나사산 및 탭 드릴 표
이 표는 유니파이 나사 #0~1인치(UNC/UNF)와 ISO 미터 나사 M1~M24, 모두 39개 나사에 대해 외경(인치, 밀리미터), 보통·가는 피치, 그리고 나사산 물림률 약 75%에 해당하는 탭 드릴을 제공합니다.
39개 행
| #0 | Unified | 0.0600 | 1.524 | — | — | 80 TPI | 3/64" (1.21 mm exact) |
| #1 | Unified | 0.0730 | 1.854 | 64 TPI | #53 (1.46 mm exact) | 72 TPI | #53 (1.50 mm exact) |
| #2 | Unified | 0.0860 | 2.184 | 56 TPI | #51 (1.73 mm exact) | 64 TPI | #50 (1.79 mm exact) |
| #3 | Unified | 0.0990 | 2.515 | 48 TPI | 5/64" (1.99 mm exact) | 56 TPI | #46 (2.06 mm exact) |
| #4 | Unified | 0.1120 | 2.845 | 40 TPI | #44 (2.21 mm exact) | 48 TPI | #43 (2.32 mm exact) |
| #5 | Unified | 0.1250 | 3.175 | 40 TPI | #39 (2.54 mm exact) | 44 TPI | #38 (2.60 mm exact) |
| #6 | Unified | 0.1380 | 3.505 | 32 TPI | #36 (2.71 mm exact) | 40 TPI | #33 (2.87 mm exact) |
| #8 | Unified | 0.1640 | 4.166 | 32 TPI | #29 (3.37 mm exact) | 36 TPI | #29 (3.46 mm exact) |
| #10 | Unified | 0.1900 | 4.826 | 24 TPI | #25 (3.77 mm exact) | 32 TPI | #21 (4.03 mm exact) |
| #12 | Unified | 0.2160 | 5.486 | 24 TPI | #17 (4.43 mm exact) | 28 TPI | #15 (4.58 mm exact) |
| 1/4" | Unified | 0.2500 | 6.350 | 20 TPI | #8 (5.08 mm exact) | 28 TPI | #3 (5.44 mm exact) |
| 5/16" | Unified | 0.3125 | 7.938 | 18 TPI | F (6.53 mm exact) | 24 TPI | I (6.88 mm exact) |
| 3/8" | Unified | 0.3750 | 9.525 | 16 TPI | 5/16" (7.94 mm exact) | 24 TPI | Q (8.47 mm exact) |
| 7/16" | Unified | 0.4375 | 11.113 | 14 TPI | U (9.30 mm exact) | 20 TPI | W (9.84 mm exact) |
| 1/2" | Unified | 0.5000 | 12.700 | 13 TPI | 27/64" (10.75 mm exact) | 20 TPI | 29/64" (11.43 mm exact) |
| 9/16" | Unified | 0.5625 | 14.287 | 12 TPI | 31/64" (12.17 mm exact) | 18 TPI | 1/2" (12.88 mm exact) |
| 5/8" | Unified | 0.6250 | 15.875 | 11 TPI | 17/32" (13.57 mm exact) | 18 TPI | 9/16" (14.46 mm exact) |
| 3/4" | Unified | 0.7500 | 19.050 | 10 TPI | 21/32" (16.51 mm exact) | 16 TPI | 11/16" (17.46 mm exact) |
| 7/8" | Unified | 0.8750 | 22.225 | 9 TPI | 49/64" (19.40 mm exact) | 14 TPI | 51/64" (20.41 mm exact) |
| 1" | Unified | 1.0000 | 25.400 | 8 TPI | 7/8" (22.23 mm exact) | 12 TPI | 59/64" (23.28 mm exact) |
| M1 | ISO metric | 0.0394 | 1.000 | 0.25 mm | 0.80 mm (0.75 mm exact) | 0.2 mm | 0.80 mm (0.80 mm exact) |
| M1.2 | ISO metric | 0.0472 | 1.200 | 0.25 mm | 1.00 mm (0.95 mm exact) | 0.2 mm | 1.00 mm (1.00 mm exact) |
| M1.4 | ISO metric | 0.0551 | 1.400 | 0.3 mm | 1.10 mm (1.10 mm exact) | 0.2 mm | 1.20 mm (1.20 mm exact) |
| M1.6 | ISO metric | 0.0630 | 1.600 | 0.35 mm | 1.20 mm (1.25 mm exact) | 0.2 mm | 1.40 mm (1.40 mm exact) |
| M1.8 | ISO metric | 0.0709 | 1.800 | 0.35 mm | 1.40 mm (1.45 mm exact) | 0.2 mm | 1.60 mm (1.60 mm exact) |
