screws › socket head cap screws
MS21090-0415
Military Standard Screwlock
Description
Fastener Length: 5/8", Thread: 4-40, Thread Length: 5/8"
Specifications
| Departure From Cited Designator | As modified by self-locking feature and material |
|---|---|
| Fastener Length | 0.594 inches minimum and 0.625 inches maximum |
| 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 | 5/8 |
| Locking Feature | Pellet threads or strip threads |
| Material | Steel |
| Material Specification | 66 fed std single material response |
| Min. Tensile Strength (psi) | 60000 pounds per square inch |
| Nondefinitive Specification/Std Data | 3 type and 9c style |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty 2 cl 3 fed spec single treatment response |
| Thread Class | 2a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | 0.544 inches minimum and 0.625 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.
- MS21090-0415
- MS21090-0416
- MS21090-0417
- MS21090-0632
- MS21090-689
- MS21090-0840
- MS21090-0841
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS21090-0415. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error