The Washer,convex, cataloged under National Stock Number 5310-01-376-0778, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Walker Power Systems, Inc. Dba Tiernay Turbines. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-376-0778 |
| Primary Part Number | 212778-1 |
| Item Name | Washer,convex |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Walker Power Systems, Inc. Dba Tiernay Turbines |
| Status | ACTIVE |
| Outside Diameter | 1.281 INCHES NOMINAL IN |
| Material Thickness | 0.219 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Hole Diameter | 0.344 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 |
NSN 5310-01-376-0778 is a Washer,convex, manufactured by Walker Power Systems, Inc. Dba Tiernay Turbines, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-376-0778 has 2 manufacturer part numbers on file: 212778-1 (Walker Power Systems, Inc. Dba Tiernay Turbines), 368230 (A.i. Group).
1 possible match (shared part number, not a government interchangeability claim): 5920-01-425-2754. Verify interchangeability with system specifications before substitution.
Key specifications for 212778-1: Outside Diameter: 1.281 INCHES NOMINAL IN; Material Thickness: 0.219 INCHES NOMINAL IN; Material: STEEL OVERALL; Hole Diameter: 0.344 INCHES NOMINAL IN. 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.