The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-293-8766, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-293-8766 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Width Across Flats | 0.375 INCHES NOMINAL IN |
| Head Height | 0.430 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Fastener Length | 1.190 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Thread Length | 1.090 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| Hole Configuration Style | ROUND INTERNAL HEXAGON |
| Material Document and Classification | ASTM A574 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | 6 TYPE |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL UNS K03104 OVERALL |
| Hole Quantity | 2 |
| Thread Series Designator | UNF |
| Hole Type | DRILLED |
| Hole Diameter | 0.061 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN |
| Head Diameter | 0.642 INCHES MINIMUM AND 0.656 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| FF-S-86 | 4/1 Identification reference U.S. Government activity |
| 7/16-20 UNF-3AX1-1/4 IN. LG STL | 3/1 Design control — primary reference U.S. Government activity |
NSN 5305-01-293-8766 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-293-8766: Width Across Flats: 0.375 INCHES NOMINAL IN; Head Height: 0.430 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN; Fastener Length: 1.190 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN; Thread Length: 1.090 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN. 21 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.