The Washer,flat, cataloged under National Stock Number 5310-01-673-9139, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Brennan Industries. Government technical data includes 2 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 | 5310-01-673-9139 |
| Primary Part Number | 9900-20 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Brennan Industries |
| Status | ACTIVE |
| Overall Diameter | 2.063 INCHES NOMINAL IN |
| Hole Diameter | 1.699 INCHES NOMINAL 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 |
|---|---|
| 9900-20 PRIMARY | Brennan Industries (USA) |
NSN 5310-01-673-9139 is a Washer,flat, manufactured by Brennan Industries, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-673-9139 has 1 manufacturer part number on file: 9900-20 (Brennan Industries).
Key specifications for 9900-20: Overall Diameter: 2.063 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: BRITISH BONDED SEAL; End Item Identification: MCRRS DAY BOX; Hole Diameter: 1.699 INCHES NOMINAL IN. 2 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.