The Tube Assembly,gearb, cataloged under National Stock Number 4710-00-021-4991, 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 Smiths Tubular Systems-Laconia, Inc. Div Lewis & Saunders. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4710-00-021-4991 |
| Primary Part Number | 500674 |
| Item Name | Tube Assembly,gearb |
| FSC / FSG | 4710 / 47 — Pipe, Tube and Rigid Tubing |
| Manufacturer | Smiths Tubular Systems-Laconia, Inc. Div Lewis & Saunders |
| Status | ACTIVE |
| FSC Application Data | ACFT ENGINE TF33 |
| General Characteristics Item Description | COMPONENTS,TUBE P-N 500673,PLATE P-N 388939,FERRULE P-N 388940,FERRULE P-N 390073 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 500674 | E.a. Patten Co Llc (USA) |
| 500674 PRIMARY | Smiths Tubular Systems-Laconia, Inc. Div Lewis & Saunders (USA) |
| 500674 PRIMARY | Kreisler Industrial Corporation (USA) |
| Reference | Meaning |
|---|---|
| 500674 | 5/9 Secondary reference Aero Tube Technologies, Llc Dba Tube Bends |
| 500674 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 500674 | 5/9 Secondary reference Pegasus Manufacturing, Inc. Dba Pegasus Manufacturing |
| 500674 | 5/9 Secondary reference U.S. Government activity |
| 500674 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 4710-00-021-4991 is a Tube Assembly,gearb, manufactured by Smiths Tubular Systems-Laconia, Inc. Div Lewis & Saunders, classified under FSC 4710, Pipe, Tube and Rigid Tubing. Status: active.
NSN 4710-00-021-4991 has 3 manufacturer part numbers on file: 500674 (E.a. Patten Co Llc), 500674 (Smiths Tubular Systems-Laconia, Inc. Div Lewis & Saunders), 500674 (Kreisler Industrial Corporation).
Key specifications for 500674: FSC Application Data: ACFT ENGINE TF33; General Characteristics Item Description: COMPONENTS,TUBE P-N 500673,PLATE P-N 388939,FERRULE P-N 388940,FERRULE P-N 390073. 2 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.
NSN 4710-00-021-4991 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.