The Nut,self-Locking,cap, cataloged under National Stock Number 5310-01-490-3364, 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 12 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-490-3364 |
| Primary Part Number | F39326-4 |
| Item Name | Nut,self-Locking,cap |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | AMS5688 ASSN STD SINGLE MATERIAL RESPONSE CLIP |
| Material Document and Classification | MIL-R-6855, CLASS 1, GRADE 60, BLACK MIL SPEC SINGLE MATERIAL RESPONSE SEAL |
| Material Document and Classification | MS5085 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEAL |
| Material | STEEL COMP 1050 NUT |
| Material | STEEL COMP 302 CLIP |
| Bearing Surface Type | FLAT |
| 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 |
|---|---|
| F39326-4 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
NSN 5310-01-490-3364 is a Nut,self-Locking,cap, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-490-3364 has 1 manufacturer part number on file: F39326-4 (Howmet Global Fastening Systems Inc).
Key specifications for F39326-4: Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Material Document and Classification: AMS5688 ASSN STD SINGLE MATERIAL RESPONSE CLIP; Material Document and Classification: MIL-R-6855, CLASS 1, GRADE 60, BLACK MIL SPEC SINGLE MATERIAL RESPONSE SEAL; Material Document and Classification: MS5085 ASSN STD SINGLE MATERIAL RESPONSE NUT. 12 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.