The Setscrew, cataloged under National Stock Number 5305-01-125-1189, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is H-K Connecticut Holding Company. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-125-1189 |
| Primary Part Number | A3318 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | H-K Connecticut Holding Company |
| Status | ACTIVE |
| Point Diameter | 0.083 INCHES MINIMUM AND 0.092 INCHES MAXIMUM IN |
| Width Across Flats | 0.062 INCHES NOMINAL IN |
| Point Length | 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Fastener Length | 1.865 INCHES MINIMUM AND 1.885 INCHES MAXIMUM IN |
| Hardness Rating | 48.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | BALL |
| Surface Treatment | OXIDE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 4037 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 |
NSN 5305-01-125-1189 is a Setscrew, manufactured by H-K Connecticut Holding Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-125-1189 has 2 manufacturer part numbers on file: A3318 (H-K Connecticut Holding Company), A3318 (Printronix Inc).
1 possible match (shared part number, not a government interchangeability claim): 2910-01-731-3800. Verify interchangeability with system specifications before substitution.
Key specifications for A3318: Point Diameter: 0.083 INCHES MINIMUM AND 0.092 INCHES MAXIMUM IN; Width Across Flats: 0.062 INCHES NOMINAL IN; Point Length: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN; Fastener Length: 1.865 INCHES MINIMUM AND 1.885 INCHES MAXIMUM IN. 16 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.