The Nut,plain,round, cataloged under National Stock Number 5310-01-185-8681, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is C N C Techniques Corporation. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-185-8681 |
| Primary Part Number | K671857-11 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | C N C Techniques Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT THREADS |
| Thread Series | UN |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | LEFT-HAND |
| Nominal Thread Size | 5.250 INCHES IN |
| Nut Diameter | 5.875 INCHES MINIMUM AND 5.879 INCHES MAXIMUM IN |
| Drive Point Depth | 0.750 INCHES NOMINAL IN |
| Nut Thickness | 0.750 INCHES NOMINAL IN |
| Drive Point Diameter | 0.154 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL EXCEPT THREADS |
| Drive Point Quantity | 18 |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 4130 OVERALL |
| 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 |
|---|---|
| K671857-11 | C N C Techniques Corporation (USA) |
| Reference | Meaning |
|---|---|
| K671857-11 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-185-8681 is a Nut,plain,round, manufactured by C N C Techniques Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-185-8681 has 1 manufacturer part number on file: K671857-11 (C N C Techniques Corporation).
Key specifications for K671857-11: Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL EXCEPT THREADS; Thread Series: UN; Hardness Rating: 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM; Material Document and Classification: MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 16 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.