16mm^a	d＞16mm^b	d≤16mm	10.9	12.9/12.9
1	Tensile strength R_m,Mpa	nom.^c	400		500		600	800		900	1000	1200
1	Tensile strength R_m,Mpa	max.	400	420	500	520	600	800	830	900	1040	1220
2	Lower yield strength R_eL,Mpa	nom.^c	240	——	300	——	——	——	——	——	——	——
2	Lower yield strength R_eL,Mpa	max.	240	——	300	——	——	——	——	——	——	——
3	Stress at 0,2 % nonproportional elongation R_p0.2,Mpa	nom.^c	——	——	——	——	——	640	640	720	900	1080
3	Stress at 0,2 % nonproportional elongation R_p0.2,Mpa	max.	——	——	——	——	——	640	660	720	940	1100
4	Stress at 0,0048 d non-proportional elongation for full-size fasteners R_p^f,Mpa	nom.^c	——	320	——	400	480	——	——	——	——	——
4		max.	——	340^e	——	420^e	480^e	——	——	——	——	——
5	Stress under proof load S_p^f,Mpa	nom.	225	310	280	380	440	580	600	650	830	970
5	Proof S_p,nom/R_{eL min} Or strength S_p,nom/R_p0.2min Or rati S_p,nom/R_{pf min}		0.94	0.91	0.93	0.9	0.92	0.91	0.91	0.9	0.88	0.88
6	Percentage elongation after fracture for machined test pieces,A,%	min.	22	——	20	——	——	12	12	10	9	8
7	Percentage reduction of area after fracture for machined test pieces,Z,%	min.	——					52		48	48	44
8	Elongation after fracture for full-size fasteners,A_f	min.	——	0.24	——	0.22	0.2	——	——	——	——	——
9	Head soundness		No fracture
10	Vickers hardness, HV, F≥98N	min.	120	130	155	160	190	250	255	290	320	385
10	Vickers hardness, HV, F≥98N	max.	220^g				250	320	335	360	380	435
11	Brinell hardness, HBW ,F=30D²	min.	114	124	147	152	181	238	242	276	304	366
11	Brinell hardness, HBW ,F=30D²	max.	209^g				238	304	318	342	361	414
12	Rockwell hardness,HRB , HRB	min.	67	71	79	82	89
	Rockwell hardness,HRB , HRB	max.	95^g				99.5
	Rockwell hardness, HRC	min.	——					22	23	28	32	39
	Rockwell hardness, HRC	max.	——					32	34	37	39	44
13	Surface hardness HV 0.3	max.	——					h			h,j	h,j
14	Height of non-decarburized thread zone,E,mm	min.	——					1/2H₁			2/3H₁	3/4H₁
14	Depth of complete decarburization in the thread,G,mm	max.	——					0.015
15	Reduction of hardness after retempering,HV	max.	——					20
16	Breaking torque, M_B,N·m	min.	——					in accordance with ISO 898-7
17	Impact strength, K_V^K,I,J	min.	——		27	——		27	27	27	27	m
18	Surface integrity in accordance with		ISO 6157-1ⁿ									ISO 6157-3
a Values do not apply for structural bolting. b For structural bolting d W M12. c Nominal values are specified only for the purpose of the designation system for property classes. See Clause 5. d In cases where the lower yield strength ReL cannot be determined, it is permissible to measure the stress at 0,2 % non-proportional elongation Rp0,2. e For the property classes 4.8, 5.8 and 6.8 the values for Rpf min are under investigation. The present values are given for calculation of the proof stress ratio only. They are not test values. f Proof loads are specified in Tables 5 and 7. g Hardness determined at the end of a fastener shall be 250 HV, 238 HB or 99,5 HRB maximum. h Surface hardness shall not be more than 30 Vickers points above the measured core hardness of the fastener when determination of both surface hardness and core hardness are carried out with HV 0,3. i Any increase in hardness at the surface which indicates that the surface hardness exceeds 390 HV is not acceptable. j Any increase in hardness at the surface which indicates that the surface hardness exceeds 435 HV is not acceptable. k Values are determined at a test temperature of −20 °C, see 9.14. l Applies to d W 16 mm. m Value for KV is under investigation. n Instead of ISO 6157-1, ISO 6157-3 may apply by agreement between the manufacturer and the purchaser.

