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MS21093-0619
Military Standard Machine Screw
Description
Fastener Length: 5/16", Thread: 6-32, Thread Length: 1/4
Specifications
| Countersink Angle | Between 99.0 degrees and 101.0 degrees |
|---|---|
| Departure From Cited Designator | As modified by locking feature |
| Fastener Length | Between 0.281 inches and 0.312 inches |
| Head Diameter | Between 0.249 inches and 0.279 inches |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Length | 5/16 |
| Locking Feature | Strip |
| Material | Steel |
| Min. Tensile Strength (psi) | 60000 pounds per square inch |
| Nondefinitive Specification/Std Data | 3 type and 3c 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 single treatment response |
| Thread Class | 2a |
| Thread Diameter | 0.138 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.159 inches and 0.261 inches |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series | UNC |
| Thread Series Designator | Unc (coarse thread) |
| Thread Size | 6 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
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.
- NAS1219-06-5 NAS #6-32 · 5/16 in · Flat countersunk · Steel
- NAS1219-06E5 NAS #6-32 · 5/16 in · Flat countersunk · Iron
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Catalog data updated 2026-07-05. Report a data error