The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-00-920-1234, 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. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-920-1234 |
| Primary Part Number | 4BCM4 |
| Item Name | Adapter,straight,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok |
| Status | ACTIVE |
| Furnished Items and Quantity | 2 FERRULE SLEEVE AND 1 TUBE COUPLING NUT AND 1 LOCKNUT |
| Connection Style | FLARELESS (TUBE) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Nominal Overall Length | 2.100 INCHES IN |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 0.438 INCHES CENTER BULKHEAD IN |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Nominal Thread Size | 0.250 INCHES SECOND END IN |
| Seat Angle | 20.0 DEGREES FIRST END |
| Media for Which Designed | HYDRAULIC FLUID SINGLE RESPONSE |
| Thread Class | 2A FIRST END A |
| Thread Class | 2A CENTER BULKHEAD A |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | UNF CENTER BULKHEAD |
| Thread Series Designator | NPT SECOND END |
| Thread Series Designator | UNF FIRST 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 |
|---|---|
| 4 MBC 4N-B | Parker-Hannifin Corporation Div Instrumentation Products Division (USA) |
| 4-4 FH2BZ-B | Parker-Hannifin Corporation Div Instrumentation Products Division (USA) |
| 4BCM4 PRIMARY | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
| B-400-11-4 PRIMARY | Swagelok Co (USA) |
| B-400-11-4 | Albany Valve & Fitting Co., Inc. (USA) |
| Reference | Meaning |
|---|---|
| 400-11-4 | 5/9 Secondary reference Swagelok Co |
NSN 4730-00-920-1234 is a Adapter,straight,pipe to Tube, manufactured by Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-920-1234 has 5 manufacturer part numbers on file: 4 MBC 4N-B (Parker-Hannifin Corporation Div Instrumentation Products Division), 4-4 FH2BZ-B (Parker-Hannifin Corporation Div Instrumentation Products Division), 4BCM4 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), B-400-11-4 (Swagelok Co), B-400-11-4 (Albany Valve & Fitting Co., Inc.).
4 possible matches (shared part number, not a government interchangeability claim): 5950-00-979-5906, 5935-01-005-9820, 6150-01-413-2359. Verify interchangeability with system specifications before substitution.
Key specifications for 4BCM4: Furnished Items and Quantity: 2 FERRULE SLEEVE AND 1 TUBE COUPLING NUT AND 1 LOCKNUT; Connection Style: FLARELESS (TUBE) FIRST END; Connection Style: PLAIN (PIPE) SECOND END; Nominal Overall Length: 2.100 INCHES IN. 19 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.