screws › close tolerance screws
HT4028L4-9
Screw
Description
Thread: 1/4-28, Thread Length: 1/2"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 1.016 inches minimum and 1.046 inches maximum |
| Grip Diameter | 0.2490 inches minimum and 0.2495 inches maximum |
| Grip Length | 0.552 inches minimum and 0.572 inches maximum |
| Head Diameter | 0.389 inches minimum and 0.394 inches maximum |
| Head Style | Oval countersunk |
| Internal Drive Style | High-torque |
| Length | 1 1/32 |
| Material | Titanium |
| Material Specification | Ams 4928 assn std single material response or ams 4967 assn std single material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Surface Finish | 32.0 microinches grip, 32.0 microinches threads |
| 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 | UNF |
| 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.
- 3M926-4L9 Commercial 1/4-28 · 0.073 in · Oval countersunk · Steel
- HT4068-4-9A Other 1/4-28 · 0.073 in · Oval countersunk · Steel
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Catalog data updated 2026-07-05. Report a data error