The Nut,self-Locking,barrel, cataloged under National Stock Number 5310-01-675-0553, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ancra International Llc Div Ancra Cargo. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-675-0553 |
| Primary Part Number | 45240-31 |
| Item Name | Nut,self-Locking,barrel |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ancra International Llc Div Ancra Cargo |
| Status | ACTIVE |
| Nut Length | 1.00 INCHES NOMINAL IN |
| Thread Series | UNF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.3125 INCHES IN |
| Nut Diameter | 0.56 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.85 INCHES NOMINAL IN |
| Nut Style | FLOATING SELF-LOCKING BARREL |
| Thread Class | 2B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
|---|---|
| 45240-31 PRIMARY | Ancra International Llc Div Ancra Cargo (USA) |
| Reference | Meaning |
|---|---|
| 6214276 | 7/2 Vendor item drawing reference Naval Sea Systems Command |
NSN 5310-01-675-0553 is a Nut,self-Locking,barrel, manufactured by Ancra International Llc Div Ancra Cargo, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-675-0553 has 1 manufacturer part number on file: 45240-31 (Ancra International Llc Div Ancra Cargo).
Key specifications for 45240-31: Nut Length: 1.00 INCHES NOMINAL IN; Thread Series: UNF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.3125 INCHES IN. 11 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.