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MS51960-87
Flat Countersunk Head Machine Screw
Description
MS 51960-87 Phillips Flat Head Machine Screw - 82 Degree
Specifications
| Countersink Angle | 80.0 degrees minimum and 82.0 degrees maximum |
|---|---|
| Fastener Length | 1.250 |
| Finish | Passivate per QQ-P-35 |
| Head Diameter | 0.452 inches minimum and 0.507 inches maximum |
| Head Style | Flat countersunk, Phillips Flat Head |
| Internal Drive Style | Cross recess type 1 |
| Length | 1 1/4 |
| Material | CRES |
| Min. Tensile Strength (psi) | 80000 pounds per square inch |
| Screw Material | Steel comp 302 or steel comp 303 or steel comp 304 or steel comp 305 or steel comp 316 |
| Screw Material Specification | 66 fed std all material responses |
| Screw Surface Treatment | Passivate |
| Screw Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Size | 1/4-28 |
| Thread Class | 2a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Fraction | 1/4-28 |
| Thread Length | 1.179 inches minimum and 1.250 inches maximum |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Type | N.F. - Fine, UNC-2A |
Cross-reference
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Catalog data updated 2026-07-05. Report a data error