M52 DIN960 CL12.9 Partially Threaded Machine Screws

Place of Origin CHINA
Brand Name QBH
Certification ISO9001
Model Number DIN960 M4-M52
Minimum Order Quantity 500KG
Price 900USD-1200USD/TON
Packaging Details 25kg Carton+900kg/Pallet or 5KG/CTN
Delivery Time 30days
Payment Terms L/C, T/T,OA
Supply Ability 600TON/MONTH
Product Details
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
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DIN960 Partially Threaded Machine Screws

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M52 Partially Threaded Machine Screws

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ISO 898 Half Thread Screw

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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
M8 M10 M12 (M14) M16 (M18) M20 (M22) M24 (M27) M30 (M33) M36 (M39)
P Pitch Fine thread-1
Fine thread-2
b L≤125
125<L≤200
L>200
c min
max
da max
ds max
Grade A min
Grade B min
dw 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
M42 (M45) M48 (M52) M56 (M60) M64 (M68) M72 (M76) M80 M90 M100
P Pitch Fine thread-1
Fine thread-2
b L≤125
125<L≤200
L>200
c min
max
da max
ds max
Grade A min
Grade B min
dw 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  
D≤16mma d>16mmb d≤16mm  
1 Tensile strength
Rm,Mpa
nom.c 400 500 600 800 900 1000 1200  
max. 400 420 500 520 600 800 830 900 1040 1220  
2 Lower yield strength
ReL,Mpa
nom.c 240 —— 300 —— —— —— —— —— —— ——  
max. 240 —— 300 —— —— —— —— —— —— ——  
3 Stress at 0,2 % nonproportional elongation
Rp0.2,Mpa
nom.c —— —— —— —— —— 640 640 720 900 1080  
max. —— —— —— —— —— 640 660 720 940 1100  
4 Stress at 0,0048 d non-proportional elongation for
full-size fasteners
Rpf,Mpa
nom.c —— 320 —— 400 480 —— —— —— —— ——  
max. —— 340e —— 420e 480e —— —— —— —— ——  
5 Stress under proof load
Spf,Mpa
nom. 225 310 280 380 440 580 600 650 830 970  
Proof Sp,nom/ReL min Or
strength Sp,nom/Rp0.2min Or
rati Sp,nom/Rpf 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,Af
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  
max. 220g 250 320 335 360 380 435  
11 Brinell hardness, HBW
,F=30D²
min. 114 124 147 152 181 238 242 276 304 366  
max. 209g 238 304 318 342 361 414  
12 Rockwell hardness,HRB ,
HRB
min. 67 71 79 82 89    
max. 95g 99.5    
Rockwell hardness,
HRC
min. —— 22 23 28 32 39  
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  
Depth of complete decarburization in the
thread,G,mm
max. —— 0.015  
15 Reduction of hardness after retempering,HV max. —— 20  
16 Breaking torque,
MB,N·m
min. —— in accordance with ISO 898-7  
17 Impact strength,
KVK,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.