The Washer,flat, cataloged under National Stock Number 5310-01-461-6933, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-461-6933 |
| Primary Part Number | 90131A102 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| 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 |
|---|---|
| 90131A102 | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 575R692H44 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Support Services Corp |
| 575R692H44 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5310-01-461-6933 is a Washer,flat, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-461-6933 has 1 manufacturer part number on file: 90131A102 (Mcmaster-Carr Supply Co).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-730-5567. Verify interchangeability with system specifications before substitution.
Key specifications for 90131A102: Special Features: ORIGINAL NAME WASHER REINFORCED RUBBER; End Item Identification: ASR 9,AIRPORT SURVEILLANCE RADAR9,DTFA-01-83-C-20027. 0 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.