The Tube Assembly,metal, cataloged under National Stock Number 4710-01-481-8330, is classified within Federal Supply Class 4710 (Pipe, Tube and Rigid Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Precision Aircraft Machining Company, Inc. Dba Pamco Div Precision Aircraft Machining Co Dba Pamco. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4710-01-481-8330 |
| Primary Part Number | HS4138-61-45 |
| Item Name | Tube Assembly,metal |
| FSC / FSG | 4710 / 47 — Pipe, Tube and Rigid Tubing |
| Manufacturer | Precision Aircraft Machining Company, Inc. Dba Pamco Div Precision Aircraft Machining Co Dba Pamco |
| Status | ACTIVE |
| Design Form | STRAIGHT |
| Mating End Quantity | 2 SINGLE END |
| Nominal Thread Size | 0.138 INCHES SINGLE END IN |
| End Connection Style | PLAIN SINGLE END |
| Tube Outside Diameter | 0.250 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 32 SINGLE END |
| Material | ALUMINUM TUBING |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SINGLE 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 |
|---|---|
| HS4138-61-45 PRIMARY | Precision Aircraft Machining Company, Inc. Dba Pamco Div Precision Aircraft Machining Co Dba Pamco (USA) |
| FT5337-61-45 PRIMARY | Fastener Technology Corp (USA) |
| Reference | Meaning |
|---|---|
| HS4138-61-45 | 7/2 Vendor item drawing reference The Boeing Company |
NSN 4710-01-481-8330 is a Tube Assembly,metal, manufactured by Precision Aircraft Machining Company, Inc. Dba Pamco Div Precision Aircraft Machining Co Dba Pamco, classified under FSC 4710, Pipe, Tube and Rigid Tubing. Status: active.
NSN 4710-01-481-8330 has 2 manufacturer part numbers on file: HS4138-61-45 (Precision Aircraft Machining Company, Inc. Dba Pamco Div Precision Aircraft Machining Co Dba Pamco), FT5337-61-45 (Fastener Technology Corp).
Key specifications for HS4138-61-45: Design Form: STRAIGHT; Mating End Quantity: 2 SINGLE END; Overall Length: 4.500 INCHES NOMINAL IN; Nominal Thread Size: 0.138 INCHES SINGLE END IN. 8 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.