screws › machine screws
ST3M505-4-13
Screw
Description
Fastener Length: 1-7/32", Thread: 1/4-28, Thread Length: 27/64"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 1.194 inches minimum and 1.224 inches maximum |
| Head Diameter | 0.497 inches minimum and 0.507 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | High-torque |
| Length | 1 7/32 |
| Material | Steel |
| Material Specification | Ams5629 assn std single material response |
| Shoulder Diameter | 0.2802 inches minimum first shoulder and 0.2807 inches maximum first shoulder |
| Shoulder Length | 0.707 inches minimum first shoulder and 0.727 inches maximum first shoulder |
| Shoulder Shape | Round first shoulder |
| Special Features | Internal hexagon socket in threaded 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 | 0.372 inches minimum and 0.422 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
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.
- HT4009-4-11 Other 1/4-28 · 0.073 in · Flat countersunk · Steel
- HT4009-4-13 Other 1/4-28 · 0.073 in · Flat countersunk · Steel
- ST3M505-4-10 Other 1/4-28 · 0.073 in · Flat countersunk · Steel
- ST3M505-4-11 Other 1/4-28 · 0.073 in · Flat countersunk · Steel
- ST3M505-4-12 Other 1/4-28 · 0.073 in · Flat countersunk · Steel
- ST3M505-4-16 Other 1/4-28 · 0.073 in · Flat countersunk · Steel
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Catalog data updated 2026-07-05. Report a data error