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HT4024L4-21
Screw
Description
Fastener Length: 1-25/32", Thread: 1/4-28, Thread Length: 31/64"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 1.766 inches minimum and 1.796 inches maximum |
| Grip Diameter | 0.2490 inches minimum and 0.2495 inches maximum |
| Grip Length | 1.302 inches minimum and 1.322 inches maximum |
| Head Diameter | 0.389 inches minimum and 0.394 inches maximum |
| Head Height | 0.070 inches minimum and 0.074 inches maximum |
| Head Style | Fillister countersunk |
| Internal Drive Style | High-torque |
| Length | 1 25/32 |
| Material | Steel |
| Material Specification | Ams 5629 assn std single material response |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.444 inches minimum and 0.494 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
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.
- ST3M455-4L21-1 Other 1/4-28 · 0.073 in · Fillister countersunk · Steel
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Catalog data updated 2026-07-05. Report a data error