Product Grade

Class4.8 Class5.8 Class6.8 Class8.8 Class10.9 Class12.9

Materials and Chemical compstition

1008

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Al
0.06	0.06	0.33	0.013	0.003	0.01	0	0.01	0.028

1035

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.34	0.13	0.73	0.012	0.002	0.02	0.01	0.02

10B21

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	B
0.2	0.04	0.81	0.017	0.007	0.017	0.0021

1045

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.45	0.23	0.58	0.014	0.006	0.057	0.008	0.016

40CR

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.4	0.21	0.54	0.015	0.008	0.95	0.02	0.02

35CRMO

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Mo
0.35	0.22	0.59	0.01	0.003	0.93	0.01	0.01	0.21

42CRMO

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Mo
0.42	0.27	0.92	0.013	0.004	1.01	0.03	0.04	0.2

Finish

PLAIN ZP YZP BLACK HDG DACROMET GEOMET CHROME NICKEL AND SO ON

PACKING

QBH BULK

20-25KG/CTN,36CTNS/PALLET

20-30KG/BAGS,36BAGS/PALLET

ONE TON/BOXES

50KG/ IRON DRUM,12 IRON DRUMS/PALLET

QBH SMALL PACKING

Packing in small boxes according to customer’s requirements

Packing in plastic bag according to customer’s requirements

QBH PALLET TYPE

SOLID WOOD FUMIGATION PALLET

EURO Pallet

THREE SPLINT PALLET

WOODEN BOX

The advantages of QBH

QBH brand sales to the main quality assurance.
Years of export trade management, excellent service, word-of-mouth guarantee.
By working with TUV,escort for quality.
Customization of non-standard parts can be made according to customer's requirements and drawings.
For quality customers,we can provide a certain credit period.

Product application

These Class 8.8 steel screws are suitable for fastening most machinery and equipment. Dimensions

meet ISO (formerly DIN) specifications. Length is measured from under the head.

Zinc-plated steel screws resist corrosion in wet environments. Match the thread spacing of mating

components. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the

finer the thread, the better the resistance.

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M52 DIN960 CL12.9 Partially Threaded Machine Screws

MOQ:	500KG
Price:	Negotiation
Standard Packaging:	25kg Carton+900kg/Pallet or 5KG/CTN
Delivery Period:	30days
Payment Method:	L/C, T/T,OA
Supply Capacity:	600TON/MONTH

Detail Information

Product Description

Detail Information

Place of Origin

CHINA

Brand Name

QBH

Certification

ISO9001

Model Number

DIN960 M4-M52

Material:

1008 1035 1045 40CR 42CRMO 35CRMO

SIZE:

M4-M52

LENGTH:

ALL KIND OF LENGTH

SURFACE:

ZP YZP HDG BLACK

Mechanical Capacity:

ISO898-1

PACKING:

ACCORDING CUSTOMER REQUIREMENT

DELIVERY TIME:

VERY SOON

Minimum Order Quantity:

500KG

Price:

Negotiation

Packaging Details:

25kg Carton+900kg/Pallet or 5KG/CTN

Delivery Time:

30days

Payment Terms:

L/C, T/T,OA

Supply Ability:

600TON/MONTH

High Light

DIN960 Partially Threaded Machine Screws

M52 Partially Threaded Machine Screws

ISO 898 Half Thread Screw

Product Description

Specification

DIN 960 - Partially Threaded Hex Cap Screw (Fine Thread)

