The Elbow,pipe to Boss, cataloged under National Stock Number 4730-01-154-9705, 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 16 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 4730-01-154-9705 |
| Primary Part Number | 2621-021-02ASSY54 |
| Item Name | Elbow,pipe to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Custom Hydraulic & Machine, Inc. Dba Custom Hydraulic & Machine Inc |
| Status | ACTIVE |
| Flow Angle | 90.0 DEGREES |
| Nominal Pipe Size Accommodated | 1.000 INCHES FIRST END IN |
| Connection Style | SOCKET (PIPE) FIRST END |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Material Document and Classification | QQ-S-763,CL304,COND A FED SPEC SINGLE MATERIAL RESPONSE ELBOW |
| Material Document and Classification | QQ-S-763,CL304,COND A FED SPEC SINGLE MATERIAL RESPONSE TAILPIECE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 3.000 INCHES NOMINAL FIRST END IN |
| Nominal Thread Size | 1.312 INCHES SECOND END IN |
| Thread Class | 2A SECOND END A |
| Thread Quantity Per Inch | 12 SECOND END |
| Material | STEEL COMP 304 ELBOW |
| Material | STEEL COMP 304 TAILPIECE |
| Thread Series Designator | UN 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 |
|---|---|
| 2621-021-02ASSY54 PRIMARY | Custom Hydraulic & Machine, Inc. Dba Custom Hydraulic & Machine Inc (USA) |
| Reference | Meaning |
|---|---|
| 516-4682514 | D/9 Drawing number reference only U.S. Government activity |
| 2621-021-02ASSY54 | 5/9 Secondary reference Mindeco Corp |
| 516-4682514F1 | 5/2 Secondary reference U.S. Government activity |
| 2621-021-02 | D/9 Drawing number reference only U.S. Government activity |
| 2621-021-02ASSY54 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-154-9705 is a Elbow,pipe to Boss, 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 4730-01-154-9705 has 1 manufacturer part number on file: 2621-021-02ASSY54 (Custom Hydraulic & Machine, Inc. Dba Custom Hydraulic & Machine Inc).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-155-5053. Verify interchangeability with system specifications before substitution.
Key specifications for 2621-021-02ASSY54: Flow Angle: 90.0 DEGREES; Nominal Pipe Size Accommodated: 1.000 INCHES FIRST END IN; Connection Style: SOCKET (PIPE) FIRST END; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END. 16 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.