The Setscrew, cataloged under National Stock Number 5305-01-173-5039, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Long-Lok Llc. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-173-5039 |
| Primary Part Number | LP57XD26K4X2 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Long-Lok Llc |
| Status | ACTIVE |
| Spline Minor Diameter | 0.380 INCHES NOMINAL IN |
| Fastener Length | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Spline Width | 0.016 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN |
| Spline Major Diameter | 0.049 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.080 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | CUP |
| Locking Feature | STRIP THREADS |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | FOUR SPLINE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 56 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| LP57XD26K4X2 PRIMARY | Long-Lok Llc (USA) |
| Reference | Meaning |
|---|---|
| 048700-4 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5305-01-173-5039 is a Setscrew, manufactured by Long-Lok Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-173-5039 has 1 manufacturer part number on file: LP57XD26K4X2 (Long-Lok Llc).
Key specifications for LP57XD26K4X2: Spline Minor Diameter: 0.380 INCHES NOMINAL IN; Fastener Length: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN; Spline Width: 0.016 INCHES MINIMUM AND 0.017 INCHES MAXIMUM IN; Spline Major Diameter: 0.049 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN. 16 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.