The Tube and Fittings,metallic, cataloged under National Stock Number 4710-01-259-8214, 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 Northrop Grumman Systems Corporation. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4710-01-259-8214 |
| Primary Part Number | A51L21015-420 |
| Item Name | Tube and Fittings,metallic |
| FSC / FSG | 4710 / 47 — Pipe, Tube and Rigid Tubing |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Seat Angle in Deg | 30.0 SECOND END |
| Seat Angle in Deg | 8.5 FIRST END |
| Design Form | PREBENT |
| Mating End Quantity | 1 SECOND END |
| Mating End Quantity | 1 FIRST END |
| Material Document and Classification | TI3AL-2.5V, GRUMMAN AEROSPACE CORP MFR REF SINGLE MATERIAL RESPONSE FIRST END V |
| Material Document and Classification | AMS 5643 ASSN STD 1ST MATERIAL RESPONSE SECOND END |
| Wall Thickness | 0.020 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.562 INCHES SECOND END IN |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| End Connection Style | EXTERNAL SEAT OR GASKET SEAL SECOND END |
| End Connection Style | SWIVEL NUT, INVERTED FLARE FIRST END |
| Tube Outside Diameter | 0.250 INCHES NOMINAL IN |
| Thread Class | 3A SECOND END A |
| Thread Class | 3B FIRST END |
| Material | STEEL CORROSION RESISTING TUBING |
| Material | STEEL COMP 630 SECOND END |
| Material | TITANIUM ALLOY FIRST 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 |
|---|---|
| A51L21015-420 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51L21015-420 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51L21015-420 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51L21015 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
NSN 4710-01-259-8214 is a Tube and Fittings,metallic, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4710, Pipe, Tube and Rigid Tubing. Status: active.
NSN 4710-01-259-8214 has 1 manufacturer part number on file: A51L21015-420 (Northrop Grumman Systems Corporation).
2 possible matches (shared part number, not a government interchangeability claim): 4710-01-283-0148, 4710-01-287-1081. Verify interchangeability with system specifications before substitution.
Key specifications for A51L21015-420: Seat Angle in Deg: 30.0 SECOND END; Seat Angle in Deg: 8.5 FIRST END; Design Form: PREBENT; Mating End Quantity: 1 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.