The Nut,self-Locking,clinch, cataloged under National Stock Number 5310-00-984-6913, 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 19 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-984-6913 |
| Primary Part Number | 79NKCFM2-40 |
| Item Name | Nut,self-Locking,clinch |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Temp Rating | 350.0 FAHRENHEIT NOMINAL DEGF |
| Material Document and Classification | MIL-M-20693 MIL SPEC 2ND MATERIAL RESPONSE LOCKING INSERT |
| Material Document and Classification | AISI 303 ASSN STD 1ST MATERIAL RESPONSE NUT |
| Material Document and Classification | MIL-M-20693 MIL SPEC 3RD MATERIAL RESPONSE CAP |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.112 INCHES IN |
| Nut Diameter | 0.198 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN |
| Pilot Diameter | 0.158 INCHES MINIMUM AND 0.162 INCHES MAXIMUM IN |
| Pilot Length | 0.057 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.233 INCHES MINIMUM AND 0.239 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE NUT |
| Nut Style | CLINCH |
| Thread Class | 3B |
| Thread Quantity Per Inch | 40 |
| Material | PLASTIC POLYHEXAMETHYLENE AMIDE OR PLASTIC POLYCAPROLACTAM LOCKING INSERT |
| Material | STEEL COMP 303 NUT |
| Material | PLASTIC POLYHEXAMETHYLENE AMIDE OR PLASTIC POLYCAPROLACTAM CAP |
| 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 |
|---|---|
| 79NKCFM2-40 PRIMARY | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| 10121917 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 610076P4 | 5/2 Secondary reference U.S. Government activity |
| 002-003716-014 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple |
| 79NKCFM2-40 | 5/9 Secondary reference Harvard Industries Inc |
| 79NKCM2-40 | C/1 Advisory reference — outside the item-of-supply concept Harvard Industries Inc |
NSN 5310-00-984-6913 is a Nut,self-Locking,clinch, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-984-6913 has 1 manufacturer part number on file: 79NKCFM2-40 (Esna, Llc).
Key specifications for 79NKCFM2-40: Thread Series: UNIFIED NATIONAL COARSE (UNC); Temp Rating: 350.0 FAHRENHEIT NOMINAL DEGF; Material Document and Classification: MIL-M-20693 MIL SPEC 2ND MATERIAL RESPONSE LOCKING INSERT; Material Document and Classification: AISI 303 ASSN STD 1ST MATERIAL RESPONSE NUT. 19 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.