The Washer,flat, cataloged under National Stock Number 5310-01-123-8491, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Triumph Actuation Systems - Connecticut, Llc. 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 | 5310-01-123-8491 |
| Primary Part Number | 4202044-1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Triumph Actuation Systems - Connecticut, Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | PS13145,FSCM 33068 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 1.880 INCHES NOMINAL IN |
| Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 440C OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.400 INCHES NOMINAL IN |
| Thickness | 0.029 INCHES MINIMUM AND 0.031 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 |
|---|---|
| 4202044-1 PRIMARY | Triumph Actuation Systems - Connecticut, Llc (USA) |
NSN 5310-01-123-8491 is a Washer,flat, manufactured by Triumph Actuation Systems - Connecticut, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-123-8491 has 1 manufacturer part number on file: 4202044-1 (Triumph Actuation Systems - Connecticut, Llc).
Key specifications for 4202044-1: Surface Treatment Document and Classification: PS13145,FSCM 33068 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 1.880 INCHES NOMINAL IN; Hardness Rating: 58.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM; Material Document and Classification: QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.