The Screw,assembled Washer, cataloged under National Stock Number 5305-01-225-2106, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Liberty Fastener Co. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-225-2106 |
| Primary Part Number | 455176 |
| Item Name | Screw,assembled Washer |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Liberty Fastener Co |
| Status | ACTIVE |
| Head Height | 0.139 INCHES MINIMUM AND 0.151 INCHES MAXIMUM IN |
| Fastener Length | 0.750 INCHES NOMINAL IN |
| Primary Washer Outside Diameter | 0.396 INCHES MINIMUM AND 0.408 INCHES MAXIMUM IN |
| Thread Length | 0.667 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Material Document and Classification | GM 275-M,FSCM 21450 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.216 INCHES IN |
| Head Style | PAN |
| Primary Washer Style | FLAT INTERNAL TEETH |
| Thread Direction | RIGHT-HAND |
| Primary Washer Material Thickness | 0.020 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Washer Quantity | 1 |
| Head Diameter | 0.407 INCHES MINIMUM AND 0.425 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 455176 | Liberty Fastener Co (USA) |
| Reference | Meaning |
|---|---|
| 455176 | 5/9 Secondary reference Army Weapons Command Attn Amswe-Ree-S |
| 455176 | 3/9 Design control — primary reference Rolls-Royce Corporation |
NSN 5305-01-225-2106 is a Screw,assembled Washer, manufactured by Liberty Fastener Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-225-2106 has 1 manufacturer part number on file: 455176 (Liberty Fastener Co).
2 possible matches (shared part number, not a government interchangeability claim): 5305-01-242-5953, 5998-01-357-8337. Verify interchangeability with system specifications before substitution.
Key specifications for 455176: Head Height: 0.139 INCHES MINIMUM AND 0.151 INCHES MAXIMUM IN; Fastener Length: 0.750 INCHES NOMINAL IN; Primary Washer Outside Diameter: 0.396 INCHES MINIMUM AND 0.408 INCHES MAXIMUM IN; Thread Length: 0.667 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN. 18 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.