The Tube and Fittings,metallic, cataloged under National Stock Number 4710-01-259-1672, 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 B/e Aerospace Inc Dba Interturbine Div Altis Aerospace Systems Llc. Government technical data includes 12 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4710-01-259-1672 |
| Primary Part Number | A51L21100-107 TC1 |
| Item Name | Tube and Fittings,metallic |
| FSC / FSG | 4710 / 47 — Pipe, Tube and Rigid Tubing |
| Manufacturer | B/e Aerospace Inc Dba Interturbine Div Altis Aerospace Systems Llc |
| Status | ACTIVE |
| Seat Angle in Deg | 8.5 SINGLE END |
| Design Form | PREBENT |
| Mating End Quantity | 2 SINGLE END |
| Wall Thickness | 0.020 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND SINGLE END |
| Nominal Thread Size | 0.562 INCHES SINGLE END IN |
| End Connection Style | SWIVEL NUT, INVERTED FLARE SINGLE END |
| Tube Outside Diameter | 0.250 INCHES NOMINAL IN |
| Thread Class | 3B SINGLE END |
| Material | STEEL CORROSION RESISTING TUBING |
| Material | TITANIUM SINGLE END |
| Thread Series Designator | UNJS 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 |
|---|---|
| A51L21100-107 TC1 | B/e Aerospace Inc Dba Interturbine Div Altis Aerospace Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| A51L21100-107 TC1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51L21100-107 TC1 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51L21100-107 TC1 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| A51L21100-107 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51L21100 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
NSN 4710-01-259-1672 is a Tube and Fittings,metallic, manufactured by B/e Aerospace Inc Dba Interturbine Div Altis Aerospace Systems Llc, classified under FSC 4710, Pipe, Tube and Rigid Tubing. Status: active.
NSN 4710-01-259-1672 has 1 manufacturer part number on file: A51L21100-107 TC1 (B/e Aerospace Inc Dba Interturbine Div Altis Aerospace Systems Llc).
1 possible match (shared part number, not a government interchangeability claim): 4710-01-259-2406. Verify interchangeability with system specifications before substitution.
Key specifications for A51L21100-107 TC1: Seat Angle in Deg: 8.5 SINGLE END; Design Form: PREBENT; Mating End Quantity: 2 SINGLE END; Wall Thickness: 0.020 INCHES NOMINAL IN. 12 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.