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1/4-20 UNC female boss section, Unified basic profile
1/4-20 UNC female boss section, Unified basic profile: minor Ø4.975, pitch Ø5.525, major Ø6.350, 10.160 long (8 turns), outside Ø16 (same as the core-hole boss)
Exact dimensions. True size, no printing tolerance added. Threads are plain cylinders at the major diameter.
STEP STL free, Xem Studio Design License — Xem Studio
Dimensions
| thread | 1/4-20 UNC |
|---|---|
| major Ø (mm) | 6.35 |
| core hole Ø (mm) | 5.35 |
| boss (my design) | Ø16 × 10, hole 8 deep |
| from | DIN 4503-1 / ISO 1222 (Threading Tools Guide) |
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Camera tripod thread bosses: 1/4-20 UNC and 3/8-16 UNC: every size, notes, mating features and sources. What thread is a camera tripod screw?