The Washer,flat, cataloged under National Stock Number 5310-01-540-2211, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Metric and Multistandard Components Corp. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-540-2211 |
| Primary Part Number | 125-A2-M4 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Metric and Multistandard Components Corp |
| Status | ACTIVE |
| Overall Diameter | 9.0 MILLIMETERS NOMINAL MM |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | ZINC OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 304 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 4.3 MILLIMETERS NOMINAL MM |
| Thickness | 0.8 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| DIN125-A2-M4 | D. B. Roberts, Inc. Dba Db Roberts Inc (USA) |
| 125-A2-M4 PRIMARY | Metric and Multistandard Components Corp (USA) |
| DIN 125-A-M4 | D. B. Roberts, Inc. Dba Db Roberts Inc (USA) |
NSN 5310-01-540-2211 is a Washer,flat, manufactured by Metric and Multistandard Components Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-540-2211 has 3 manufacturer part numbers on file: DIN125-A2-M4 (D. B. Roberts, Inc. Dba Db Roberts Inc), 125-A2-M4 (Metric and Multistandard Components Corp), DIN 125-A-M4 (D. B. Roberts, Inc. Dba Db Roberts Inc).
Key specifications for 125-A2-M4: Overall Diameter: 9.0 MILLIMETERS NOMINAL MM; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: ZINC OVERALL; Peripheral Shape Style: ROUND. 8 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.