The Setscrew, cataloged under National Stock Number 5305-01-133-0161, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Brunson Instrument Company Dba Brunson Instrument Company. Government technical data includes 11 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 | 5305-01-133-0161 |
| Primary Part Number | SS256CU2SS |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Brunson Instrument Company Dba Brunson Instrument Company |
| Status | ACTIVE |
| Fastener Length | 0.625 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN |
| Thread Length | 0.625 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.086 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | CUP |
| Internal Drive Style | SLOT |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 56 |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| SS256CU2SS PRIMARY | Brunson Instrument Company Dba Brunson Instrument Company (USA) |
NSN 5305-01-133-0161 is a Setscrew, manufactured by Brunson Instrument Company Dba Brunson Instrument Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-133-0161 has 1 manufacturer part number on file: SS256CU2SS (Brunson Instrument Company Dba Brunson Instrument Company).
Key specifications for SS256CU2SS: Fastener Length: 0.625 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN; Thread Length: 0.625 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.086 INCHES IN; Head Style: HEADLESS (SETSCREW). 11 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.