The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-655-6687, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company (CAGE 77294) |
| Parameter | Value |
|---|---|
| NSN | 5310-00-655-6687 |
| Primary Part Number | 400 889 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 400 889 | Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company (USA) |
| Reference | Meaning |
|---|---|
| MS20365-524C | 2/2 Government specification standardization U.S. Government activity |
| 10335800 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5310-00-655-6687 is a Nut,self-Locking,hexagon, manufactured by Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-655-6687 has 1 manufacturer part number on file: 400 889 (Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company).
2 possible matches (shared part number, not a government interchangeability claim): 5310-00-982-4912, 5360-01-078-4976. Verify interchangeability with system specifications before substitution.
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.