The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-01-081-4690, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-081-4690 |
| Primary Part Number | 21FK-820 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — No Item Name Available |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Nut Height | 0.328 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 20 |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Bearing Surface Type | CHAMFERED |
| Nominal Thread Size | 0.500 INCHES IN |
| Material | STEEL OVERALL |
| Surface Treatment | CADMIUM OVERALL |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Thread Direction | RIGHT-HAND |
| Width Across Flats | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Nut Style | HEXAGON |
| Lubrication | SOLUBLE LUBRICANT |
| Thread Class | 3B |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 18GS88 | Oshkosh Defense Llc (USA) |
| 32394 | Garrison Manufacturing Inc (USA) |
| 21FK-820 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 21FK830 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 18GS88 | Oshkosh Corp (USA) |
| 424830-1 | Naval Air Warfare Center Aircraft Division Joint Base Jbmdl (USA) |
| 80131 | Federal Screw Products, Inc. (USA) |
NSN 5310-01-081-4690 is a Nut,self-Locking,hexagon, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310 (No Item Name Available). Status: active.
NSN 5310-01-081-4690 has 7 cross-referenced part numbers: 18GS88 (Oshkosh Defense Llc), 32394 (Garrison Manufacturing Inc), 21FK-820 (Sps Technologies, Llc Dba PB Fasteners), 21FK830 (Sps Technologies, Llc Dba PB Fasteners), 18GS88 (Oshkosh Corp) and 2 more.
There are 9 known substitutes for 5310-01-081-4690: 5935-00-283-2056, 5930-00-629-2439, 5310-00-763-8901 and 6 more. Verify interchangeability with system specifications before substitution.
Key specifications for 21FK-820: Nut Height: 0.328 INCHES MAXIMUM IN; Thread Quantity Per Inch: 20; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Bearing Surface Type: CHAMFERED. 13 total characteristics are documented in the Federal Logistics Information System.