The Washer,flat, cataloged under National Stock Number 5310-01-421-2057, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Johnson Controls Navy Systems, Llc. Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-421-2057 |
| Primary Part Number | 076-74481-000 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Johnson Controls Navy Systems, Llc |
| Status | ACTIVE |
| Overall Diameter | 2.125 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | PLASTIC POLYAMIDE NYLON OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 1.375 INCHES NOMINAL IN |
| Thickness | 0.250 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 |
|---|---|
| 076-74481-000 PRIMARY | Johnson Controls Navy Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| 476-64696-000-137 | 5/9 Secondary reference Johnson Controls Navy Systems, Llc |
| 076-74481A | 5/9 Secondary reference Johnson Controls Navy Systems, Llc |
NSN 5310-01-421-2057 is a Washer,flat, manufactured by Johnson Controls Navy Systems, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-421-2057 has 1 manufacturer part number on file: 076-74481-000 (Johnson Controls Navy Systems, Llc).
Key specifications for 076-74481-000: Overall Diameter: 2.125 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND; Material: PLASTIC POLYAMIDE NYLON OVERALL. 7 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.