The Coupling,tube, cataloged under National Stock Number 4730-01-657-3504, 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 Oshkosh Defense Llc. Government technical data includes 11 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 | 4730-01-657-3504 |
| Primary Part Number | 1852570 |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Recess Nominal Depth | 0.750 INCHES FIRST END IN |
| Recess Nominal Depth | 0.875 INCHES SECOND END IN |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Nominal Overall Length | 1.88 INCHES IN |
| Connection Type | THREADED INTERNAL TUBE ALL ENDS |
| Style Designator | PLAIN |
| Nominal Thread Size | 0.25 INCHES ALL ENDS IN |
| Nominal Outside Diameter | 0.75 INCHES ALL ENDS IN |
| Thread Quantity Per Inch | 28 SECOND END |
| Thread Quantity Per Inch | 20 FIRST END |
| Material | COPPER ALLOY 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 |
|---|---|
| 1852570 PRIMARY | Oshkosh Defense Llc (USA) |
NSN 4730-01-657-3504 is a Coupling,tube, manufactured by Oshkosh Defense Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-657-3504 has 1 manufacturer part number on file: 1852570 (Oshkosh Defense Llc).
Key specifications for 1852570: Recess Nominal Depth: 0.750 INCHES FIRST END IN; Recess Nominal Depth: 0.875 INCHES SECOND END IN; Connection Style: PLAIN (TUBE) ALL ENDS; Nominal Overall Length: 1.88 INCHES IN. 11 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.