The Washer,flat, cataloged under National Stock Number 5310-01-043-4329, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-043-4329 |
| Primary Part Number | 718661-4 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| Overall Diameter | 0.815 INCHES MINIMUM AND 0.825 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5062 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5122 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5045 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Cross-Sectional Shape Style | RECTANGULAR |
| Peripheral Shape Style | ROUND |
| Material | STEEL OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.505 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN |
| Thickness | 0.019 INCHES MINIMUM AND 0.021 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 |
|---|---|
| 718661-4 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 718661-4 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-043-4329 is a Washer,flat, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-043-4329 has 1 manufacturer part number on file: 718661-4 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 718661-4: Overall Diameter: 0.815 INCHES MINIMUM AND 0.825 INCHES MAXIMUM IN; Material Document and Classification: AMS 5062 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5122 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5045 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Cross-Sectional Shape Style: RECTANGULAR; Peripheral Shape Style: ROUND. 8 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.