The Nut,self-Locking,round, cataloged under National Stock Number 5310-01-054-2556, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Aimtron Systems, Llc. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-054-2556 |
| Primary Part Number | 505020-1 |
| Item Name | Nut,self-Locking,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Aimtron Systems, Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625 TYPE 2 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | QQ-A-225/6 T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Drive Point Width | 0.060 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.138 INCHES IN |
| Nut Diameter | 0.315 INCHES NOMINAL IN |
| Drive Point Depth | 0.060 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE WITH METALLIC INSERT |
| Nut Thickness | 0.300 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Drive Point Quantity | 2 |
| Nut Style | ROUND |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Material | ALUMINUM ALLOY 2024 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 |
|---|---|
| 505020-1 PRIMARY | Aimtron Systems, Llc (USA) |
| Reference | Meaning |
|---|---|
| 505020-1 | 5/9 Secondary reference Cardion Inc |
| 505020 | C/1 Advisory reference — outside the item-of-supply concept Aimtron Systems, Llc |
NSN 5310-01-054-2556 is a Nut,self-Locking,round, manufactured by Aimtron Systems, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-054-2556 has 1 manufacturer part number on file: 505020-1 (Aimtron Systems, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5995-01-688-5167. Verify interchangeability with system specifications before substitution.
Key specifications for 505020-1: Surface Treatment Document and Classification: MIL-A-8625 TYPE 2 CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: QQ-A-225/6 T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Drive Point Width: 0.060 INCHES NOMINAL IN. 16 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.