The Nut,plain,round, cataloged under National Stock Number 5310-00-221-3871, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 15 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-221-3871 |
| Primary Part Number | 166276PC6 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Thread Series | UNF |
| Material Document and Classification | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.180 INCHES NOMINAL NUT IN |
| Drive Point Width | 0.187 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.125 INCHES IN |
| Nut Diameter | 1.750 INCHES NOMINAL IN |
| Counterbore Diameter | 1.220 INCHES NOMINAL NUT IN |
| Drive Point Depth | 0.080 INCHES NOMINAL IN |
| Nut Thickness | 0.620 INCHES NOMINAL IN |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 1117 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 |
|---|---|
| 166276PC6 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 5310-00-221-3871 is a Nut,plain,round, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-221-3871 has 1 manufacturer part number on file: 166276PC6 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 166276PC6: Thread Series: UNF; Material Document and Classification: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Nut Counterbore Depth: 0.180 INCHES NOMINAL NUT IN; Drive Point Width: 0.187 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN. 15 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.