bolts › internal wrenching bolts
MS20008-42
Bolt
Description
Fastener Length: 3-7/16", Thread: 1/2-20, Head Width: 3/8", Thread Length: 51/64"
Specifications
| Country of Origin | USA |
|---|---|
| Fastener Length | 3.423 inches minimum and 3.453 inches maximum |
| Hardness Rating | 34.0 rockwell c minimum and 40.0 rockwell c maximum |
| Head Diameter | 0.818 inches minimum and 0.828 inches maximum |
| Head Height | 0.500 |
| Head Style | Bevel-conical |
| Internal Drive Style | Hexagon |
| Length | 3 29/64 |
| 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 |
| NIIN | 00-584-6736 |
| NSN | 5306-00-584-6736 |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty 2 cl 3 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.500 |
| Thread Direction | Right-hand |
| Thread Length | 0.787 inches minimum and 0.837 inches maximum |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series Designator | UNF |
| Thread Size | 1/2 |
| Weight | .005 lb |
| Width Across Flats | 0.375 inches minimum and 0.378 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- MS20008-40 MS 1/2-20 · 0.099 in · Bevel-conical · Steel
- MS20008-44 MS 1/2-20 · 0.099 in · Bevel-conical · Steel
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Catalog data updated 2026-07-05. Report a data error