bolts › internal wrenching bolts
MS20004-39
Military Standard Internal Wrenching Bolt
Description
Fastener Length: 2-29/32", Thread: 1/4-28, Head Width: 3/16", Thread Length: 15/32
Specifications
| Drive Style | Hexagon |
|---|---|
| Fastener Length | 2.912 |
| Hardness Rating | 34.0 rockwell c and 40.0 rockwell c |
| Head Diameter | Between 0.428 inches and 0.438 inches |
| Head Height | 0.250 |
| Head Style | Bevel-conical |
| Internal Drive Style | Hexagon |
| Material | Steel |
| Surface Treatment | Chromate and cadmium |
| Surface Treatment Specification | Cls 2 federal specification single treatment response ty ii qq-p-416 |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.475 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 1/4 |
| Width Across Flats | Between 0.188 inches and 0.190 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS20004-39. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error