The Stud,turnlock Fastener, cataloged under National Stock Number 5325-01-258-1835, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Fastener Innovation Technology, Inc. Dba F I T. Government technical data includes 13 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-258-1835 |
| Primary Part Number | FIT3063-3 |
| Item Name | Stud,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Fastener Innovation Technology, Inc. Dba F I T |
| Status | ACTIVE |
| Width Across Flats | 0.484 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Drive Type | KNURLED |
| Turnlock Stud Shank Style | STUD SHANK |
| Material Document and Classification | AMS5528 ASSN STD SINGLE MATERIAL RESPONSE RETAINER |
| Material Document and Classification | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5734 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5735 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE STUD |
| Stud Head Height | 0.210 INCHES NOMINAL IN |
| Securing Device Type | RING |
| Turnlock Stud Head Style | HEXAGON |
| Minor Diameter | 0.373 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING STUD |
| Material | STEEL RETAINER |
| Stud Thread Size and Series/type Designator | 0.250-28 UNF |
| Grip Length | 0.251 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN |
| 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 |
|---|---|
| FIT3063-3 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| FT5121 | Fastener Technology Corp (USA) |
| Reference | Meaning |
|---|---|
| 10119331 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| DNH1055-1A-8 | 5/9 Secondary reference Huck International, Inc |
| DNH1055-1A-8 | 5/9 Secondary reference Huck International, Inc. Div Huck Products Division |
| 971259-2C | 7/2 Vendor item drawing reference U.S. Government activity |
| DNH1055-1A-8 | 5/9 Secondary reference U.S. Government activity |
NSN 5325-01-258-1835 is a Stud,turnlock Fastener, manufactured by Fastener Innovation Technology, Inc. Dba F I T, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-258-1835 has 2 manufacturer part numbers on file: FIT3063-3 (Fastener Innovation Technology, Inc. Dba F I T), FT5121 (Fastener Technology Corp).
Key specifications for FIT3063-3: Width Across Flats: 0.484 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Drive Type: KNURLED; Turnlock Stud Shank Style: STUD SHANK; Material Document and Classification: AMS5528 ASSN STD SINGLE MATERIAL RESPONSE RETAINER. 13 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.