The Setscrew, cataloged under National Stock Number 5305-01-439-0273, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Waltron Bull & Roberts, Llc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-439-0273 |
| Primary Part Number | N417-0056-026 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Waltron Bull & Roberts, Llc |
| Status | ACTIVE |
| Fastener Length | 0.625 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | SQUARE |
| Thread Direction | RIGHT-HAND |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL 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 |
|---|---|
| N417-0056-026 PRIMARY | Waltron Bull & Roberts, Llc (USA) |
| N417-0056-026 PRIMARY | Lutz-Jesco America Corp (USA) |
| A-236786ITEM72 PRIMARY | Lutz-Jesco America Corp (USA) |
NSN 5305-01-439-0273 is a Setscrew, manufactured by Waltron Bull & Roberts, Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-439-0273 has 3 manufacturer part numbers on file: N417-0056-026 (Waltron Bull & Roberts, Llc), N417-0056-026 (Lutz-Jesco America Corp), A-236786ITEM72 (Lutz-Jesco America Corp).
Key specifications for N417-0056-026: Fastener Length: 0.625 INCHES NOMINAL IN; Nominal Thread Diameter: 0.250 INCHES IN; Head Style: SQUARE; Thread Direction: RIGHT-HAND. 8 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.