The Nut,plain,spline, cataloged under National Stock Number 5310-01-287-6290, 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 26 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-287-6290 |
| Primary Part Number | GFP601NL12B |
| Item Name | Nut,plain,spline |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Width Across Flats | 0.450 INCHES NOMINAL IN |
| Nut Length | 0.650 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BASE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BRACKET |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 800.0 FAHRENHEIT MAXIMUM DEGF |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | AMS 5528 ASSN STD SINGLE MATERIAL RESPONSE BRACKET |
| Material Document and Classification | AMS 5639 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5514 ASSN STD 2ND MATERIAL RESPONSE BASE |
| Nut Counterbore Depth | 0.219 INCHES NOMINAL NUT IN |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Counterbore Diameter | 0.310 INCHES NOMINAL NUT IN |
| Pilot Diameter | 0.335 INCHES MAXIMUM IN |
| Pilot Length | 0.130 INCHES NOMINAL IN |
| Nut Height | 0.430 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE BASE |
| Surface Treatment | PASSIVATE BRACKET |
| Nut Style | SPLINE (FLOATING) |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 NUT |
| Material | STEEL COMP 304 OR STEEL COMP 305 BASE |
| Material | STEEL COMP 631 BRACKET |
| 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 |
|---|---|
| GFP601NL12B PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| GFP6010NL12B PRIMARY | Huck International, Inc. Div Huck Products Division (USA) |
| Reference | Meaning |
|---|---|
| FFC6010NL-12-B | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| GFP6010NL12B | 5/9 Secondary reference U.S. Government activity |
| 841617-33 | C/1 Advisory reference — outside the item-of-supply concept Litton Systems Inc. Div Navigation Systems Division |
NSN 5310-01-287-6290 is a Nut,plain,spline, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-287-6290 has 2 manufacturer part numbers on file: GFP601NL12B (Howmet Global Fastening Systems Inc), GFP6010NL12B (Huck International, Inc. Div Huck Products Division).
Key specifications for GFP601NL12B: Lubrication: DRY FILM LUBRICANT; Width Across Flats: 0.450 INCHES NOMINAL IN; Nut Length: 0.650 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BASE. 26 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.