The Nut,plain,castellated,hexagon, cataloged under National Stock Number 5310-01-665-6344, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-665-6344 |
| Primary Part Number | ASME B18.2.2-9/16"UNFSSBLACK |
| Item Name | Nut,plain,castellated,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Nut Length | 101.00 MILLIMETERS NOMINAL MM |
| Thread Series | UNF |
| Nominal Thread Size | 0.56 INCHES IN |
| Nut Style | CASTELLATED, HEXAGON |
| 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 |
|---|---|
| S1605-9/16UNF-SS-CB | Istec Services Limited (GBR) |
| ASME B18.2.2-9/16"UNFSSBLACK PRIMARY | The American Society of Mechanical Engineers (USA) |
NSN 5310-01-665-6344 is a Nut,plain,castellated,hexagon, manufactured by The American Society of Mechanical Engineers, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-665-6344 has 2 manufacturer part numbers on file: S1605-9/16UNF-SS-CB (Istec Services Limited), ASME B18.2.2-9/16"UNFSSBLACK (The American Society of Mechanical Engineers).
Key specifications for ASME B18.2.2-9/16"UNFSSBLACK: Nut Length: 101.00 MILLIMETERS NOMINAL MM; Thread Series: UNF; Nominal Thread Size: 0.56 INCHES IN; Part Name Assigned by Controlling Agency: BOLT HEX HEAD,IMPERIAL. 4 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.