Current norm: DIN EN 28765
Equivalent norms: ISO 8765; CSN 021101; PN 82101; UNI 5738; EU 28676;

M52 DIN960 CL12.9 Partially Threaded Machine Screws 0

Legend:

l - length of bolt

Makings:QBH

Steel: 5.6,5.8,8.8,10.9,12.9
Stainless: A2,A4
Plastic: -
Non Ferrous: Brass
Thread: 6g

DIN960

Screw Thread
d

P	Pitch	Fine thread-1
		Fine thread-2
b	L≤125
	125＜L≤200
	L＞200
c	min
	max
d_a	max
d_s	max
	Grade A	min
	Grade B	min
d_w	Grade A	min
	Grade B	min
e	Grade A	min
	Grade B	min
k	Nominal Size
	Grade A	min
		max
	Grade B	min
		max
k₁	min
r	min
s	max=nominal size
	Grade A	min
	Grade B	min

1	1	1.5	1.5	1.5	2	1.5	2	2	2	2	2	3	3
-	1.25	1.25	-	-	1.5	2	1.5	1.5	-	-	-	-	-
22	26	30	34	38	42	46	50	54	60	66	72	78	84
28	32	36	40	44	48	52	56	60	66	72	78	84	90
41	45	49	53	57	61	65	69	73	79	85	91	97	103
0.15	0.15	0.15	0.15	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.3
0.6	0.6	0.6	0.6	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	1
9.2	11.2	13.7	15.7	17.7	20.2	22.4	24.4	26.4	30.4	33.4	36.4	39.4	42.4
8	10	12	14	16	18	20	22	24	27	30	33	36	39
7.78	9.78	11.73	13.73	15.73	17.73	19.67	21.67	23.67	-	-	-	-	-
7.64	9.64	11.57	13.57	15.57	17.57	19.48	21.48	23.48	26.48	29.48	32.38	35.38	38.38
11.6	15.6	17.4	20.5	22.5	25.3	28.2	30	33.6	-	-	-	-	-
11.4	15.4	17.2	20.1	22	24.8	27.7	29.5	33.2	38	42.7	46.6	51.1	55.9
14.38	18.9	21.1	24.49	26.75	30.14	33.53	35.72	39.98	-	-	-	-	-
14.2	18.72	20.88	23.91	26.17	29.56	32.95	35.03	39.55	45.2	50.85	55.37	60.79	66.44
5.3	6.4	7.5	8.8	10	11.5	12.5	14	15	17	18.7	21	22.5	25
5.15	6.22	7.32	8.62	9.82	11.28	12.28	13.78	14.78	-	-	-	-	-
5.45	6.58	7.68	8.98	10.18	11.72	12.72	14.22	15.22	-	-	-	-	-
5.06	6.11	7.21	8.51	9.71	11.15	12.15	13.65	14.65	16.65	18.28	20.58	22.08	24.58
5.54	6.69	7.79	9.09	10.29	11.85	12.85	14.35	15.35	17.35	19.12	21.42	22.92	25.42
3.54	4.28	5.05	5.96	6.8	7.8	8.5	9.6	10.3	11.7	12.8	14.4	15.5	17.2
0.4	0.4	0.6	0.6	0.6	0.6	0.8	0.8	0.8	1	1	1	1	1
13	17	19	22	24	27	30	32	36	41	46	50	55	60
12.73	16.73	18.67	21.67	23.67	26.67	29.67	31.61	35.38	-	-	-	-	-
12.57	16.57	18.48	21.16	23.16	26.16	29.16	31	35	40	45	49	53.8	58.8

Weight of per 1000 steel products(≈kg)

Length of Thread b

Screw Thread
d

P	Pitch	Fine thread-1
		Fine thread-2
b	L≤125
	125＜L≤200
	L＞200
c	min
	max
d_a	max
d_s	max
	Grade A	min
	Grade B	min
d_w	Grade A	min
	Grade B	min
e	Grade A	min
	Grade B	min
k	Nominal Size
	Grade A	min
		max
	Grade B	min
		max
k₁	min
r	min
s	max=nominal size
	Grade A	min
	Grade B	min

