screws › close tolerance screws
NAS1580C5T9
Close Tolerance Screw
Description
Fastener Length: 1-5/64", Thread: 1/4-24, Thread Length: 1/2"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 1.048 inches minimum and 1.078 inches maximum |
| Grip Diameter | 0.3115 inches minimum and 0.3120 inches maximum |
| Grip Length | 0.552 inches minimum and 0.572 inches maximum |
| Hardness Rating | 36.0 rockwell c minimum and 40.0 rockwell c maximum |
| Head Diameter | 0.578 inches minimum and 0.633 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Offset cruciform (torque set) |
| Length | 1 5/64 |
| Material | Iron |
| Material Specification | Ams 5731 assn std single material response or ams 5732 assn std single material response or ams5737 assn std single material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Specification Data | 80205-nas1580 professional/industrial association standard |
| Surface Finish | 32.0 microinches grip32.0 microinches threads |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.501 |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| 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.
- NAS1580C5T9
- NAS1580C5T10
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.
- BACB30LU5-9 BAC 1/4-24 · 0.073 in · Flat countersunk · Steel
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Catalog data updated 2026-07-05. Report a data error