The Setscrew, cataloged under National Stock Number 5305-01-107-4151, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 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 | 5305-01-107-4151 |
| Primary Part Number | 4N54 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Fastener Length | 1.375 INCHES NOMINAL IN |
| Thread Length | 1.277 INCHES MINIMUM AND 1.317 INCHES MAXIMUM IN |
| Hardness Rating | 15.0 ROCKWELL SUPERFICIAL 15-N MINIMUM OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | FULL DOG |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4N54 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5305-01-107-4151 is a Setscrew, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-107-4151 has 1 manufacturer part number on file: 4N54 (Caterpillar Inc Div Caterpillar Defense).
4 possible matches (shared part number, not a government interchangeability claim): 5980-01-170-1578, 5980-01-198-2068, 5980-01-315-6433. Verify interchangeability with system specifications before substitution.
Key specifications for 4N54: Fastener Length: 1.375 INCHES NOMINAL IN; Thread Length: 1.277 INCHES MINIMUM AND 1.317 INCHES MAXIMUM IN; Hardness Rating: 15.0 ROCKWELL SUPERFICIAL 15-N MINIMUM OVERALL; Nominal Thread Diameter: 0.312 INCHES IN. 12 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.