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GS551P4-921
Screw
Description
Fastener Length: 1-9/32", Thread: 1/4-28, Thread Length: 27/64"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees |
|---|---|
| Fastener Length | 1.266 inches minimum and 1.296 inches maximum |
| Head Diameter | 0.357 |
| Head Style | Flat countersunk |
| Internal Drive Style | Slot |
| Length | 1 9/32 |
| Material | Steel |
| Shoulder Diameter | 0.254 inches minimum first shoulder and 0.256 inches maximum first shoulder |
| Shoulder Length | 0.796 inches minimum first shoulder and 0.826 inches maximum first shoulder |
| Shoulder Shape | Round first shoulder |
| Special Features | Half of top surface of head painted orange |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,type 2,class 3 fed spec single treatment response |
| Thread Class | 2a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.406 inches minimum and 0.436 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- GS551P4-741
- GS551P4-801
- GS551P4-921
Cross-reference
No interchangeable or dimensionally similar parts are on record for GS551P4-921. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error