The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-388-7011, 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 23 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-388-7011 |
| Primary Part Number | ST1571-05 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Plate Thickness | 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN |
| Nut Length | 1.306 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SHELL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Plate Width | 0.531 INCHES MAXIMUM IN |
| Temp Rating | 785.0 FAHRENHEIT MINIMUM AND 815.0 FAHRENHEIT MAXIMUM DEGF |
| Mounting Hole Arrangement Style | 2 HOLES |
| Material Document and Classification | AMS5525 ASSN STD SINGLE MATERIAL RESPONSE SHELL |
| Material Document and Classification | AMS5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5735 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Mounting Hole Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Counterbore Diameter | 0.312 INCHES MINIMUM FIRST END IN |
| Distance From Aperture Center to Mounting Hole Center | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Center to Center Distance Between Mounting Holes Along Length | 0.310 INCHES MINIMUM AND 0.314 INCHES MAXIMUM IN |
| Nut Height | 0.281 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE SHELL |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 SHELL |
| Material | IRON ALLOY 660 NUT |
| 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 |
|---|---|
| ST1571-05 PRIMARY | Esna, Llc (USA) |
| ST1571-05 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| F-536-574 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| ST1571-05 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-388-7011 is a Nut,self-Locking,plate, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-388-7011 has 2 manufacturer part numbers on file: ST1571-05 (Esna, Llc), ST1571-05 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for ST1571-05: Plate Thickness: 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN; Nut Length: 1.306 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE SHELL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 23 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.