The Nut,self-Locking,spline, cataloged under National Stock Number 5310-01-206-5183, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Esna, Llc. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-206-5183 |
| Primary Part Number | 12NC4248-1-40 |
| Item Name | Nut,self-Locking,spline |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Width Across Flats | 0.300 INCHES NOMINAL IN |
| Nut Length | 0.446 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Nut Counterbore Depth | 0.062 INCHES NOMINAL FIRST END IN |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.112 INCHES IN |
| Counterbore Diameter | 0.175 INCHES MINIMUM AND 0.185 INCHES MAXIMUM FIRST END IN |
| Pilot Diameter | 0.222 INCHES MINIMUM AND 0.227 INCHES MAXIMUM IN |
| Pilot Length | 0.037 INCHES MINIMUM AND 0.043 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.175 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL EXCEPT INSERT |
| Nut Style | SPLINE (FLOATING) |
| Thread Class | 3B |
| Thread Quantity Per Inch | 40 |
| Material | STEEL OVERALL EXCEPT INSERT |
| Material | PLASTIC POLYAMIDE NYLON LOCKING INSERT |
| 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 |
|---|---|
| 12NC4248-1-40 | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| 12NC4248-1-40 | 3/9 Design control — primary reference Harvard Industries Inc |
| 588616-3 | 7/2 Vendor item drawing reference Hamilton Sundstrand Corporation Dba Collins Aerospace |
NSN 5310-01-206-5183 is a Nut,self-Locking,spline, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-206-5183 has 1 manufacturer part number on file: 12NC4248-1-40 (Esna, Llc).
Key specifications for 12NC4248-1-40: Width Across Flats: 0.300 INCHES NOMINAL IN; Nut Length: 0.446 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL COARSE (UNC); Nut Counterbore Depth: 0.062 INCHES NOMINAL FIRST END IN. 18 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.