The Washer,flat, cataloged under National Stock Number 5310-00-931-4785, 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 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-931-4785 |
| Primary Part Number | 1-130-259-02 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ozark Aeroworks Llc |
| Status | ACTIVE |
| Overall Diameter | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Hardness Rating | 76.0 ROCKWELL SUPERFICIAL 30-T MAXIMUM |
| Material Document and Classification | AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL COMP 321 OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.468 INCHES MINIMUM AND 0.472 INCHES MAXIMUM IN |
| Thickness | 0.031 INCHES MINIMUM AND 0.039 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 |
|---|---|
| 1-130-259-02 PRIMARY | Ozark Aeroworks Llc (USA) |
| Reference | Meaning |
|---|---|
| 1-130-259-02 | 3/9 Design control — primary reference U.S. Government activity |
| 1-130-259-01 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5310-00-931-4785 is a Washer,flat, manufactured by Ozark Aeroworks Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-931-4785 has 1 manufacturer part number on file: 1-130-259-02 (Ozark Aeroworks Llc).
Key specifications for 1-130-259-02: Overall Diameter: 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN; Hardness Rating: 76.0 ROCKWELL SUPERFICIAL 30-T MAXIMUM; Material Document and Classification: AMS 5510 ASSN STD SINGLE 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.