The Washer,flat, cataloged under National Stock Number 5310-01-204-2167, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Parker Hannifin Corporation Div Cylinder Division. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Washer,flat |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Oshkosh Defense Llc (CAGE 75Q65); Parker Hannifin Corporation Div Cylinder Division (CAGE 13829); Mcmaster-Carr Supply Co (CAGE 39428) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-204-2167 |
| Primary Part Number | 391-3782-081 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Parker Hannifin Corporation Div Cylinder Division |
| Status | ACTIVE |
| 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 |
|---|---|
| 2AT995 | Oshkosh Defense Llc (USA) |
| 391-3782-081 PRIMARY | Parker Hannifin Corporation Div Cylinder Division (USA) |
| 90126A029 | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 2AT995 | 5/9 Secondary reference Oshkosh Corp |
NSN 5310-01-204-2167 is a Washer,flat, manufactured by Parker Hannifin Corporation Div Cylinder Division, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-204-2167 has 3 manufacturer part numbers on file: 2AT995 (Oshkosh Defense Llc), 391-3782-081 (Parker Hannifin Corporation Div Cylinder Division), 90126A029 (Mcmaster-Carr Supply Co).
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-611-2334, 2530-01-698-2045. Verify interchangeability with system specifications before substitution.
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.