The Washer,convex, cataloged under National Stock Number 5310-01-660-1643, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Monadnock Company, the Dba Lisi Aerospace. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Washer,convex |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Monadnock Company, the Dba Lisi Aerospace (CAGE 60119); Sps Technologies, Llc Dba PB Fasteners (CAGE 56878); Howmet Global Fastening Systems Inc (CAGE 15653) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-660-1643 |
| Primary Part Number | BACW10CA31CVS |
| Item Name | Washer,convex |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Monadnock Company, the Dba Lisi Aerospace |
| Status | ACTIVE |
| 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 |
|---|---|
| BACW10CA31CVS | Monadnock Company, the Dba Lisi Aerospace (USA) |
| BACW10CA31CVS | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACW10CA31CVS | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| BACW10CA31CV | 3/2 Design control — primary reference U.S. Government activity |
| BACW10CA31CVS | 3/9 Design control — primary reference U.S. Government activity |
NSN 5310-01-660-1643 is a Washer,convex, manufactured by Monadnock Company, the Dba Lisi Aerospace, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-660-1643 has 3 manufacturer part numbers on file: BACW10CA31CVS (Monadnock Company, the Dba Lisi Aerospace), BACW10CA31CVS (Sps Technologies, Llc Dba PB Fasteners), BACW10CA31CVS (Howmet Global Fastening Systems Inc).
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.