screws › close tolerance screws
NAS1189E04P6N
Close Tolerance Screw
Description
Fastener Length: 3/8", Thread: 4-40, Thread Length: 21/64
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 0.344 inches minimum and 0.375 inches maximum |
| Head Diameter | 0.177 inches minimum and 0.225 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Length | 3/8 |
| Locking Feature | Strip threads |
| Material | Iron |
| Material Specification | Ams 5737 assn std single material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Specification Data | 80205-nas1189 professional/industrial association standard |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | 0.249 inches minimum and 0.330 inches maximum |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series Designator | UNC |
| Thread Size | 4 |
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.
- NAS1189E04P6B NAS #4-40 · 3/8 in · Flat countersunk · Iron
- NAS1189E04P6L NAS #4-40 · 3/8 in · Flat countersunk · Iron
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Catalog data updated 2026-07-05. Report a data error