The Washer,concave, cataloged under National Stock Number 5310-00-182-4101, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-182-4101 |
| Primary Part Number | 68563W-08 |
| Item Name | Washer,concave |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Radius | 0.250 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN |
| Heat Treatment | AS FABRICATED |
| Style Designator | CONCAVE |
| Outside Diameter | 0.464 INCHES MINIMUM AND 0.474 INCHES MAXIMUM IN |
| Material Thickness | 0.058 INCHES MINIMUM AND 0.088 INCHES MAXIMUM IN |
| Recess Diameter | 0.265 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Hole Diameter | 0.315 INCHES MINIMUM AND 0.345 INCHES MAXIMUM 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 |
|---|---|
| 68563W-08 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| STSCA001B08 | 7/2 Vendor item drawing reference U.S. Government activity |
| 55-2935-04 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-182-4101 is a Washer,concave, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-182-4101 has 1 manufacturer part number on file: 68563W-08 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 68563W-08: Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Radius: 0.250 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN; Heat Treatment: AS FABRICATED; Style Designator: CONCAVE. 10 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.