Socket Head Cap Screw Dimensions
By Emmanuel Admin •
January 07, 2022
Posted in Charts
| Basic Screw Diameter | Body Diameter (D) |
| Head Diameter (A) |
| Head Height (H) |
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| Size | Max | Min | Max | Min | Max | Min |
| 0 | 0.06" | 0.0568" | 0.096" | 0.091" | 0.06" | 0.057" |
| 1 | 0.073" | 0.0695" | 0.118" | 0.112" | 0.073" | 0.07" |
| 2 | 0.086" | 0.0822" | 0.14" | 0.134" | 0.086" | 0.083" |
| 3 | 0.099" | 0.0949" | 0.161" | 0.154" | 0.099" | 0.095" |
| 4 | 0.112" | 0.1075" | 0.183" | 0.176" | 0.112" | 0.108" |
| 5 | 0.125" | 0.1202" | 0.205" | 0.198" | 0.125" | 0.121" |
| 6 | 0.138" | 0.1329" | 0.226" | 0.218" | 0.138" | 0.134" |
| 8 | 0.164" | 0.1585" | 0.27" | 0.262" | 0.164" | 0.159" |
| 10 | 0.19" | 0.184" | 0.312" | 0.303" | 0.19" | 0.185" |
| 1/4 | 0.25" | 0.2435" | 0.375" | 0.365" | 0.25" | 0.244" |
| 5/16 | 0.3125" | 0.3053" | 0.469" | 0.457" | 0.312" | 0.306" |
| 3/8 | 0.375" | 0.3678" | 0.562" | 0.55" | 0.375" | 0.368" |
| 7/16 | 0.4375" | 0.4294" | 0.656" | 0.642" | 0.438" | 0.43" |
| 1/2 | 0.5" | 0.4919" | 0.75" | 0.735" | 0.5" | 0.492" |
| 5/8 | 0.625" | 0.6163" | 0.938" | 0.921" | 0.625" | 0.616" |
| 3/4 | 0.75" | 0.7406" | 1.125" | 1.107" | 0.75" | 0.74" |
| 7/8 | 0.875" | 0.8647" | 1.312" | 1.293" | 0.875" | 0.864" |
| 1 | 1" | 0.9886" | 1.5" | 1.479" | 1" | 0.988" |
| 1-1/4 | 1.25" | 1.2336" | 1.875" | 1.852" | 1.25" | 1.236" |
| 1-1/2 | 1.5" | 1.4818" | 2.25" | 2.224" | 1.5" | 1.485" |
Shop: Socket Head Cap Screws
Mechanical Properties of Socket Cap Screws - Alloy and Stainless Steel
Nominal Size
| Tensile Strength (lbs., min) | Yield Strength (lbs., min) | Body Section | Tightening Torque (in. - lbs.) |
| UNRC | UNRF | UNRC | UNRF | Single Shear Strength (lbs., min.) | UNRC | UNRF |
| Alloy | Stainless | Alloy | Stainless | Alloy | Stainless | Alloy | Stainless | Alloy | Stainless | Alloy | Stainless | Alloy | Stainless |
| 0 | - | - | 320 | 145 | - | - | 290 | 72 | 305 | 130 | - | - | 2.6 | 1.4 |
| 1 | 475 | - | 500 | 220 | 425 | - | 450 | 111 | 450 | 190 | 4.5 | - | 4.8 | 2.3 |
| 2 | 665 | 295 | 710 | - | 600 | 185 | 635 | - | 625 | 260 | 7.5 | 3.8 | 8 | - |
| 3 | 875 | - | 940 | - | 790 | - | 845 | - | 830 | - | 11 | - | 12 | - |
| 4 | 1,090 | 480 | 1,190 | - | 975 | 240 | 1,070 | - | 1,060 | 350 | 16 | 6 | 18 | - |
| 5 | 1,430 | - | 1,490 | - | 1,290 | - | 1,345 | - | 1,325 | - | 24 | - | 24 | - |
| 6 | 1,640 | 725 | 1,825 | - | 1,470 | 363 | 1,645 | - | 1,615 | 375 | 30 | 15 | 34 | - |
| 8 | 2,520 | 1,120 | 2,650 | - | 2,270 | 560 | 2,385 | - | 2,280 | 670 | 55 | 28 | 58 | - |
| 10 | 3,150 | 1,400 | 3,600 | 1,600 | 2,835 | 701 | 3,240 | 800 | 3,060 | 950 | 79 | 40 | 90 | 46 |
| 1/4 | 5,725 | 2,550 | 6,550 | 2,910 | 5,150 | 1,273 | 5,900 | 1,455 | 5,295 | 2,200 | 200 | 95 | 230 | 109 |
| 5/16 | 9,430 | 4,200 | 10,440 | 4,645 | 8,490 | 2,100 | 9,395 | 2,230 | 8,285 | 3,450 | 415 | 170 | 460 | 188 |
| 3/8 | 13,950 | 6,100 | 15,805 | 7,025 | 12,555 | 3,100 | 14,225 | 3,510 | 11,910 | 4,970 | 740 | 301 | 845 | 341 |
| 7/16 | 19,135 | - | 21,365 | - | 17,220 | - | 19,230 | - | 16,200 | - | 1,190.00 | - | 1,305.00 | - |
| 1/2 | 25,540 | 11,350 | 28,780 | - | 22,990 | 5,675 | 25,905 | - | 21,175 | 8,840 | 1,800.00 | 750 | 2,065.00 | - |
| 5/8 | 38,400 | - | 43,500 | - | 34,550 | - | 39,150 | - | 31,300 | - | 3,400.00 | - | 3,800.00 | - |
| 3/4 | 56,750 | - | 63,400 | - | 51,100 | - | 57,050 | - | 45,050 | - | 6,000.00 | - | 6,750.00 | - |
| 7/8 | 78,500 | - | 86,500 | - | 70,700 | - | 77,850 | - | 61,350 | - | 8,250.00 | - | 9,200.00 | - |
| 1 | 103,000 | - | 112,700 | - | 92,700 | - | 101,450 | - | 80,100 | - | 12,500.00 | - | 13,000.00 | - |
| 1-1/4 | 164,700 | - | 182,400 | - | 148,250 | - | 164,150 | - | 125,100 | - | 25,000.00 | - | 27,750.00 | - |
| 1-1/2 | 238,800 | - | 268,800 | - | 215,950 | - | 241,900 | - | 180,200 | - | 43,500.00 | - | 49,000.00 | - |
