The Reducer,pipe, cataloged under National Stock Number 4730-00-623-8303, 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 Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Reducer,pipe |
| FSC / FSG | 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings (FSG 47) |
| Manufacturers | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (CAGE 28968); Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division (CAGE 30780); Sae International Dba Sae International (CAGE 0U583) |
| Parameter | Value |
|---|---|
| NSN | 4730-00-623-8303 |
| Primary Part Number | 4RAP2BR |
| Item Name | Reducer,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok |
| Status | ACTIVE |
| 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 |
|---|---|
| 4RAP2BR PRIMARY | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
| 1/4-1/8 FG-B PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division (USA) |
| SAE J514-3 4-2 140139B PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| 1/4-1/8 FG-B | 5/9 Secondary reference U.S. Government activity |
| 1/4-1/8FG-B | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
| 4RAP2 | 5/9 Secondary reference Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok |
| 4-2 140139B | 5/9 Secondary reference U.S. Government activity |
| SAE-J514-3 | 3/1 Design control — primary reference Sae International Dba Sae International |
| 444012 | 5/9 Secondary reference Navistar International Corporation Dba Navistar |
| 444012 | 3/2 Design control — primary reference U.S. Government activity |
| SAE-J514 | 5/9 Secondary reference Sae International Dba Sae International |
| 11024955 | 7/2 Vendor item drawing reference Combat Capabilities Development Command Armaments Center Dba Us Army Combat Capabilities Development Command Armaments Center |
| 4-2 140139B | 5/9 Secondary reference Sae International Dba Sae International |
| J514 | 5/1 Secondary reference Sae International Dba Sae International |
| 2540006238303 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| SAE J514 4-2 140139B | 5/9 Secondary reference Sae International Dba Sae International |
| J514 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-623-8303 is a Reducer,pipe, manufactured by Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-623-8303 has 3 manufacturer part numbers on file: 4RAP2BR (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), 1/4-1/8 FG-B (Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division), SAE J514-3 4-2 140139B (Sae International Dba Sae International).
1 possible match (shared part number, not a government interchangeability claim): 5130-01-644-6352. Verify interchangeability with system specifications before substitution.
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.