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MS51849-11C
Military Standard Machine Screw
Description
Fastener Length: 1/4", Thread: 4-40, Thread Length: 1/4", MS51849 series screw
Specifications
| Fastener Length | Between 0.220 inches and 0.250 inches |
|---|---|
| Head Height | Between 0.049 inches and 0.060 inches |
| Head Style | Hexagon Head |
| Internal Drive Style | Slot |
| Length | 1/4 |
| Material | Steel |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Screw Material | Steel comp 302 or steel comp 303 or steel comp 303se or steel comp 304 or steel comp 304l or steel comp 305 or steel comp 309 or steel comp 310 or steel comp 316 or steel comp 316l or steel comp 317 or steel comp 321 or steel comp 347 |
| Screw Material Specification | Qq-s-763 federal specification all material responses or fed-std66 federal standard all material responses |
| Screw Surface Treatment | Passivate |
| Screw Surface Treatment Specification | Astm a380 assn standard single treatment response |
| 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 | UNC |
| Thread Series Designator | Unc (coarse thread) |
| Thread Size | 4 |
| Width Between Flats | Between 0.181 inches and 0.187 inches |
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.
- NAS1801-04-4 NAS #4-40 · 1/4 in · Hexagon Head · Steel
- MS51849-11 MS #4-40 · 1/4 in · Hexagon Head · Steel
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Catalog data updated 2026-07-05. Report a data error