The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-116-6639, 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 24 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5310-01-116-6639 |
| Primary Part Number | 79 A 27M-79-40 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Plate Thickness | 0.025 INCHES NOMINAL IN |
| Nut Length | 0.455 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| Distance From Mounting Hole Center to Base | 0.230 INCHES NOMINAL IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Plate Width | 0.266 INCHES NOMINAL IN |
| Temp Rating | 250.0 FAHRENHEIT MAXIMUM DEGF |
| Mounting Hole Arrangement Style | 2 HOLES |
| Distance From Base to Center of Aperture | 0.156 INCHES NOMINAL IN |
| Material Document and Classification | AISI ASSN STD 1ST MATERIAL RESPONSE OR AMS 5525 ASSN STD 2ND MATERIAL RESPONSE SHELL |
| Material Document and Classification | MIL-M-20693,TY 1 MIL SPEC SINGLE MATERIAL RESPONSE LOCKING INSERT |
| Material Document and Classification | QQ-S-763,COND A FED SPEC 1ST MATERIAL RESPONSE OR ASTM A582,COND A ASSN STD 2ND MATERIAL RESPONSE NUT |
| Mounting Hole Diameter | 0.066 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.112 INCHES IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Center to Center Distance Between Mounting Holes Along Length | 0.138 INCHES MINIMUM AND 0.142 INCHES MAXIMUM IN |
| Nut Height | 0.151 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL EXCEPT INSERT |
| Thread Class | 3B |
| Thread Quantity Per Inch | 40 |
| Material | STEEL COMP 321 OR IRON ALLOY 660 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 |
| Part Number | Manufacturer |
|---|---|
| 79 A 27M-79-40 PRIMARY | Esna, Llc (USA) |
| 10111756 PRIMARY | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| 124779-05 | 7/2 Vendor item drawing reference Ge Aviation Systems Llc |
| 79 A 27M-79-40 | 5/9 Secondary reference Harvard Industries Inc |
| 79A27M-79-40A | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-116-6639 is a Nut,self-Locking,plate, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-116-6639 has 2 manufacturer part numbers on file: 79 A 27M-79-40 (Esna, Llc), 10111756 (Us Army Aviation and Missile Command).
1 possible match (shared part number, not a government interchangeability claim): 5320-01-144-3186. Verify interchangeability with system specifications before substitution.
Key specifications for 79 A 27M-79-40: Plate Thickness: 0.025 INCHES NOMINAL IN; Nut Length: 0.455 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT; Distance From Mounting Hole Center to Base: 0.230 INCHES NOMINAL IN. 24 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.