The Washer,concave, cataloged under National Stock Number 5310-01-340-9084, 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. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-340-9084 |
| Primary Part Number | 942008-8 |
| Item Name | Washer,concave |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Monadnock Company, the Dba Lisi Aerospace |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AMS 2416 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Radius | 0.195 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| Style Designator | CONCAVE |
| Material Document and Classification | AMS 5643 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5528 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Outside Diameter | 0.870 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN |
| Material Thickness | 0.235 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Surface Treatment | NICKEL AND CADMIUM OVERALL |
| Material | STEEL COMP 630 OR STEEL COMP 631 OVERALL |
| Hole Diameter | 0.448 INCHES MINIMUM AND 0.458 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 |
|---|---|
| 942008-8 | Monadnock Company, the Dba Lisi Aerospace (USA) |
| 70191-8 | Alta Products Co Inc (USA) |
| K29913-8 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| BACW10CA8CC | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-340-9084 is a Washer,concave, manufactured by Monadnock Company, the Dba Lisi Aerospace, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-340-9084 has 3 manufacturer part numbers on file: 942008-8 (Monadnock Company, the Dba Lisi Aerospace), 70191-8 (Alta Products Co Inc), K29913-8 (Howmet Global Fastening Systems Inc).
3 possible matches (shared part number, not a government interchangeability claim): 5331-01-485-8180, 5310-01-687-8879, 5310-01-692-9809. Verify interchangeability with system specifications before substitution.
Key specifications for 942008-8: Surface Treatment Document and Classification: AMS 2416 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Radius: 0.195 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM; Style Designator: CONCAVE. 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.