screws › socket head cap screws
NAS1635-04LR4
Screw
Description
Fastener Length: 1/4", Thread: 4-40, Thread Length: 1/4
Specifications
| Fastener Length | 0.250 |
|---|---|
| Head Diameter | 0.205 inches minimum and 0.219 inches maximum |
| Head Height | 0.070 inches minimum and 0.080 inches maximum |
| Head Style | Pan Head |
| Internal Drive Style | Cross recess type 1 |
| Length | 1/4 |
| Locking Feature | Patch threads |
| Material | Steel |
| Surface Treatment | Passivate |
| Thread Class | 2a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | 0.250 |
| 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.
- NAS1635-04LR3
- NAS1635-04LR4
- NAS1635-04LR5
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.
- LL57D40P4 Other #4-40 · 1/4 in · Pan Head · Iron
- NAS1635-04LE4 NAS #4-40 · 1/4 in · Pan Head · Steel
- NAS1635-04LL4 NAS #4-40 · 1/4 in · Pan Head · Steel
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Catalog data updated 2026-07-05. Report a data error