The Washer,flat, cataloged under National Stock Number 5310-01-305-8580, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Honeywell International Inc. Div Aerospace - Torrance. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5310-01-305-8580 |
| Primary Part Number | 2040892-27 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35,TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Overall Diameter | 0.625 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-766,1/4 HARD,1/2 HARD OR FULL HARD FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-766,1/4 HARD OR 1/2 HARD FED SPEC 2ND MATERIAL RESPONSE OR MIL-S-5059,1/4 HARD,1/2 HARD OR FULL HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 301 OR STEEL COMP 302 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.391 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN |
| Thickness | 0.020 INCHES NOMINAL 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 |
|---|---|
| 2040892-27 PRIMARY | Honeywell International Inc. Div Aerospace - Torrance (USA) |
| Reference | Meaning |
|---|---|
| 10122188 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 2040892-27 | 5/9 Secondary reference Moog Military Aircraft Llc |
NSN 5310-01-305-8580 is a Washer,flat, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-305-8580 has 1 manufacturer part number on file: 2040892-27 (Honeywell International Inc. Div Aerospace - Torrance).
Key specifications for 2040892-27: Surface Treatment Document and Classification: QQ-P-35,TY 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Overall Diameter: 0.625 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN; Material Document and Classification: QQ-S-766,1/4 HARD,1/2 HARD OR FULL HARD FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-766,1/4 HARD OR 1/2 HARD FED SPEC 2ND MATERIAL RESPONSE OR MIL-S-5059,1/4 HARD,1/2 HARD OR FULL HARD MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 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.