3	3	3	3	4	4	4	4	4	4	4	4	4
-	-	-	-	-	-	-	-	-	-	-	-	-
90	96	102	-	-	-	-	-	-	-	-	-	-
96	102	108	116	124	132	140	148	158	164	172	192	-
109	115	121	129	137	145	153	161	169	177	185	205	225
0.3	0.3	0.3	0.3	-	-	-	-	-	-	-	-	-
1	1	1	1	1	1	1	1	1	1	2	2	2
45.6	48.6	52.6	56.6	63	67	71	75	79	83	87	97	108
42	45	48	52	56	60	64	68	72	76	80	90	100
-	-	-	-	-	-	-	-	-	-	-	-	-
41.38	44.38	47.38	51.26	55.26	59.26	63.26	67.26	71.26	75.26	79.26	89.13	99.13
-	-	-	-	-	-	-	-	-	-	-	-	-
59.9	64.7	69.4	74.2	78.7	83.4	88.2	92.9	97.7	102.4	107.2	121.1	135.4
-	-	-	-	-	-	-	-	-	-	-	-	-
71.3	76.95	82.6	88.25	93.56	99.21	104.86	110.51	116.16	121.81	127.46	144.08	161.03
26	28	30	33	35	38	40	43	45	48	50	57	63
-	-	-	-	-	-	-	-	-	-	-	-	-
-	-	-	-	-	-	-	-	-	-	-	-	-
25.58	27.58	29.58	32.5	34.5	37.5	39.5	42.5	44.5	47.5	49.5	56.4	62.4
26.42	28.42	30.42	33.5	35.5	38.5	40.5	43.5	45.5	48.5	50.5	57.6	63.6
17.9	19.3	20.9	22.8	24.2	26.2	27.6	29.8	31.2	33.2	34.6	39.5	43.7
1.2	1.2	1.6	1.6	2	2	2	2	2	2	2	2.5	2.5
65	70	75	80	85	90	95	100	105	110	115	130	145
-	-	-	-	-	-	-	-	-	-	-	-	-
63.1	68.1	73.1	78.1	82.8	87.8	92.8	97.8	102.8	107.8	112.8	127.5	142.5

Weight of per 1000 steel products(≈kg)

Length of Thread b

Process flow

Cold forging

Annealing treatment(if need) ➨ wiredrawing ➨ clod forging ➨ thread rolling ➨make heat treatment(if need) ➨ Finish ➨ Packing

Hot forging

Cutting material ➨ hot forging ➨ turning ➨ shrink diameter(half thread) ➨thread rolling ➨ make heat treatment(if need) ➨ Finish ➨ Packing

