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NAS1204-15D
Close Tolerance Bolt
Description
Fastener Length: 1-17/64", Thread: 1/4-28, Thread Length: 21/64", NAS1204 series bolt
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Distance From Head Largest Bearing Surface To Shank Hole Center | 1.113 inches minimum first hole and 1.163 inches maximum first hole |
| Fastener Length | 1.239 inches minimum and 1.269 inches maximum |
| Grip Diameter | 0.2485 inches minimum and 0.2495 inches maximum |
| Grip Length | 0.923 inches minimum and 0.953 inches maximum |
| Hardness Rating | 36.0 rockwell c minimum and 40.0 rockwell c maximum |
| Head Diameter | 0.449 inches minimum and 0.507 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Length | 1 17/64 |
| 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 |
| Shank Unthreaded Hole Diameter | 0.076 inches minimum first hole and 0.086 inches maximum first hole |
| Specification Data | 80205-nas1204 professional/industrial association standard |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty 2 cl 3 fed spec all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.291 inches minimum and 0.341 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1204-15D. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error