screws › machine screws
MS51959-13B
Military Standard Machine Screw
Description
Fastener Length: 1/4", Thread: 4-40, Thread Length: 11/64", black oxide
Specifications
| Countersink Angle | Between 80.0 degrees and 82.0 degrees |
|---|---|
| Departure From Cited Designator | As modified by finish |
| Drive Style | Cross |
| Fastener Length | Between 0.219 inches and 0.250 inches |
| Head Diameter | Between 0.195 inches and 0.225 inches |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Length | 1/4 |
| Material | CRES |
| Material Specification | 300 series federal standard 1st material response or comp 16-18 or 18-8 assn standard 2nd material response 300 series federal specification 1st material response or 66 qq-s-763 |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Nondefinitive Specification/Std Data | 3 type and 2c style |
| Surface Treatment | Oxide |
| Surface Treatment Specification | Cl 4 military specification single treatment response mil-c-13924 |
| Thread Class | 2a |
| Thread Diameter | 0.112 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.102 inches and 0.183 inches |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series | UNC |
| Thread Series Designator | Unc (coarse thread) |
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS51959-13B. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error