DIN371
UNC ≈DIN371 HSSE
Spiral Fluted Machine Taps with Reinforsed Shank for Unified Coarse Thread ANSI B1.1.
35° Right-hand Helix.
Grade of fit 2B. Grinded thread profile.
Form C: 2 - 3 threads leads.
Form C: 2 - 3 threads leads.
| Symbol | No of Threads 1" | L, mm | l1, mm | l2, mm | d1, mm | a, mm | z | Article number |
| UNC Nr4 | 40 | 56 | 7 | 18 | 3.5 | 2.7 | 3 | 2316 UNC Nr4x40 |
| UNC Nr5 | 40 | 56 | 7 | 18 | 3.5 | 2.7 | 3 | 2316 UNC Nr5x40 |
| UNC Nr6 | 32 | 56 | 8 | 20 | 4.0 | 3.0 | 3 | 2316 UNC Nr6x32 |
| UNC Nr8 | 32 | 63 | 8 | 21 | 4.5 | 3.4 | 3 | 2316 UNC Nr8x32 |
| UNC Nr.10 | 24 | 70 | 10 | 25 | 6.0 | 4.9 | 3 | 2316 UNC Nr10x24 |
| UNC Nr.12 | 24 | 70 | 10 | 25 | 6.0 | 4.9 | 3 | 2316 UNC Nr12x24 |
| UNC1/4 | 20 | 80 | 13 | 30 | 7.0 | 5.5 | 3 | 2316 UNC 1/4x20 |
| UNC5/16 | 18 | 90 | 14 | 35 | 8.0 | 6.2 | 3 | 2316 UNC 5/16x18 |
| UNC3/8 | 16 | 100 | 16 | 39 | 9.0 | 7.0 | 3 | 2316 UNC 3/8x16 |