The Setscrew, cataloged under National Stock Number 5305-00-263-3548, 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 17 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-263-3548 |
| Primary Part Number | 2A1139 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Point Diameter | 0.609 INCHES NOMINAL IN |
| Head Height | 0.562 INCHES NOMINAL IN |
| Point Length | 0.562 INCHES NOMINAL IN |
| Fastener Length | 1.500 INCHES NOMINAL IN |
| Thread Length | 0.938 INCHES MINIMUM IN |
| Hardness Rating | 30.0 ROCKWELL C NOMINAL OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Point Style | CHAMFER DOG |
| Width Between Flats | 1.125 INCHES NOMINAL IN |
| Minimum Yield Strength | 140000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 10 |
| Material | STEEL COMP E52100 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 |
|---|---|
| 2A1139 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5305-00-263-3548 is a Setscrew, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-263-3548 has 1 manufacturer part number on file: 2A1139 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 2A1139: Point Diameter: 0.609 INCHES NOMINAL IN; Head Height: 0.562 INCHES NOMINAL IN; Point Length: 0.562 INCHES NOMINAL IN; Fastener Length: 1.500 INCHES NOMINAL IN. 17 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.