The Washer,flat, cataloged under National Stock Number 5310-01-047-8877, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rotair Aerospace Corp. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-047-8877 |
| Primary Part Number | 209-040-108-1 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rotair Aerospace Corp |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES ALL SURFACES |
| Overall Diameter | 1.250 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-18729,COND N MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5626,COND D1 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 4130 OR STEEL COMP 4140 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.890 INCHES NOMINAL IN |
| Thickness | 0.0905 INCHES MINIMUM AND 0.0915 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 |
|---|---|
| 209-040-108-1 PRIMARY | Rotair Aerospace Corp (USA) |
| Reference | Meaning |
|---|---|
| 209-040-108-1 | 5/9 Secondary reference Valcore Manufacturing Llc |
| 209-040-108-1 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5310-01-047-8877 is a Washer,flat, manufactured by Rotair Aerospace Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-047-8877 has 1 manufacturer part number on file: 209-040-108-1 (Rotair Aerospace Corp).
Key specifications for 209-040-108-1: Surface Finish: 63.0 MICROINCHES ALL SURFACES; Overall Diameter: 1.250 INCHES NOMINAL IN; Material Document and Classification: MIL-S-18729,COND N MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5626,COND D1 MIL SPEC 2ND MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR. 9 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.