screws › socket head cap screws
NAS1635-4-16
Screw
Description
Fastener Length: 1-", Thread: 1/4-28, Thread Length: 0-63/64
Specifications
| Fastener Length | 1.000 |
|---|---|
| Head Diameter | 0.473 inches minimum and 0.492 inches maximum |
| Head Height | 0.162 inches minimum and 0.175 inches maximum |
| Head Style | Pan Head |
| Internal Drive Style | Cross recess type 1 |
| Material | Steel |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Screw Material | Steel comp 302 or steel comp 303 or steel comp 304 or steel comp 305 or steel comp 316 |
| Screw Material Specification | 66 fed std all material responses |
| Screw Surface Treatment | Passivate |
| Screw Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Thread Class | 2a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.929 inches minimum and 1.000 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS1635-4-6
- NAS1635-4-10
- NAS1635-4-12
- NAS1635-4-16
- NAS1635-4-28
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1635-4-16. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error