The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-041-5157, 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 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-041-5157 |
| Primary Part Number | 1SR4 |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Connection Style | GASKET SEAL ALL ENDS |
| Connection Type | EXTERNAL QUICK DISCONNECT ALL ENDS |
| Connection Type | THREADED INTERNAL HOSE FIRST FLUID END CONNECTION |
| Style Designator | MALE COUPLING HALF |
| Leg Length | 0.938 INCHES NOMINAL IN |
| Nominal Thread Size | 2.500 INCHES ALL ENDS IN |
| Thread Quantity Per Inch | 7-1/2 ALL ENDS |
| Material | ALUMINUM BODY |
| Quick Disconnect Method | PUSH-LOCK ALL ENDS |
| Thread Series Designator | NH ALL ENDS |
| 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 |
|---|---|
| 1SR4 | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 1SR4 | 5/9 Secondary reference Oshkosh Corp |
| RM1-105 | 3/9 Design control — primary reference Santa Rosa Mfg Co Inc |
| RMI-105 | 5/9 Secondary reference Santa Rosa Mfg Co Inc |
NSN 4730-01-041-5157 is a Coupling Half,quick Disconnect, manufactured by Oshkosh Defense Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-041-5157 has 1 manufacturer part number on file: 1SR4 (Oshkosh Defense Llc).
Key specifications for 1SR4: Connection Style: GASKET SEAL ALL ENDS; Connection Type: EXTERNAL QUICK DISCONNECT ALL ENDS; Connection Type: THREADED INTERNAL HOSE FIRST FLUID END CONNECTION; Style Designator: MALE COUPLING HALF. 10 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.