The Reducer,boss, cataloged under National Stock Number 4730-01-196-1157, 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 Naval Sea Systems Command. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-196-1157 |
| Primary Part Number | 5187846 |
| Item Name | Reducer,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Connection Style | GASKET SEAL (BOSS) ALL ENDS |
| Nominal Overall Length | 1.125 INCHES IN |
| Connection Type | THREADED INTERNAL BOSS ALL ENDS |
| Material Document and Classification | ASTM D-2133,GRADE 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 0.562 INCHES SECOND END IN |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Thread Class | 3B ALL ENDS |
| Material | PLASTIC OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| Reducer Type | CONCENTRIC |
| 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 |
|---|---|
| 5187846 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 4730PL1289946 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5187846 | 5/1 Secondary reference Raytheon Company |
NSN 4730-01-196-1157 is a Reducer,boss, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-196-1157 has 1 manufacturer part number on file: 5187846 (Naval Sea Systems Command).
Key specifications for 5187846: Connection Style: GASKET SEAL (BOSS) ALL ENDS; Nominal Overall Length: 1.125 INCHES IN; Connection Type: THREADED INTERNAL BOSS ALL ENDS; Material Document and Classification: ASTM D-2133,GRADE 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.