The Nut,self-Locking,round, cataloged under National Stock Number 5310-00-856-0591, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-856-0591 |
| Primary Part Number | BR7414-4712 |
| Item Name | Nut,self-Locking,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-P-16232,TY Z,CL 4A MIL SPEC SINGLE TREATMENT RESPONSE NUT A |
| Thread Series | UNS |
| Temp Rating | -75.0 FAHRENHEIT MINIMUM AND 250.0 FAHRENHEIT MAXIMUM DEGF |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Thread Pitch Diameters | +2.8789 TO 2.8851 INCHES IN |
| Material Document and Classification | AMS 6370 ASSN STD 1ST MATERIAL RESPONSE OR SAE ASSN STD 1ST MATERIAL RESPONSE NUT |
| Material Document and Classification | NYLON ZYREL-103FSCM 81205 MFR REF 2ND MATERIAL RESPONSE LOCKING INSERT |
| Drive Point Width | 0.359 INCHES MINIMUM AND 0.391 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.933 INCHES IN |
| Nut Diameter | 3.673 INCHES MINIMUM AND 3.693 INCHES MAXIMUM IN |
| Specification/standard Data | 81205-BACN10GR MANUFACTURERS STANDARD |
| Drive Point Depth | 0.110 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Undercut Thickness | 0.044 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Thickness | 0.460 INCHES MINIMUM AND 0.490 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE ZINC NUT |
| Countersink Angle | 90.0 DEGREES MINIMUM AND 110.0 DEGREES MAXIMUM NUT |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 4130 NUT |
| 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 |
|---|---|
| BR7414-4712 PRIMARY | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| VS10304 | 5/9 Secondary reference The Boeing Company |
| BR7414-4712 | 5/9 Secondary reference Harvard Industries Inc |
| VS10304 | 5/9 Secondary reference U.S. Government activity |
| BACN10GR7 | 1/2 Source control — Government-approved source U.S. Government activity |
NSN 5310-00-856-0591 is a Nut,self-Locking,round, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-856-0591 has 1 manufacturer part number on file: BR7414-4712 (Esna, Llc).
Key specifications for BR7414-4712: Surface Treatment Document and Classification: MIL-P-16232,TY Z,CL 4A MIL SPEC SINGLE TREATMENT RESPONSE NUT A; Thread Series: UNS; Temp Rating: -75.0 FAHRENHEIT MINIMUM AND 250.0 FAHRENHEIT MAXIMUM DEGF; Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM. 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.