The Washer,convex, cataloged under National Stock Number 5310-01-648-9576, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Forrest Machining Llc Dba Fmi Aerostructures. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Washer,convex |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Forrest Machining Llc Dba Fmi Aerostructures (CAGE 0FRC8); Sps Technologies, Llc Dba PB Fasteners (CAGE 56878); Monadnock Company, the Dba Lisi Aerospace (CAGE 60119) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-648-9576 |
| Primary Part Number | JSFW19P12A |
| Item Name | Washer,convex |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Forrest Machining Llc Dba Fmi Aerostructures |
| 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 |
|---|---|
| JSFW19P12A PRIMARY | Forrest Machining Llc Dba Fmi Aerostructures (USA) |
| JSFW19P12A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| JSFW19P12A PRIMARY | Monadnock Company, the Dba Lisi Aerospace (USA) |
| Reference | Meaning |
|---|---|
| JSFW19P12A | 1/2 Source control — Government-approved source U.S. Government activity |
| JSFW19 | D/9 Drawing number reference only U.S. Government activity |
NSN 5310-01-648-9576 is a Washer,convex, manufactured by Forrest Machining Llc Dba Fmi Aerostructures, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-648-9576 has 3 manufacturer part numbers on file: JSFW19P12A (Forrest Machining Llc Dba Fmi Aerostructures), JSFW19P12A (Sps Technologies, Llc Dba PB Fasteners), JSFW19P12A (Monadnock Company, the Dba Lisi Aerospace).
4 possible matches (shared part number, not a government interchangeability claim): 5310-01-648-9578, 5310-01-648-9581, 5310-01-648-9583. Verify interchangeability with system specifications before substitution.
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.