The Reducer,boss, cataloged under National Stock Number 4730-01-150-0879, 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 U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 14 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-150-0879 |
| Primary Part Number | 12339405 |
| Item Name | Reducer,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Thread Tolerance Class | 6G EXTERNAL SECOND END G |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS |
| Thread Pitch in Millimeters | 1.5 SECOND END |
| Nominal Overall Length | 1.610 INCHES IN |
| Connection Type | THREADED EXTERNAL BOSS ALL ENDS |
| Nominal Thread Size | 18.0 MILLIMETERS SECOND END MM |
| Nominal Thread Size | 0.812 INCHES FIRST END IN |
| Media for Which Designed | FLUID SINGLE RESPONSE |
| Thread Class | 2A FIRST END A |
| Thread Quantity Per Inch | 16 FIRST END |
| Material | STEEL COMP 12L14 OVERALL |
| Thread Series Designator | UN FIRST END |
| Thread Series Designator | ISO S SECOND END |
| 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 |
|---|---|
| 12339405 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 14022700 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| 12339405 | Am General Llc (USA) |
| Reference | Meaning |
|---|---|
| 4730011500879 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 4730PL0355461 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 14022700 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| 5578336 | 5/9 Secondary reference Am General Llc |
NSN 4730-01-150-0879 is a Reducer,boss, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-150-0879 has 3 manufacturer part numbers on file: 12339405 (U S Army Tank Automotive Command Amsta-Im-Mm), 14022700 (General Motors Llc Dba General Motors Llc), 12339405 (Am General Llc).
Key specifications for 12339405: Thread Tolerance Class: 6G EXTERNAL SECOND END G; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS; Thread Pitch in Millimeters: 1.5 SECOND END; Nominal Overall Length: 1.610 INCHES IN. 14 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.