The Washer,flat, cataloged under National Stock Number 5310-01-588-7325, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is O'gara-Hess & Eisenhardt Armoring Company Llc. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-588-7325 |
| Primary Part Number | 6437550-03M1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | O'gara-Hess & Eisenhardt Armoring Company Llc |
| Status | ACTIVE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.375 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 |
|---|---|
| 6437550-03M1 PRIMARY | O'gara-Hess & Eisenhardt Armoring Company Llc (USA) |
| 6437550-03M1 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| 6437550-03M1 | Amz Alabama Inc. (USA) |
| 6437550-03M1 PRIMARY | Bae Systems Land & Armaments L.p. (USA) |
| Reference | Meaning |
|---|---|
| 456720110602 | 6/9 Informative reference only Ncb Hungary (honvedsegi Egyseges Termekkod) |
| 6437550-03M1 | 3/9 Design control — primary reference Bae Systems Survivability Systems Llc |
NSN 5310-01-588-7325 is a Washer,flat, manufactured by O'gara-Hess & Eisenhardt Armoring Company Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-588-7325 has 4 manufacturer part numbers on file: 6437550-03M1 (O'gara-Hess & Eisenhardt Armoring Company Llc), 6437550-03M1 (Caterpillar Inc Div Caterpillar Defense), 6437550-03M1 (Amz Alabama Inc.), 6437550-03M1 (Bae Systems Land & Armaments L.p.).
Key specifications for 6437550-03M1: Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Part Name Assigned by Controlling Agency: WASHER, FLAT, TYPE 1 3/8 USS; End Item Identification: 2410-01-565-2603 TRACTOR, FULL TRACKED, LOW SPEED. 4 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.