The Nut,plain,extended Washer,hexago, cataloged under National Stock Number 5310-01-662-3177, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Waterous Company. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-662-3177 |
| Primary Part Number | K 880 |
| Item Name | Nut,plain,extended Washer,hexago |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Waterous Company |
| Status | ACTIVE |
| Washer Outside Diameter | 1.700 INCHES NOMINAL IN |
| Width Across Flats | 1.290 INCHES NOMINAL IN |
| Thread Series | UNEF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.00 INCHES IN |
| Nut Style | HEXAGON |
| Thread Quantity Per Inch | 20 |
| 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 |
|---|---|
| K 880 PRIMARY | Waterous Company (USA) |
| Reference | Meaning |
|---|---|
| 1HB616 | 7/2 Vendor item drawing reference Oshkosh Defense Llc |
NSN 5310-01-662-3177 is a Nut,plain,extended Washer,hexago, manufactured by Waterous Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-662-3177 has 1 manufacturer part number on file: K 880 (Waterous Company).
Key specifications for K 880: Overall Height: 0.550 INCHES NOMINAL IN; Washer Outside Diameter: 1.700 INCHES NOMINAL IN; Width Across Flats: 1.290 INCHES NOMINAL IN; Thread Series: UNEF. 7 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.