MOQ: | 900KG |
Price: | Negotiation |
Standard Packaging: | 25KG/CTN,36CTN/PALLET or small packing |
Delivery Period: | 30DAYS |
Payment Method: | L/C, T/T,OA |
Supply Capacity: | 600TON/MONTH |
Socket head cap screws are commonly used in machine assembly for removable panels and parts. They have a round cap with a hex head and are tightened with a socket wrench drive. Longer caps are easier to see when fastened, while button and flat head caps are less likely to snag clothing or linkages. Cap screws with a black oxide or armor coat finish resist corrosion.
Product Grade
Class4.8 Class5.8 Class6.8 Class8.8 Class10.9 Class12.9
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
MOQ: | 900KG |
Price: | Negotiation |
Standard Packaging: | 25KG/CTN,36CTN/PALLET or small packing |
Delivery Period: | 30DAYS |
Payment Method: | L/C, T/T,OA |
Supply Capacity: | 600TON/MONTH |
Socket head cap screws are commonly used in machine assembly for removable panels and parts. They have a round cap with a hex head and are tightened with a socket wrench drive. Longer caps are easier to see when fastened, while button and flat head caps are less likely to snag clothing or linkages. Cap screws with a black oxide or armor coat finish resist corrosion.
Product Grade
Class4.8 Class5.8 Class6.8 Class8.8 Class10.9 Class12.9
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