The Elbow,flange to Tube, cataloged under National Stock Number 4730-01-138-7184, 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 Custom Hydraulic & Machine, Inc. Dba Custom Hydraulic & Machine Inc. Government technical data includes 21 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-138-7184 |
| Primary Part Number | 2621-166-03ASSY186 |
| Item Name | Elbow,flange to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Custom Hydraulic & Machine, Inc. Dba Custom Hydraulic & Machine Inc |
| Status | ACTIVE |
| Flange Shape | RECTANGULAR WITH HOLES SECOND END |
| Furnished Items and Quantity | 4 FLAT WASHER |
| Flow Angle | 90.0 DEGREES |
| Flange Face Design | PLAIN SECOND END |
| Connection Style | SOCKET (TUBE) FIRST END |
| Nominal Length | 1.750 INCHES SECOND END IN |
| Tubing Wall Nominal Thickness for Which Designed | 0.140 INCHES FIRST END IN |
| Connection Type | FLANGE SECOND END |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Material Document and Classification | QQ-A-225/8,T6 FED SPEC SINGLE MATERIAL RESPONSE SLEEVE |
| Material Document and Classification | QQ-S-763,CL 304,COND A FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Bolt Hole Nominal Diameter | 0.344 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.547 INCHES FIRST END IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 0.655 INCHES NOMINAL SECOND END IN |
| Leg Length | 0.963 INCHES NOMINAL FIRST END IN |
| Bolt Hole Quantity | 4 SECOND END |
| Nominal Width | 1.750 INCHES SECOND END IN |
| Material | STEEL CORROSION RESISTING BODY |
| Material | ALUMINUM ALLOY SLEEVE |
| Nominal Thickness | 1.310 INCHES SECOND END IN |
| 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 |
|---|---|
| 2621-166-03ASSY186 PRIMARY | Custom Hydraulic & Machine, Inc. Dba Custom Hydraulic & Machine Inc (USA) |
| Reference | Meaning |
|---|---|
| 845-4687601 | D/9 Drawing number reference only U.S. Government activity |
| 2621-166-03ASSY186 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-138-7184 is a Elbow,flange to Tube, manufactured by Custom Hydraulic & Machine, Inc. Dba Custom Hydraulic & Machine Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-138-7184 has 1 manufacturer part number on file: 2621-166-03ASSY186 (Custom Hydraulic & Machine, Inc. Dba Custom Hydraulic & Machine Inc).
Key specifications for 2621-166-03ASSY186: Flange Shape: RECTANGULAR WITH HOLES SECOND END; Furnished Items and Quantity: 4 FLAT WASHER; Flow Angle: 90.0 DEGREES; Flange Face Design: PLAIN SECOND END. 21 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.