screws › machine screws
MS51849-11
Military Standard Machine Screw
Description
Fastener Length: 1/4", Thread: 4-40, Thread Length: 1/4
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) | 60000 pounds per square inch |
| Nondefinitive Specification/Std Data | 1 type and 10s style |
| Screw Material | Steel |
| Screw Material Specification | Qq-s-634 federal specification single material response or qq-s-637 federal specification single material response or 66 federal standard single material response |
| Screw Surface Treatment | Cadmium and chromate |
| Screw Surface Treatment Specification | Qq-p-416 type 2 cl 3 federal specification all treatment responses |
| Thread Class | 2a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.170 inches and 0.250 inches |
| 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
- MS51849-11C MS #4-40 · 1/4 in · Hexagon Head · Steel
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error