| M2 | ISO metric | 0.0787 | 2.000 | 0.4 mm | 1.60 mm (1.60 mm exact) | 0.25 mm | 1.80 mm (1.75 mm exact) |
| M2.5 | ISO metric | 0.0984 | 2.500 | 0.45 mm | 2.00 mm (2.05 mm exact) | 0.35 mm | 2.20 mm (2.15 mm exact) |
| M3 | ISO metric | 0.1181 | 3.000 | 0.5 mm | 2.50 mm (2.50 mm exact) | 0.35 mm | 2.60 mm (2.65 mm exact) |
| M3.5 | ISO metric | 0.1378 | 3.500 | 0.6 mm | 2.90 mm (2.90 mm exact) | 0.35 mm | 3.20 mm (3.15 mm exact) |
| M4 | ISO metric | 0.1575 | 4.000 | 0.7 mm | 3.30 mm (3.30 mm exact) | 0.5 mm | 3.50 mm (3.50 mm exact) |
| M5 | ISO metric | 0.1968 | 5.000 | 0.8 mm | 4.20 mm (4.20 mm exact) | 0.5 mm | 4.50 mm (4.50 mm exact) |
| M6 | ISO metric | 0.2362 | 6.000 | 1 mm | 5.00 mm (5.00 mm exact) | 0.75 mm | 5.20 mm (5.25 mm exact) |
| M8 | ISO metric | 0.3150 | 8.000 | 1.25 mm | 6.80 mm (6.75 mm exact) | 1 mm | 7.00 mm (7.00 mm exact) |
| M10 | ISO metric | 0.3937 | 10.000 | 1.5 mm | 8.50 mm (8.50 mm exact) | 1.25 mm | 8.80 mm (8.75 mm exact) |
| M12 | ISO metric | 0.4724 | 12.000 | 1.75 mm | 10.20 mm (10.25 mm exact) | 1.5 mm | 10.50 mm (10.50 mm exact) |
| M14 | ISO metric | 0.5512 | 14.000 | 2 mm | 12.00 mm (12.00 mm exact) | 1.5 mm | 12.50 mm (12.50 mm exact) |
| M16 | ISO metric | 0.6299 | 16.000 | 2 mm | 14.00 mm (14.00 mm exact) | 1.5 mm | 14.50 mm (14.50 mm exact) |
| M20 | ISO metric | 0.7874 | 20.000 | 2.5 mm | 17.50 mm (17.50 mm exact) | 1.5 mm | 18.50 mm (18.50 mm exact) |
| M24 | ISO metric | 0.9449 | 24.000 | 3 mm | 21.00 mm (21.00 mm exact) | 2 mm | 22.00 mm (22.00 mm exact) |
출처: Unified threads per ASME B1.1 (UNC/UNF); metric per ISO 262 selected sizes. Numbered-screw major diameters follow D = 0.060 + 0.013 N inches exactly.
참고
Tap drill is the roughly 75% engagement rule — major diameter less 1/TPI for unified threads, less the pitch for metric — with the nearest stocked drill in brackets. Published preferred-tap charts round by convention rather than by formula and may differ by one size; for metric threads the rule is the convention and the two agree.
관련 계산기
Aperture Diagonal
Get the corner-to-corner diagonal of a rectangular aperture plus the stocked tool that covers it — the drill that clears the diagonal, or the cutter that fits the short side and the corner radius it leaves.
Max Pad Diameter
Find the largest pad that fits a component pitch while holding your fabricator’s clearance, with or without conductors routed between adjacent pads.
Via Calculator
Calculate PCB via impedance, capacitance, inductance, and current capacity. Get aspect ratio and DFM warnings for through-hole and blind vias. Free, instant results.