The Tube and Fittings,metallic, cataloged under National Stock Number 4710-01-259-1669, 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 11 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4710-01-259-1669 |
| Primary Part Number | A51L91535-37 |
| 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 | 8.5 FIRST END |
| Design Form | PREBENT |
| Mating End Quantity | 1 SECOND END |
| Mating End Quantity | 1 FIRST END |
| Wall Thickness | 0.073 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 1.250 INCHES SINGLE END IN |
| End Connection Style | SWIVEL NUT, INVERTED FLARE FIRST END |
| Tube Outside Diameter | 1.000 INCHES NOMINAL IN |
| Thread Class | 2B 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 |
|---|---|
| A51L91535-37 | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51L91535-37 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51L91535 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
| A51L91535-37 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51L91535-37 | 5/9 Secondary reference D F P Manufacturing Corp Dba D F P |
| A51L91535-37 | 5/2 Secondary reference U.S. Government activity |
NSN 4710-01-259-1669 is a Tube and Fittings,metallic, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4710, Pipe, Tube and Rigid Tubing. Status: active.
NSN 4710-01-259-1669 has 1 manufacturer part number on file: A51L91535-37 (Northrop Grumman Systems Corporation).
Key specifications for A51L91535-37: Seat Angle in Deg: 8.5 FIRST END; Design Form: PREBENT; Mating End Quantity: 1 SECOND END; Mating End Quantity: 1 FIRST END. 11 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.