bolts › internal wrenching bolts
MS20006H57
Military Standard Internal Wrenching Bolt
Description
Fastener Length: 4-1/4", Hole Diameter: 1/16", Thread: 3/8-24, Head Width: 5/16", Thread Length: 43/64
Specifications
| Fastener Length | 4.235 inches minimum and 4.265 inches maximum |
|---|---|
| Hardness Rating | 34.0 rockwell c minimum and 40.0 rockwell c maximum |
| Head Diameter | 0.639 inches minimum and 0.679 inches maximum |
| Head Height | 0.375 |
| Hole Configuration Style | Round longitudinal hole |
| Hole Diameter | 0.055 |
| Hole Quantity | 4 |
| Hole Type | Drilled |
| Internal Drive Style | Hexagon |
| Length | 4 1/4 |
| Material | Steel |
| Material Specification | Mil-s-5626 mil spec 1st material response or mil-s-5000 mil spec 2nd material response or mil-s-8503 mil spec 3rd material response or mil-s-6098 mil spec 4th material response or mil-s-6049 mil spec 5th material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,type 2 cl 3 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.375 |
| Thread Direction | Right-hand |
| Thread Length | 0.662 inches minimum and 0.712 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 3/8 |
| Width Across Flats | 0.313 inches minimum and 0.315 inches maximum |
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 MS20006H57. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error