The Nut,self-Locking,spline, cataloged under National Stock Number 5310-00-596-6449, 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 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-596-6449 |
| Primary Part Number | 68NC1-62 |
| Item Name | Nut,self-Locking,spline |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | AMS 4118 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.138 INCHES IN |
| Pilot Diameter | 0.220 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN |
| Pilot Length | 0.057 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.245 INCHES MINIMUM AND 0.257 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE OVERALL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | ALUMINUM ALLOY 2017 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 |
|---|---|
| 68NC1-62 PRIMARY | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| 68NC1-62 | 5/9 Secondary reference Harvard Industries Inc |
| 333-0203-000 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-596-6449 is a Nut,self-Locking,spline, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-596-6449 has 1 manufacturer part number on file: 68NC1-62 (Esna, Llc).
Key specifications for 68NC1-62: Thread Series: UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: AMS 4118 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.138 INCHES IN. 12 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.