screws › machine screws
MS51959-5B
Military Standard Machine Screw
Description
Fastener Length: 3/8", Thread: 2-56, Thread Length: 5/16", flat head, MS51959 series screw
Specifications
| Countersink Angle | 80.0 degrees minimum and 82.0 degrees maximum |
|---|---|
| Fastener Length | 0.344 inches minimum and 0.375 inches maximum |
| Head Diameter | 0.147 inches minimum and 0.172 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Length | 3/8 |
| Material | Steel |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Nondefinitive Specification/Std Data | 3 type and 2c style |
| Screw Material | Steel comp 301 or steel comp 302 or steel comp 302b or steel comp 303 or steel comp 303se or steel comp 303 plus x or steel comp 303 or steel comp 304 or steel comp 304l or steel comp 305 or steel comp 308 or steel comp 309 or steel comp 309s or steel comp 310 or steel comp 310s or steel comp 314 or steel comp 316 or steel comp 316l or steel comp 317 or steel comp 321 or steel comp 323 or steel comp 324 or steel comp 347 or steel comp 348 or steel comp 384 or steel comp 385 |
| Screw Material Specification | Qq-s-763,300 series fed spec 1st material response or 66,300 series fed std 1st material response or comp 16-18 or 18-8 assn std 2nd material response |
| Thread Class | 2a |
| Thread Diameter | 0.086 |
| Thread Direction | Right-hand |
| Thread Length | 0.257 inches minimum and 0.324 inches maximum |
| Thread Qty | 56 |
| Thread Qty Per Inch (tpi) | 56 |
| Thread Series Designator | UNC |
| Thread Size | 2 |
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS51959-5B. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error