Mechanical capacity

NO.	Mechanical or physical property		Property class
			4.6	4.8	5.6	5.8	6.8	8.8		9.8	10.9	12.9/12.9
			4.6	4.8	5.6	5.8	6.8	D≤16mm^a	d＞16mm^b	d≤16mm	10.9	12.9/12.9
1	Tensile strength R_m,Mpa	nom.^c	400		500		600	800		900	1000	1200
1	Tensile strength R_m,Mpa	max.	400	420	500	520	600	800	830	900	1040	1220
2	Lower yield strength R_eL,Mpa	nom.^c	240	——	300	——	——	——	——	——	——	——
2	Lower yield strength R_eL,Mpa	max.	240	——	300	——	——	——	——	——	——	——
3	Stress at 0,2 % nonproportional elongation R_p0.2,Mpa	nom.^c	——	——	——	——	——	640	640	720	900	1080
3	Stress at 0,2 % nonproportional elongation R_p0.2,Mpa	max.	——	——	——	——	——	640	660	720	940	1100
4	Stress at 0,0048 d non-proportional elongation for full-size fasteners R_p^f,Mpa	nom.^c	——	320	——	400	480	——	——	——	——	——
4		max.	——	340^e	——	420^e	480^e	——	——	——	——	——
5	Stress under proof load S_p^f,Mpa	nom.	225	310	280	380	440	580	600	650	830	970
5	Proof S_p,nom/R_{eL min} Or strength S_p,nom/R_p0.2min Or rati S_p,nom/R_{pf min}		0.94	0.91	0.93	0.9	0.92	0.91	0.91	0.9	0.88	0.88
6	Percentage elongation after fracture for machined test pieces,A,%	min.	22	——	20	——	——	12	12	10	9	8
7	Percentage reduction of area after fracture for machined test pieces,Z,%	min.	——					52		48	48	44
8	Elongation after fracture for full-size fasteners,A_f	min.	——	0.24	——	0.22	0.2	——	——	——	——	——
9	Head soundness		No fracture
10	Vickers hardness, HV, F≥98N	min.	120	130	155	160	190	250	255	290	320	385
10	Vickers hardness, HV, F≥98N	max.	220^g				250	320	335	360	380	435
11	Brinell hardness, HBW ,F=30D²	min.	114	124	147	152	181	238	242	276	304	366
11	Brinell hardness, HBW ,F=30D²	max.	209^g				238	304	318	342	361	414
12	Rockwell hardness,HRB , HRB	min.	67	71	79	82	89
	Rockwell hardness,HRB , HRB	max.	95^g				99.5
	Rockwell hardness, HRC	min.	——					22	23	28	32	39
	Rockwell hardness, HRC	max.	——					32	34	37	39	44
13	Surface hardness HV 0.3	max.	——					h			h,j	h,j
14	Height of non-decarburized thread zone,E,mm	min.	——					1/2H₁			2/3H₁	3/4H₁
14	Depth of complete decarburization in the thread,G,mm	max.	——					0.015
15	Reduction of hardness after retempering,HV	max.	——					20
16	Breaking torque, M_B,N·m	min.	——					in accordance with ISO 898-7
17	Impact strength, K_V^K,I,J	min.	——		27	——		27	27	27	27	m
18	Surface integrity in accordance with		ISO 6157-1ⁿ									ISO 6157-3
a Values do not apply for structural bolting. b For structural bolting d W M12. c Nominal values are specified only for the purpose of the designation system for property classes. See Clause 5. d In cases where the lower yield strength ReL cannot be determined, it is permissible to measure the stress at 0,2 % non-proportional elongation Rp0,2. e For the property classes 4.8, 5.8 and 6.8 the values for Rpf min are under investigation. The present values are given for calculation of the proof stress ratio only. They are not test values. f Proof loads are specified in Tables 5 and 7. g Hardness determined at the end of a fastener shall be 250 HV, 238 HB or 99,5 HRB maximum. h Surface hardness shall not be more than 30 Vickers points above the measured core hardness of the fastener when determination of both surface hardness and core hardness are carried out with HV 0,3. i Any increase in hardness at the surface which indicates that the surface hardness exceeds 390 HV is not acceptable. j Any increase in hardness at the surface which indicates that the surface hardness exceeds 435 HV is not acceptable. k Values are determined at a test temperature of −20 °C, see 9.14. l Applies to d W 16 mm. m Value for KV is under investigation. n Instead of ISO 6157-1, ISO 6157-3 may apply by agreement between the manufacturer and the purchaser.

