screws › socket head cap screws
NAS1352C04-20
Socket Head Cap Screw
Description
Fastener Length: 1-1/4", Thread: 4-40, Head Width: 3/32", Thread Length: 3/4"
Specifications
| Drive Style | Hexagon |
|---|---|
| Fastener Length | Between 1.210 inches and 1.250 inches |
| Hardness Rating | 80.0 rockwell b |
| Head Diameter | Between 0.176 inches and 0.183 inches |
| Head Height | Between 0.108 inches and 0.112 inches |
| Head Style | Flat chamfer |
| Internal Drive Style | Hexagon |
| Length | 1 1/4 |
| Material | Steel |
| Material Specification | 66 federal standard single material response |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Minimum Yield Strength | 30000 pounds per square inch |
| Specification Data | 80205-nas1352 professional/industrial association standard |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 federal specification single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | 0.750 |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series | UNRC |
| Thread Series Designator | UNRC |
| Thread Size | 4 |
| Width Across Flats | Between 0.094 inches and 0.095 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
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.
- NAS1352-04-18P NAS #4-40 · 0.073 in · Flat chamfer · Steel
- NAS1352-04LL16 NAS #4-40 · 0.073 in · Flat chamfer · Steel
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Catalog data updated 2026-07-05. Report a data error