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NAS4204U19
Bolt
Description
Fastener Length: 1-5/8", Thread: 1/4-28, Thread Length: 27/64"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 1.598 inches minimum and 1.628 inches maximum |
| Features Provided | Finished head |
| Grip Diameter | 0.249 inches minimum and 0.250 inches maximum |
| Grip Length | 1.178 inches minimum and 1.198 inches maximum |
| Head Diameter | 0.456 inches minimum and 0.508 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Tri-wing recess |
| Length | 1 5/8 |
| Material | Iron |
| Material Specification | Ams 5731 assn std single material response or ams 5737,uns k66286 assn std single material response |
| Nondefinitive Specification/Std Data | 1 class and a type and 3 table and 0.250-28 size |
| Specification Data | 80205-nas4003 professional/industrial association standard and 80205-nas4204/canceled/ professional/industrial association standard |
| Surface Finish | 125.0 microinches grip, 125.0 microinches top of head, 32.0 microinches bearing surface of head, 32.0 microinches threads |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.425 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS4204U12
- NAS4204U19
- NAS4204U26
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.
- BACB30NN4K19 BAC 1/4-28 · 0.073 in · Flat countersunk · Titanium
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error