The Washer,concave, cataloged under National Stock Number 5310-01-671-2298, 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 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-671-2298 |
| Primary Part Number | BACW10AU6 |
| 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,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Radius | 0.440 INCHES NOMINAL IN |
| Style Designator | CONCAVE |
| Outside Diameter | 0.785 INCHES NOMINAL IN |
| Recess Depth | 0.175 INCHES NOMINAL IN |
| Material Thickness | 0.076 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL COMP 8740 OVERALL |
| Hole Diameter | 0.534 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 |
|---|---|
| BACW10AU6 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACW10AU6 | Huck International, Inc (USA) |
| BACW10AU6 | Anillo Industries Llc (USA) |
| BACW10AU6 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| BACW10AU6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-671-2298 is a Washer,concave, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-671-2298 has 4 manufacturer part numbers on file: BACW10AU6 (Sps Technologies, Llc Dba PB Fasteners), BACW10AU6 (Huck International, Inc), BACW10AU6 (Anillo Industries Llc), BACW10AU6 (Howmet Global Fastening Systems Inc).
Key specifications for BACW10AU6: Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Radius: 0.440 INCHES NOMINAL IN; Style Designator: CONCAVE; Outside Diameter: 0.785 INCHES NOMINAL IN. 9 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.