Machine And Hand Taps-Bs Standard
Material: Alloy Tool Steel
(BSW)
Metric System:mm
| Thread specification d | Pitch p | Nominal Diameter d | Overall Length L | Thread Length l | Shank Diameter d1 | Size of Square a |
| 1/8-40 | 0.635 | 3.175 | 48 | 11 | 3.15 | 2.5 |
| 3/16-24 | 1.058 | 4.762 | 58 | 16 | 3.55 | 2.8 |
| 1/4-20 | 1.270 | 6.350 | 66 | 19 | 6.3 | 5.0 |
| 5/16-18 | 1.411 | 7.938 | 72 | 22 |
| 3/8-16 | 1.588 | 9.525 | 80 | 24 | 7.1 | 5.6 |
| 7/16-14 | 1.814 | 11.112 | 85 | 25 | 8 | 6.3 |
| 1/2-12 | 2.117 | 12.7 | 89 | 29 | 9 | 7.1 |
| 9/16-12 | 14.228 | 95 | 30 | 11.2 | 9 |
| 5/8-11 | 2.309 | 15.875 | 102 | 32 | 12.5 | 10 |
| 11/16-11 | 17.462 | 112 | 37 | 14 | 11.2 |
| 3/4-10 | 2.540 | 19.05 |
| 7/8-9 | 2.822 | 22.225 | 118 | 38 | 16 | 12.5 |
| 1"-8 | 3.175 | 25.4 | 130 | 45 | 18 | 14 |
(BSF)
Metric System:mm
| Thread specification | Pitch p | Nominal Diameter d | Overall Length L | Thread Length l | Shank Diameter d1 | Size of Square a |
| 3/16-32 | 0.794 | 4.762 | 58 | 16 | 5.0 | 4 |
| 7/32-28 | 0.907 | 5.556 | 62 | 17 | 5.6 | 4.5 |
| 1/4-26 | 0.977 | 6.350 | 66 | 19 | 6.3 | 5.0 |
| 9/32-26 | 7.144 | 7.1 |
| 5/16-22 | 1.154 | 7.938 | 72 | 22 | 6.3 |
| 3/8-20 | 1.270 | 9.525 | 80 | 24 | 7.1 | 5.6 |
| 7/16-18 | 1.411 | 11.112 | 85 | 25 | 8.0 | 6.3 |
| 1/2-16 | 1.588 | 12.7 | 89 | 29 | 9.0 | 7.1 |
| 9/16-16 | 14.288 | 95 | 30 | 11.2 | 9 |
| 5/8-14 | 1.814 | 15.875 | 102 | 32 | 12.5 | 10 |
| 11/16-14 | 17.462 | 112 | 37 | 14 | 11.2 |
| 3/4-12 | 2.117 | 19.05 |
| 7/8-11 | 2.309 | 22.225 | 118 | 38 | 16 | 12.5 |
| 1"-10 | 2.540 | 25.4 | 130 | 45 | 18 | 14 |
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