The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-501-0237, 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 29 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-501-0237 |
| Primary Part Number | FNA401-62 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Plate Thickness | 0.037 INCHES NOMINAL IN |
| Nut Length | 0.953 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE SHELL |
| Surface Treatment Document and Classification | QQ-P-416, TYPE II, CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE BASE |
| Surface Treatment Document and Classification | QQ-P-416, TYPE II, CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE NUT |
| Thread Series | UNF |
| Plate Width | 0.406 INCHES MAXIMUM IN |
| Temp Rating | 250.0 FAHRENHEIT NOMINAL DEGF |
| Mounting Hole Arrangement Style | 2 HOLES |
| Material Document and Classification | AISI-1137 ASSN STD 1ST MATERIAL RESPONSE AND AMS5024 ASSN STD 2ND MATERIAL RESPONSE NUT |
| Material Document and Classification | MIL-M-20693, TYPE II, CLASS 3 MIL SPEC SINGLE MATERIAL RESPONSE LOCKING INSERT |
| Mounting Hole Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.138 INCHES IN |
| Distance From Aperture Center to Mounting Hole Center | 0.344 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Center to Center Distance Between Mounting Holes Along Length | 0.688 INCHES NOMINAL IN |
| Nut Height | 0.214 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM NUT |
| Surface Treatment | CHROMATE SHELL |
| Surface Treatment | CADMIUM AND CHROMATE BASE |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 1137 NUT |
| Material | PLASTIC POLYHEXAMETHYLENE ADIPAMIDE LOCKING INSERT |
| Material | ALUMINUM ALLOY 7075 SHELL |
| Nut Mounting Provision | STRAIGHT HOLES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-01-501-0237 is a Nut,self-Locking,plate, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-501-0237 has 2 manufacturer part numbers on file: 108769-8 (Raytheon Company), FNA401-62 (Esna, Llc).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-512-1568. Verify interchangeability with system specifications before substitution.
Key specifications for FNA401-62: Plate Thickness: 0.037 INCHES NOMINAL IN; Nut Length: 0.953 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE SHELL; Surface Treatment Document and Classification: QQ-P-416, TYPE II, CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE BASE. 29 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.