The Reducer,pipe, cataloged under National Stock Number 4730-01-702-6990, 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 Ssp Fittings Corp. Government technical data includes 13 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 | 4730-01-702-6990 |
| Primary Part Number | ISST4AN4MC |
| Item Name | Reducer,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Ssp Fittings Corp |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.4375 INCHES FIRST END IN |
| Nominal Pipe Size Accommodated | 0.250 INCHES SECOND END IN |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Nominal Overall Length | 1.42 INCHES IN |
| Connection Type | THREADED EXTERNAL PIPE ALL ENDS |
| Style Designator | FLARED AND FLARELESS W/ BULKHEAD THREAD |
| Nominal Thread Size | 0.4375 INCHES FIRST END IN |
| Seat Angle | 37.1 DEGREES FIRST END |
| Media for Which Designed | FLUID SINGLE RESPONSE |
| Thread Quantity Per Inch | A20 FIRST END |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | ANPT FIRST END |
| Thread Series Designator | NPT SECOND END |
| 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 |
|---|---|
| ISST4AN4MC PRIMARY | Ssp Fittings Corp (USA) |
NSN 4730-01-702-6990 is a Reducer,pipe, manufactured by Ssp Fittings Corp, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-702-6990 has 1 manufacturer part number on file: ISST4AN4MC (Ssp Fittings Corp).
Key specifications for ISST4AN4MC: Nominal Pipe Size Accommodated: 0.4375 INCHES FIRST END IN; Nominal Pipe Size Accommodated: 0.250 INCHES SECOND END IN; Connection Style: PLAIN (PIPE) ALL ENDS; Nominal Overall Length: 1.42 INCHES IN. 13 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.