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MS21090-0412
Military Standard Machine Screw
Description
Fastener Length: 3/8", Thread: 4-40, Thread Length: 3/8", MS21090 series screw
Specifications
| Drive Style | Cross |
|---|---|
| Fastener Length | Between 0.344 inches and 0.375 inches |
| Hardness Rating | 26.0 rockwell c and 32.0 rockwell c |
| Head Diameter | Between 0.205 inches and 0.219 inches |
| Head Height | Between 0.070 inches and 0.080 inches |
| Head Style | Pan no 2 |
| Internal Drive Style | Cross recess type 1 |
| Length | 3/8 |
| Locking Feature | Patch threads or pellet threads or pellet threads or strip threads |
| Material | Steel |
| Material Specification | Ams 6300 assn standard 1st material response or mil-s-6050 military specification 2nd material response |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Class 3 federal specification single treatment response type 2 qq-p-416 |
| Thread Class | 2a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.344 inches and 0.375 inches |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series | UNC |
| Thread Series Designator | Unc (coarse thread) |
| Thread Size | 4 |
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS21090-0412. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error