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ST3M505-4-7
Machine Screw
Description
Fastener Length: 27/32", Thread: 1/4-28, Thread Length: 27/64
Specifications
| Countersink Angle | Between 99.0 degrees and 101.0 degrees |
|---|---|
| End Application | Harrier av-8b hornet f/a-18;aircraft eagle f-15;aircraft hornet f/a-18;aircraft fms - aircraft |
| Fastener Length | Between 0.820 inches and 0.850 inches |
| Head Diameter | Between 0.497 inches and 0.507 inches |
| Head Style | Flat countersunk |
| Internal Drive Style | High-torque |
| Material | Steel |
| Material Specification | Ams5629 assn standard single material response |
| Shoulder Diameter | 0.2802 inches first shoulder and 0.2807 inches first shoulder |
| Shoulder Length | 0.333 inches first shoulder and 0.353 inches first shoulder |
| Shoulder Shape | Round first shoulder |
| Special Features | Internal hexagon socket in thread end 0.0947 in. min and 0.0967 in. max width across flats |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.372 inches and 0.422 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 1/4 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for ST3M505-4-7. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error