Product Grade

Class4.8 Class5.8 Class6.8 Class8.8 Class10.9 Class12.9

Materials and Chemical compstition

1008

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Al
0.06	0.06	0.33	0.013	0.003	0.01	0	0.01	0.028

1035

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.34	0.13	0.73	0.012	0.002	0.02	0.01	0.02

10B21

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	B
0.2	0.04	0.81	0.017	0.007	0.017	0.0021

1045

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.45	0.23	0.58	0.014	0.006	0.057	0.008	0.016

40CR

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.4	0.21	0.54	0.015	0.008	0.95	0.02	0.02

35CRMO

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Mo
0.35	0.22	0.59	0.01	0.003	0.93	0.01	0.01	0.21

42CRMO

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Mo
0.42	0.27	0.92	0.013	0.004	1.01	0.03	0.04	0.2

Finish

PLAIN ZP YZP BLACK HDG DACROMET GEOMET CHROME NICKEL AND SO ON

PACKING

QBH BULK

20-25KG/CTN,36CTNS/PALLET

20-30KG/BAGS,36BAGS/PALLET

ONE TON/BOXES

50KG/ IRON DRUM,12 IRON DRUMS/PALLET

QBH SMALL PACKING

Packing in small boxes according to customer’s requirements

Packing in plastic bag according to customer’s requirements

QBH PALLET TYPE

SOLID WOOD FUMIGATION PALLET

EURO Pallet

THREE SPLINT PALLET

WOODEN BOX

The advantages of QBH

QBH brand sales to the main quality assurance.
Years of export trade management, excellent service, word-of-mouth guarantee.
By working with TUV,escort for quality.
Customization of non-standard parts can be made according to customer's requirements and drawings.
For quality customers,we can provide a certain credit period.

Product application

These Class 8.8 steel screws are suitable for fastening most machinery and equipment. Dimensions

meet ISO (formerly DIN) specifications. Length is measured from under the head.

Zinc-plated steel screws resist corrosion in wet environments. Match the thread spacing of mating

components. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the

finer the thread, the better the resistance.

Tags:

Steel Nut Bolts

Steel Hex Bolt

Carbon Steel Bolt

High Tensile Stainless Steel Bolts

Carbon Steel Nuts

Stainless Steel Nut

Steel Flat Washer

Spring Steel Washers

Stainless Steel Washer

Fully Threaded Studs

Non Standard Fasteners

Seismic Wedge Anchors

Self Tapping Screw

Electrical Fasteners

Solar Panel Fasteners

Stainless Steel Shackle

M52 DIN960 CL12.9 Partially Threaded Machine Screws

DIN960 Partially Threaded Machine Screws

M52 Partially Threaded Machine Screws

ISO 898 Half Thread Screw

DIN 960 - Partially Threaded Hex Cap Screw (Fine Thread)

Current norm: DIN EN 28765 Equivalent norms: ISO 8765; CSN 021101; PN 82101; UNI 5738; EU 28676;

Legend:

Makings:QBH

IFI Steel Hex Bolt,

ASME Stainless Steel Hex Head Bolts,

Steel Nut Bolts

Steel Hex Bolt

Carbon Steel Bolt

High Tensile Stainless Steel Bolts

Carbon Steel Nuts

Stainless Steel Nut

Steel Flat Washer

Spring Steel Washers

Stainless Steel Washer

Fully Threaded Studs

Non Standard Fasteners

Seismic Wedge Anchors

Self Tapping Screw

Electrical Fasteners

Solar Panel Fasteners

Stainless Steel Shackle

DIN960 Partially Threaded Machine Screws

M52 Partially Threaded Machine Screws

ISO 898 Half Thread Screw

DIN 960 - Partially Threaded Hex Cap Screw (Fine Thread)

Current norm: DIN EN 28765 Equivalent norms: ISO 8765; CSN 021101; PN 82101; UNI 5738; EU 28676;

Legend:

Makings:QBH

IFI Steel Hex Bolt,

ASME Stainless Steel Hex Head Bolts,

Current norm: DIN EN 28765
Equivalent norms: ISO 8765; CSN 021101; PN 82101; UNI 5738; EU 28676;

Current norm: DIN EN 28765
Equivalent norms: ISO 8765; CSN 021101; PN 82101; UNI 5738; EU 28676;