The Nut,plain,spline, cataloged under National Stock Number 5310-01-337-0981, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Div Huck Products Division. Government technical data includes 20 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-337-0981 |
| Primary Part Number | FFC601NL-6-B |
| Item Name | Nut,plain,spline |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Huck International, Inc. Div Huck Products Division |
| Status | ACTIVE |
| Width Across Flats | 0.295 INCHES NOMINAL IN |
| Nut Length | 0.405 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNJC |
| Material Document and Classification | AMS 5085 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | AMS 5085 ASSN STD SINGLE MATERIAL RESPONSE BRACKET |
| Material Document and Classification | AMS 5639 ASSN STD SINGLE MATERIAL RESPONSE BOSS |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.138 INCHES IN |
| Pilot Diameter | 0.217 INCHES MAXIMUM IN |
| Pilot Length | 0.115 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| Nut Height | 0.319 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Nut Style | SPLINE (FLOATING) |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 1050 BRACKET |
| Material | STEEL COMP 1050 NUT |
| Material | STEEL COMP 304 BOSS |
| 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 |
|---|---|
| FFC601NL-6-B PRIMARY | Huck International, Inc. Div Huck Products Division (USA) |
| Reference | Meaning |
|---|---|
| 841617-10 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp |
| FFC601NL-6-B | 3/9 Design control — primary reference U.S. Government activity |
| 841617-10 | 5/9 Secondary reference Litton Systems Inc. Div Navigation Systems Division |
NSN 5310-01-337-0981 is a Nut,plain,spline, manufactured by Huck International, Inc. Div Huck Products Division, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-337-0981 has 1 manufacturer part number on file: FFC601NL-6-B (Huck International, Inc. Div Huck Products Division).
Key specifications for FFC601NL-6-B: Width Across Flats: 0.295 INCHES NOMINAL IN; Nut Length: 0.405 INCHES MINIMUM AND 0.435 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNJC. 20 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.