The Washer,flat, cataloged under National Stock Number 5310-01-049-1280, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Anillo Industries Llc. Government technical data includes 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-049-1280 |
| Primary Part Number | BACW10BN42P |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Anillo Industries Llc |
| Status | ACTIVE |
| Overall Diameter | 0.475 INCHES MINIMUM AND 0.495 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Specification/standard Data | 81205-BACW10BN MANUFACTURERS STANDARD |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 4130 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.282 INCHES MINIMUM AND 0.293 INCHES MAXIMUM IN |
| Thickness | 0.057 INCHES MINIMUM AND 0.069 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 |
|---|---|
| BACW10BN42P | Anillo Industries Llc (USA) |
| BACW10BN42P | West Coast Lockwasher Co., Inc. Dba West Coast Lockwasher Co Inc Div West Coast Lockwasher (USA) |
| BACW10BN42P | Moeller Manufacturing & Supply, Llc (USA) |
| BACW10BN42P | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| BACW10BN42P | 5/9 Secondary reference Mamco Mfg Co Inc |
| BACW10BN42P | 3/2 Design control — primary reference U.S. Government activity |
| BACW10BN42P | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-049-1280 is a Washer,flat, manufactured by Anillo Industries Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-049-1280 has 4 manufacturer part numbers on file: BACW10BN42P (Anillo Industries Llc), BACW10BN42P (West Coast Lockwasher Co., Inc. Dba West Coast Lockwasher Co Inc Div West Coast Lockwasher), BACW10BN42P (Moeller Manufacturing & Supply, Llc), BACW10BN42P (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for BACW10BN42P: Overall Diameter: 0.475 INCHES MINIMUM AND 0.495 INCHES MAXIMUM IN; Cross-Sectional Shape Style: RECTANGULAR; Specification/standard Data: 81205-BACW10BN MANUFACTURERS STANDARD; Peripheral Shape Style: ROUND. 8 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.