The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-258-4614, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-258-4614 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Width Across Flats | 0.312 INCHES NOMINAL IN |
| Head Height | 0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Fastener Length | 1.240 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Thread Length | 1.115 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNRC |
| Head Diameter | 0.550 INCHES MINIMUM AND 0.562 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 |
|---|---|
| 61-620 | C/1 Advisory reference — outside the item-of-supply concept Cnh Industrial America Llc Dba Cnh America |
| FF-S-86E TYPE VI | 4/1 Identification reference U.S. Government activity |
| 3/8-16UNC-3AX1-1/4 | 5/9 Secondary reference All West Fasteners Incorporated Dba All-West Components and Fasteners |
| 3/8-16UNRC-3A 1-1/4 LG | 3/2 Design control — primary reference U.S. Government activity |
| 122-6938616 PC 62 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 122-6938615 PC 60 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 5305-01-258-4614 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5305-01-420-3599, 5120-01-537-6230. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-01-258-4614: Width Across Flats: 0.312 INCHES NOMINAL IN; Head Height: 0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Fastener Length: 1.240 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN; Thread Length: 1.115 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN. 15 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.