The Setscrew, cataloged under National Stock Number 5305-01-161-5498, 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 14 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 | 5305-01-161-5498 |
| Primary Part Number | 2K2188 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Point Diameter | 0.500 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Point Length | 1.375 INCHES NOMINAL IN |
| Fastener Length | 2.000 INCHES NOMINAL IN |
| Hardness Rating | 50.0 ROCKWELL C MINIMUM OVERALL |
| Point Chamfer Angle | 30.0 DEGREES NOMINAL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Point Style | CHAMFER DOG |
| Width Between Flats | 0.938 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 11 |
| 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 |
|---|---|
| 2K2188 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5305-01-161-5498 is a Setscrew, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-161-5498 has 1 manufacturer part number on file: 2K2188 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 2K2188: Point Diameter: 0.500 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN; Point Length: 1.375 INCHES NOMINAL IN; Fastener Length: 2.000 INCHES NOMINAL IN; Hardness Rating: 50.0 ROCKWELL C MINIMUM OVERALL. 14 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.