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NAS428H4-12
Machine Bolt
Description
Fastener Length: 1-5/16", Hole Diameter: 1/32", Thread: 1/4-28, Thread Length: 1-9/32", NAS428 series bolt
Specifications
| Fastener Length | 1.250 inches minimum and 1.312 inches maximum |
|---|---|
| Features Provided | Finished head |
| Grip Length | 0.031 inches minimum and 0.062 inches maximum |
| Hardness Rating | 26.0 rockwell c minimum and 32.0 rockwell c maximum |
| Head Height | 0.131 inches minimum and 0.151 inches maximum |
| Head Style | Crowned hexagon |
| Hole Configuration Style | Hexagon flats |
| Hole Diameter | 0.046 |
| Hole Quantity | 1 |
| Hole Type | Drilled |
| Length | 1 5/16 |
| Material | Steel |
| Material Specification | Mil-s-5626 mil spec 1st material response or mil-s-6049 mil spec 2nd material response or mil-s-6050 mil spec 3rd material response or mil-s-6098 mil spec 4th material response or mil-s-6758 mil spec 5th material response or ams assn std 6th material response |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Specification Data | 80205-nas428 professional/industrial association standard |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,type 2,class 3 fed spec all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 1.188 inches minimum and 1.281 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Between Flats | 0.428 inches minimum and 0.440 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS428H4-5
- NAS428H4-12
- NAS428H4-16
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS428H4-12. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error