The Washer,recessed, cataloged under National Stock Number 5310-01-360-4843, 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 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-360-4843 |
| Primary Part Number | BACW10BP41ACU |
| Item Name | Washer,recessed |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Style Designator | RECESSED |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.475 INCHES MINIMUM AND 0.495 INCHES MAXIMUM IN |
| Material Thickness | 0.057 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN |
| Recess Diameter | 0.332 INCHES MINIMUM AND 0.352 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | IRON ALLOY 660 OVERALL |
| Hole Diameter | 0.250 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN |
| Recess Angle | 45.0 DEGREES MINIMUM AND 50.0 DEGREES MAXIMUM |
| 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 |
|---|---|
| BACW10BP41ACU | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACW10BP41ACU | Anillo Industries Llc (USA) |
| BACW10BP41ACU | Moeller Manufacturing & Supply, Llc (USA) |
| Reference | Meaning |
|---|---|
| BACW10BP41ACU | 5/9 Secondary reference Mamco Mfg Co Inc |
| BACW10BP41ACU | 5/2 Secondary reference U.S. Government activity |
| BACW10BP41ACU | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-360-4843 is a Washer,recessed, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-360-4843 has 3 manufacturer part numbers on file: BACW10BP41ACU (Sps Technologies, Llc Dba PB Fasteners), BACW10BP41ACU (Anillo Industries Llc), BACW10BP41ACU (Moeller Manufacturing & Supply, Llc).
Key specifications for BACW10BP41ACU: Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Style Designator: RECESSED; Material Document and Classification: AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 0.475 INCHES MINIMUM AND 0.495 INCHES MAXIMUM IN. 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.