bolts › internal wrenching bolts
MS20004-6
Bolt
Description
Bolt
Specifications
| Country of Origin | USA |
|---|---|
| Drive Style | Hexagon |
| Fastener Length | Between 0.860 inches and 0.890 inches |
| Features | Internal Wrenching |
| Grip | 0.375 in |
| Grip Tolerance | ±0.010 in |
| Hardness Rating | 34.0 rockwell c and 40.0 rockwell c |
| Head Diameter | Between 0.428 inches and 0.438 inches |
| Head Height | 0.25 |
| Head Style | Bevel-conical |
| Head Type | Key Locking |
| Industry Standards/Certification | MS20004 |
| Internal Drive Style | Hexagon |
| Length | 7/8 |
| Material | Steel |
| Material Specification | Mil-s-5626 military specification 1st material response or mil-s-5000 military specification 2nd material response or mil-s-8503 military specification 3rd material response or mil-s-6098 military specification 4th material response or mil-s-6049 military specification 5th material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| NIIN | 00-550-0202 |
| NSN | 5306-00-550-0202 |
| Suggested Nuts for the Bolts | 42FLW |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 type 2 cl 3 federal specification single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.475 inches and 0.525 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 1/4-28 |
| Total Length | 0.875 in |
| Weight | 0.02 lb |
| 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 MS20004-6. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error