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MS16998-61L
Military Standard Machine Screw
Description
Fastener Length: 1-1/2", Thread: 1/4-24, Head Width: 1/4", Thread Length: 1-1/2"
Specifications
| Fastener Length | 1.460 inches minimum and 1.500 inches maximum |
|---|---|
| Hardness Rating | 38.0 rockwell c minimum and 45.0 rockwell c maximum |
| Head Diameter | 0.4570 inches minimum and 0.4688 inches maximum |
| Head Height | 0.3060 inches minimum and 0.3125 inches maximum |
| Head Style | Flat chamfer |
| Internal Drive Style | Hexagon |
| Length | 1 1/2 |
| Locking Feature | Strip threads or patch threads |
| Material | Steel |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Minimum Yield Strength | 150000 pounds per square inch |
| Nondefinitive Specification/Std Data | 6 type |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,type 2 class 3 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 1.377 inches minimum and 1.500 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Across Flats | 0.250 inches minimum and 0.253 inches maximum |
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS16998-61L. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error