The Nut,self-Locking,single Ball Sea, cataloged under National Stock Number 5310-01-491-3438, 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 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-491-3438 |
| Primary Part Number | H55263-3 |
| Item Name | Nut,self-Locking,single Ball Sea |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Lubrication | WAX |
| Width Across Flats | 0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2411 ASSN STD SINGLE TREATMENT RESPONSE THREADS |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Precious Material | SILVER |
| Temp Rating | 1400.0 FAHRENHEIT NOMINAL DEGF |
| Material Document and Classification | AMS 5544 ASSN STD 1ST MATERIAL RESPONSE AND AMS 5709 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Specification/standard Data | 07482--50TF7 MANUFACTURERS SPECIFICATION |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.185 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Surface Treatment | SILVER THREADS |
| Nut Style | SINGLE BALL SEAT, DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | NICKEL ALLOY UNS N07001 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 |
|---|---|
| H55263-3 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 3022T66P07 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 3022T66P16 | 1/2 Source control — Government-approved source U.S. Government activity |
| VN1441W02-4 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5310-01-491-3438 is a Nut,self-Locking,single Ball Sea, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-491-3438 has 1 manufacturer part number on file: H55263-3 (Howmet Global Fastening Systems Inc).
Key specifications for H55263-3: Lubrication: WAX; Width Across Flats: 0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2411 ASSN STD SINGLE TREATMENT RESPONSE THREADS; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 17 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.