The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-072-8255, 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 22 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-072-8255 |
| Primary Part Number | 52LHTA57M-82 |
| 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 | 0.716 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Plate Width | 0.260 INCHES MAXIMUM IN |
| Temp Rating | 450.0 FAHRENHEIT MINIMUM AND 900.0 FAHRENHEIT MAXIMUM DEGF |
| Mounting Hole Arrangement Style | 2 HOLES |
| Mounting Hole Diameter | 0.093 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| Nut Counterbore Depth | 0.062 INCHES NOMINAL NUT IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.164 INCHES IN |
| Counterbore Diameter | 0.168 INCHES NOMINAL NUT IN |
| Distance From Aperture Center to Mounting Hole Center | 0.212 INCHES MINIMUM AND 0.217 INCHES MAXIMUM IN |
| Locking Feature | FREE-RUNNING ALL METAL DESIGN |
| Center to Center Distance Between Mounting Holes Along Length | 0.229 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN |
| Nut Height | 0.215 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 52LHTA57M-82 PRIMARY | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| 52LHTA57M-82 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-072-8255 is a Nut,self-Locking,plate, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-072-8255 has 1 manufacturer part number on file: 52LHTA57M-82 (Esna, Llc).
Key specifications for 52LHTA57M-82: Plate Thickness: 0.037 INCHES NOMINAL IN; Nut Length: 0.716 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL COARSE (UNC). 22 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.