The Fitting,lubrication, cataloged under National Stock Number 4730-01-256-9056, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Heil Trailer International Llc. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-256-9056 |
| Primary Part Number | 500174-2 |
| Item Name | Fitting,lubrication |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Heil Trailer International Llc |
| Status | ACTIVE |
| Shank Length | 0.340 INCHES NOMINAL IN |
| Style Designator | STRAIGHT |
| Nominal Thread Size | 0.250 INCHES IN |
| Height | 0.680 INCHES NOMINAL IN |
| Screw Thread Series Designator | UNF |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Thread Class | 2A A |
| Material | STEEL 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 |
|---|---|
| 500174-2 | Heil Trailer International Llc (USA) |
| Reference | Meaning |
|---|---|
| 500174-2 | 3/9 Design control — primary reference Dana Corp Spicer Trailer Axle Plant |
NSN 4730-01-256-9056 is a Fitting,lubrication, manufactured by Heil Trailer International Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-256-9056 has 1 manufacturer part number on file: 500174-2 (Heil Trailer International Llc).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-500-4024. Verify interchangeability with system specifications before substitution.
Key specifications for 500174-2: Shank Length: 0.340 INCHES NOMINAL IN; Style Designator: STRAIGHT; Nominal Thread Size: 0.250 INCHES IN; Height: 0.680 INCHES NOMINAL IN. 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.