The Nut,self-Locking,knurled, cataloged under National Stock Number 5310-01-166-6904, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-166-6904 |
| Primary Part Number | ST3M646-1032 |
| Item Name | Nut,self-Locking,knurled |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Nut Diameter | 0.309 INCHES NOMINAL IN |
| Nut Thickness | 0.307 INCHES NOMINAL IN |
| Nut Style | KNURLED |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP XM-13 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 |
|---|---|
| ST3M646-1032 PRIMARY | The Boeing Company Div Defense (USA) |
| BB567-1032 | Hi-Shear Corporation (USA) |
| 1534AS375-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| BB567-1032 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BB567-1032 | West Coast Aerospace, Inc. (USA) |
NSN 5310-01-166-6904 is a Nut,self-Locking,knurled, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-166-6904 has 5 manufacturer part numbers on file: ST3M646-1032 (The Boeing Company Div Defense), BB567-1032 (Hi-Shear Corporation), 1534AS375-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), BB567-1032 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BB567-1032 (West Coast Aerospace, Inc.).
Key specifications for ST3M646-1032: Lubrication: DRY FILM LUBRICANT; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Material Document and Classification: AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND. 11 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.