The Washer,flat, cataloged under National Stock Number 5310-00-754-3121, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Gasket Manufacturing Co.. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-754-3121 |
| Primary Part Number | X16G7M2C9-1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Gasket Manufacturing Co. |
| Status | ACTIVE |
| Overall Diameter | 0.620 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 1020 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.462 INCHES MINIMUM AND 0.482 INCHES MAXIMUM IN |
| Thickness | 0.031 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 |
|---|---|
| X16G7M2C9-1 PRIMARY | Gasket Manufacturing Co. (USA) |
| 9021881 PRIMARY | Us Army Aviation and Missile Command (USA) |
NSN 5310-00-754-3121 is a Washer,flat, manufactured by Gasket Manufacturing Co., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-754-3121 has 2 manufacturer part numbers on file: X16G7M2C9-1 (Gasket Manufacturing Co.), 9021881 (Us Army Aviation and Missile Command).
Key specifications for X16G7M2C9-1: Overall Diameter: 0.620 INCHES NOMINAL IN; Material Document and Classification: QQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: CADMIUM OVERALL. 9 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.