Send Message
products
PRODUCTS DETAILS
Home > Products >
DIN604 Flat Countersunk Nib Bolts 12.9 Carbon Steel Bolt

DIN604 Flat Countersunk Nib Bolts 12.9 Carbon Steel Bolt

MOQ: 900kg
Price: Negotiation
Standard Packaging: 25kg Carton+900kg/Pallet
Delivery Period: 30days
Payment Method: L/C, T/T,OA
Supply Capacity: 200TON/MONTH
Detail Information
Place of Origin
CHINA
Brand Name
QBH
Certification
ISO9001
Model Number
DIN604
Material:
Carbon Steel
Size:
M6-M24
Surface Treatment:
Plain,Zinc,Black,H.D.G
Grade:
6.8/8.8/10.9/12.9
Process:
Cold Forging
Sample:
Free Sample
Packaging:
25kg Carton+900kg/Pallet
Minimum Order Quantity:
900kg
Price:
Negotiation
Packaging Details:
25kg Carton+900kg/Pallet
Delivery Time:
30days
Payment Terms:
L/C, T/T,OA
Supply Ability:
200TON/MONTH
High Light:

DIN604 Carbon Steel Bolt

,

12.9 Carbon Steel Bolt

,

6.8 Countersunk Nib Bolts

Product Description

DIN 604 - Flat countersunk nib bolts with hexagon nut

Current norm: DIN 604
Equivalent norms: CSN 021324; PN 82408; UNI 6105;

 

Countersunk Nib Bolts are generally used for steel or timber applications where a flat, countersunk finish is required on the fastened surface.

Similar to a Plow Bolt but instead of a square neck recess, a keyway is cut into the countersunk recess to seat the nib, allowing the bolt to be nut tightened and secured in place

 
DIN604 Flat Countersunk Nib Bolts 12.9 Carbon Steel Bolt 0
 

Legend:

b - length of the thread (at least)
l - length of bolt
d - the nominal diameter of the thread
k - head height
ds - diameter of the screw shank
g - width of the nib
dk - head diameter
i - height of the nose
lg - length of the thread
ls - length of the shank to the start of the thread
α - angle head

Makings:QBH

Steel: 3.6,4.6
Stainless: -
Plastic: -
Non Ferrous: -
Thread: 8g

Notes:

 
Screw Thread
d
M6 M8 M10 M12 M16 M20 M24
P Pitch
b L≤125
125<L≤200
L>200
dk max
min
s max
min
k max
α min
max
1.00 1.25 1.50 1.75 2.00 2.50 3.00
18 22 26 30 38 46 54
24 28 32 36 44 52 60
  41 45 49 57 65 73
12.55 16.55 19.65 24.65 32.80 32.80 38.80
11.45 15.45 18.35 23.35 31.20 31.20 37.20
2.50 3.00 3.20 3.60 4.20 5.40 6.60
2.10 2.60 2.72 3.12 3.72 4.92 6.02
4.00 5.00 5.50 7.00 9.00 11.50 13.00
90° 90° 90° 90° 90° 60° 60°
95° 95° 95° 95° 95° 65° 65°
 
 
 
 

Process flow

 

 

Cold forging

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

 

 

 

 

 

 

Product Grade

 

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

 

 

 

 

Mechanical property

 

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.

 


 

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.

 


-

 
products
PRODUCTS DETAILS
DIN604 Flat Countersunk Nib Bolts 12.9 Carbon Steel Bolt
MOQ: 900kg
Price: Negotiation
Standard Packaging: 25kg Carton+900kg/Pallet
Delivery Period: 30days
Payment Method: L/C, T/T,OA
Supply Capacity: 200TON/MONTH
Detail Information
Place of Origin
CHINA
Brand Name
QBH
Certification
ISO9001
Model Number
DIN604
Material:
Carbon Steel
Size:
M6-M24
Surface Treatment:
Plain,Zinc,Black,H.D.G
Grade:
6.8/8.8/10.9/12.9
Process:
Cold Forging
Sample:
Free Sample
Packaging:
25kg Carton+900kg/Pallet
Minimum Order Quantity:
900kg
Price:
Negotiation
Packaging Details:
25kg Carton+900kg/Pallet
Delivery Time:
30days
Payment Terms:
L/C, T/T,OA
Supply Ability:
200TON/MONTH
High Light

DIN604 Carbon Steel Bolt

,

12.9 Carbon Steel Bolt

,

6.8 Countersunk Nib Bolts

Product Description

DIN 604 - Flat countersunk nib bolts with hexagon nut

Current norm: DIN 604
Equivalent norms: CSN 021324; PN 82408; UNI 6105;

 

Countersunk Nib Bolts are generally used for steel or timber applications where a flat, countersunk finish is required on the fastened surface.

Similar to a Plow Bolt but instead of a square neck recess, a keyway is cut into the countersunk recess to seat the nib, allowing the bolt to be nut tightened and secured in place

 
DIN604 Flat Countersunk Nib Bolts 12.9 Carbon Steel Bolt 0
 

Legend:

b - length of the thread (at least)
l - length of bolt
d - the nominal diameter of the thread
k - head height
ds - diameter of the screw shank
g - width of the nib
dk - head diameter
i - height of the nose
lg - length of the thread
ls - length of the shank to the start of the thread
α - angle head

Makings:QBH

Steel: 3.6,4.6
Stainless: -
Plastic: -
Non Ferrous: -
Thread: 8g

Notes:

 
Screw Thread
d
M6 M8 M10 M12 M16 M20 M24
P Pitch
b L≤125
125<L≤200
L>200
dk max
min
s max
min
k max
α min
max
1.00 1.25 1.50 1.75 2.00 2.50 3.00
18 22 26 30 38 46 54
24 28 32 36 44 52 60
  41 45 49 57 65 73
12.55 16.55 19.65 24.65 32.80 32.80 38.80
11.45 15.45 18.35 23.35 31.20 31.20 37.20
2.50 3.00 3.20 3.60 4.20 5.40 6.60
2.10 2.60 2.72 3.12 3.72 4.92 6.02
4.00 5.00 5.50 7.00 9.00 11.50 13.00
90° 90° 90° 90° 90° 60° 60°
95° 95° 95° 95° 95° 65° 65°
 
 
 
 

Process flow

 

 

Cold forging

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

 

 

 

 

 

 

Product Grade

 

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

 

 

 

 

Mechanical property

 

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.

 


 

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.

 


-

 
Sitemap |  Privacy Policy | China Good Quality Steel Nut Bolts Supplier. Copyright © 2020-2024 steelnutbolts.com . All Rights Reserved.