The Nut,plain,castellated,hexagon, cataloged under National Stock Number 5310-01-472-3474, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-472-3474 |
| Primary Part Number | 3M891-9 |
| Item Name | Nut,plain,castellated,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Width Across Flats | 0.863 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Thread Pitch Diameters | +0.5264 TO 0.5308 INCHES IN |
| Material Document and Classification | AMS5731 ASSN STD ALL MATERIAL RESPONSES OR AMS5732 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.562 INCHES IN |
| Nut Height | 0.385 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | CASTELLATED, HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 18 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Bearing Surface Type | CHAMFERED |
| 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 |
|---|---|
| 3M891-9 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 3M891-9 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 79537-918 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| AD3M891-9 | 5/9 Secondary reference U.S. Government activity |
| 3M891-9 | 3/2 Design control — primary reference U.S. Government activity |
| H52351-9 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| 3M891-9 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 3M891 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 5310-01-472-3474 is a Nut,plain,castellated,hexagon, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-472-3474 has 2 manufacturer part numbers on file: 3M891-9 (Howmet Global Fastening Systems Inc), 3M891-9 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 3M891-9: Width Across Flats: 0.863 INCHES MINIMUM AND 0.877 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC ALL TREATMENT RESPONSES OVERALL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Thread Pitch Diameters: +0.5264 TO 0.5308 INCHES IN. 14 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.