bolts › close tolerance bolts
NAS1221R04E1
Bolt
Description
Fastener Length: 19/64", Thread: 4-40, Thread Length: 7/32
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 0.280 inches minimum and 0.310 inches maximum |
| Head Diameter | 0.194 inches minimum and 0.225 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Torque-set ribbed |
| Length | 19/64 |
| Material | Iron |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Screw Material | Iron alloy 660 |
| Screw Material Specification | Ams5731 assn std single material response or ams5732 assn std single material response or ams5737 assn std single material response |
| Screw Surface Treatment | Passivate |
| Screw Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Specification Data | 80205-nas1221 professional/industrial association standard |
| Thread Class | 3a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | 0.232 |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series Designator | UNJC |
| Thread Size | 4 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS1221R04E1
- NAS1221R04E2
- NAS1221R04E4
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1221R04E1. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error