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.
| Size | |
| d | Screw Diameter | | PP | UNC | | UNF | | UNEF | | ds | max=nominal size | | min | | dk | max | | min | | k | max | | min | | s | Nominal Size | | t | min | | b | min | | | 0.060 | 0.073 | 0.086 | 0.099 | 0.112 | 0.125 | 0.138 | 0.164 | 0.190 | 0.250 | 0.3125 | 0.375 | 0.4375 | 0.500 | 0.625 | 0.750 | | - | 64.0 | 56.0 | 48.0 | 40.0 | 40.0 | 32.0 | 32.0 | 24.0 | 20.0 | 18.0 | 16.0 | 14.0 | 13.0 | 11.0 | 10.0 | | 80.0 | 72.0 | 64.0 | 56.0 | 48.0 | 44.0 | 40.0 | 36.0 | 32.0 | 28.0 | 24.0 | 24.0 | 20.0 | 20.0 | 18.0 | 16.0 | | - | - | - | - | - | - | - | - | - | 32.0 | 32.0 | 32.0 | 28.0 | 28.0 | 24.0 | 20.0 | | 0.060 | 0.073 | 0.086 | 0.099 | 0.112 | 0.125 | 0.138 | 0.164 | 0.190 | 0.250 | 0.3125 | 0.375 | 0.4375 | 0.500 | 0.625 | 0.750 | | 0.0568 | 0.0695 | 0.0822 | 0.0949 | 0.1075 | 0.1202 | 0.1329 | 0.1585 | 0.1840 | 0.2435 | 0.3053 | 0.3678 | 0.4294 | 0.4919 | 0.6163 | 0.7406 | | 0.096 | 0.118 | 0.140 | 0.161 | 0.183 | 0.205 | 0.226 | 0.270 | 0.312 | 0.375 | 0.469 | 0.562 | 0.656 | 0.750 | 0.938 | 1.125 | | 0.091 | 0.112 | 0.134 | 0.154 | 0.176 | 0.198 | 0.218 | 0.262 | 0.303 | 0.365 | 0.457 | 0.550 | 0.642 | 0.735 | 0.921 | 1.107 | | 0.060 | 0.073 | 0.086 | 0.099 | 0.112 | 0.125 | 0.138 | 0.164 | 0.190 | 0.250 | 0.312 | 0.375 | 0.438 | 0.500 | 0.625 | 0.750 | | 0.057 | 0.070 | 0.083 | 0.095 | 0.108 | 0.121 | 0.134 | 0.159 | 0.185 | 0.244 | 0.306 | 0.368 | 0.430 | 0.492 | 0.616 | 0.740 | | 0.050 | 0.062 | 0.078 | 0.078 | 0.094 | 0.094 | 0.109 | 0.141 | 0.156 | 0.188 | 0.250 | 0.312 | 0.375 | 0.375 | 0.500 | 0.625 | | 0.025 | 0.031 | 0.038 | 0.044 | 0.051 | 0.057 | 0.064 | 0.077 | 0.090 | 0.120 | 0.151 | 0.182 | 0.213 | 0.245 | 0.307 | 0.370 | | 0.50 | 0.62 | 0.62 | 0.62 | 0.75 | 0.75 | 0.75 | 0.88 | 0.88 | 1.00 | 1.12 | 1.25 | 1.38 | 1.50 | 1.75 | 2.00 | |
| Size | |
| d | Screw Diameter | | PP | UNC | | UNF | | UNEF | | ds | max=nominal size | | min | | dk | max | | min | | k | max | | min | | s | Nominal Size | | t | min | | b | min | | | 0.875 | 1.000 | 1.125 | 1.250 | 1.375 | 1.500 | 1.750 | 2.000 | 2.250 | 2.500 | 2.750 | 3.000 | 3.250 | 3.500 | 3.750 | 4.000 | | 9.0 | 8.0 | 7.0 | 7.0 | 6.0 | 6.0 | 5.0 | 4.5 | 4.5 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 | | 14.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | - | - | - | - | - | - | - | - | - | - | | 20.0 | 20.0 | 18.0 | 18.0 | 18.0 | 18.0 | - | - | - | - | - | - | - | - | - | - | | 0.875 | 1.000 | 1.125 | 1.250 | 1.375 | 1.500 | 1.750 | 2.000 | 2.250 | 2.500 | 2.750 | 3.000 | 3.250 | 3.500 | 3.750 | 4.000 | | 0.8647 | 0.9886 | 1.1086 | 1.2336 | 1.3568 | 1.4818 | 1.7295 | 1.9780 | 2.2280 | 2.4762 | 2.7262 | 2.9762 | 3.2262 | 3.4762 | 3.7262 | 3.9762 | | 1.312 | 1.500 | 1.688 | 1.875 | 2.062 | 2.250 | 2.625 | 3.000 | 3.375 | 3.750 | 4.125 | 4.500 | 4.875 | 5.250 | 5.625 | 6.000 | | 1.293 | 1.479 | 1.665 | 1.852 | 2.038 | 2.224 | 2.597 | 2.970 | 3.344 | 3.717 | 4.090 | 4.464 | 4.837 | 5.211 | 5.584 | 5.958 | | 0.875 | 1.000 | 1.125 | 1.250 | 1.375 | 1.500 | 1.750 | 2.000 | 2.250 | 2.500 | 2.750 | 3.000 | 3.250 | 3.500 | 3.750 | 4.000 | | 0.864 | 0.988 | 1.111 | 1.236 | 1.360 | 1.485 | 1.734 | 1.983 | 2.232 | 2.481 | 2.730 | 2.979 | 3.228 | 3.478 | 3.727 | 3.976 | | 0.750 | 0.750 | 0.875 | 0.875 | 1.000 | 1.000 | 1.250 | 1.500 | 1.750 | 1.750 | 2.000 | 2.250 | 2.250 | 2.750 | 2.750 | 3.000 | | 0.432 | 0.495 | 0.557 | 0.620 | 0.682 | 0.745 | 0.870 | 0.995 | 1.120 | 1.245 | 1.370 | 1.495 | 1.620 | 1.745 | 1.870 | 1.995 | | 2.25 | 2.50 | 2.81 | 3.12 | 3.44 | 3.75 | 4.38 | 5.00 | 5.62 | 6.25 | 6.88 | 7.50 | 8.12 | 8.75 | 9.38 | 10.00 | |
Mechanical property :SAEJ429
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
Product Grade
Grade2 Grade5 Grade8
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.
