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Email:sst@szsst88.com
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Address:Building 9, First Industrial Zone, Tantou Industrial City, Songgang Street, Baoan District, Shenzhen 518105, Guangdong, China
Small screws have different thread pitches due to different thread diameter sizes. Shenzhen Shi Shi Tong talks about the small screw dimensions below the M3 specification – the pitch and the thread diameter.
M/M Coarse Machine Thread Screw 6G
| Size | Pitch | Thread Diameter Tolerance | |
| Max | Min | ||
| M1.2 | 0.25 | 1.18 | 1.14 |
| M1.4 | 0.3 | 1.38 | 1.34 |
| M1.6 | 0.35 | 1.581 | 1.496 |
| M1.7 | 0.35 | 1.68 | 1.61 |
| M1.8 | 0.35 | 1.781 | 1.696 |
| M2 | 0.4 | 1.981 | 1.886 |
| M2.3 | 0.4 | 2.281 | 2.186 |
| M2.6 | 0.45 | 2.58 | 2.48 |
| M3 | 0.5 | 2.98 | 2.874 |
M/M Fine Machine Thread Screw 6G
| Size | Pitch | Thread Diameter Tolerance | |
| Max | Min | ||
| M2.5 | 0.35 | 2.481 | 2.396 |
| M3 | 0.35 | 2.981 | 2.896 |
UNC Machine Small Screw Dimensions
| Size | T | Thread Diameter Tolerance | |
| Max | Min | ||
| #1 | 64 | 1.838 | 1.743 |
| #2 | 56 | 2.169 | 2.066 |
| #3 | 48 | 2.496 | 2.383 |
| #4 | 40 | 2.824 | 2.695 |
| #5 | 40 | 3.154 | 3.026 |
| #6 | 32 | 3.484 | 3.333 |
UNF Machine Small Screw Dimensions
| Size | T | Thread Diameter Tolerance | |
| Max | Min | ||
| #2 | 64 | 2.169 | 2.073 |
| #3 | 56 | 2.496 | 2.393 |
| #4 | 48 | 2.827 | 2.713 |
| #5 | 44 | 3.157 | 3.036 |
| #6 | 40 | 3.484 | 3.356 |
BSW Machine Small Screw Dimensions
| Size | T | Thread Diameter Tolerance | |
| Max | Min | ||
| 1/16 | 60 | 1.56 | 1.47 |
| 3/32 | 48 | 2.361 | 2.155 |
| 1/8 | 40 | 3.155 | 3.045 |
| 5/32 | 32 | 3.945 | 3.795 |
Tapping Screw ASA Type A
| Size | T | Thread Diameter Tolerance | |
| Max | Min | ||
| #0 | 40 | 1.52 | 1.44 |
| #1 | 32 | 1.9 | 1.82 |
| #2 | 32 | 2.23 | 2.13 |
| #3 | 28 | 2.56 | 2.46 |
| #4 | 24 | 2.89 | 2.79 |
| #5 | 20 | 3.3 | 3.2 |
| #6 | 18 | 3.58 | 3.45 |
Tapping Screw ASA Type AB. (B)
| Size | T | Thread Diameter Tolerance | |
| Max | Min | ||
| #0 | 48 | 1.52 | 1.37 |
| #1 | 42 | 1.9 | 1.75 |
| #2 | 32 | 2.23 | 2.08 |
| #3 | 28 | 2.56 | 2.41 |
| #4 | 24 | 2.89 | 2.74 |
| #5 | 20 | 3.3 | 3.12 |
| #6 | 20 | 3.5 | 3.35 |
M/M Tapping Screw Type A
| Size | T | Thread Diameter Tolerance | |
| Max | Min | ||
| ST1 | 60 | 1.05 | 1 |
| ST1.2 | 56 | 1.25 | 1.2 |
| ST1.4 | 48 | 1.5 | 1.4 |
| ST1.7 | 40 | 1.8 | 1.7 |
| ST2 | 32 | 2.1 | 2 |
| ST2.3 | 32 | 2.4 | 2.3 |
| ST2.6 | 28 | 2.7 | 2.6 |
| ST3 | 24 | 3.1 | 3 |
M/M Tapping Screw Type AB. (B)
| Size | T | Thread Diameter Tolerance | |
| Max | Min | ||
| ST1 | 64 | 1 | 0.95 |
| ST1.2 | 64 | 1.2 | 1.15 |
| ST1.4 | 56 | 1.4 | 1.35 |
| ST1.7 | 48 | 1.7 | 1.62 |
| ST2 | 40 | 2 | 1.9 |
| ST2.3 | 32 | 2.3 | 2.2 |
| ST2.6 | 28 | 2.6 | 2.5 |
| ST3 | 24 | 3 | 2.9 |
If you want to know more about the small screw dimensions, please feel free to contact us at: annie.li@szsst88.com
10月-11-2018
kalyn
+86 18818786322
sst@szsst88.com
