The Washer,flat, cataloged under National Stock Number 5310-00-397-9776, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Zenith Fuel Systems Llc. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-397-9776 |
| Primary Part Number | T52-53 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Zenith Fuel Systems Llc |
| Status | ACTIVE |
| Overall Diameter | 0.445 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | CADMIUM OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.281 INCHES MINIMUM AND 0.286 INCHES MAXIMUM IN |
| Thickness | 0.030 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 |
|---|---|
| T52-53 PRIMARY | Zenith Fuel Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| CT52-53 | 5/9 Secondary reference Bendix Corp the |
NSN 5310-00-397-9776 is a Washer,flat, manufactured by Zenith Fuel Systems Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-397-9776 has 1 manufacturer part number on file: T52-53 (Zenith Fuel Systems Llc).
Key specifications for T52-53: Overall Diameter: 0.445 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Surface Treatment: CADMIUM 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.