The Washer,flat, cataloged under National Stock Number 5310-00-902-4098, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ozark Aeroworks Llc. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-902-4098 |
| Primary Part Number | 1-130-218-01 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ozark Aeroworks Llc |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES BOTTOM |
| Surface Finish | 63.0 MICROINCHES TOP |
| Overall Diameter | 0.440 INCHES NOMINAL IN |
| Hardness Rating | 63.5 ROCKWELL A MINIMUM AND 68.0 ROCKWELL A MAXIMUM |
| Material Document and Classification | AMS 5637 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Surface Treatment | PASSIVATE OVERALL |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 302 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.252 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN |
| Thickness | 0.050 INCHES MINIMUM AND 0.060 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 |
|---|---|
| 1-130-218-01 PRIMARY | Ozark Aeroworks Llc (USA) |
| Reference | Meaning |
|---|---|
| 1-130-218-01 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5310-00-902-4098 is a Washer,flat, manufactured by Ozark Aeroworks Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-902-4098 has 1 manufacturer part number on file: 1-130-218-01 (Ozark Aeroworks Llc).
Key specifications for 1-130-218-01: Surface Finish: 63.0 MICROINCHES BOTTOM; Surface Finish: 63.0 MICROINCHES TOP; Overall Diameter: 0.440 INCHES NOMINAL IN; Hardness Rating: 63.5 ROCKWELL A MINIMUM AND 68.0 ROCKWELL A MAXIMUM. 12 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.