The Seal,conical,flared Tube Fitting, cataloged under National Stock Number 4730-01-070-8581, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Del Aerospace Inc Dba Del Aerospace Inc. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-070-8581 |
| Primary Part Number | DY90-N-20 |
| Item Name | Seal,conical,flared Tube Fitting |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Del Aerospace Inc Dba Del Aerospace Inc |
| Status | ACTIVE |
| Seat Angle in Deg | 37.0 |
| Style Designator | SEAL |
| Wall Thickness | 0.009 INCHES MINIMUM AND 0.011 INCHES MAXIMUM IN |
| Outside Diameter | 1.501 INCHES MINIMUM AND 1.506 INCHES MAXIMUM IN |
| Body Length | 0.110 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Casehardening Indicator | CASEHARDENED |
| Material | NICKEL ALLOY |
| Hose/tube Outside Diameter for Which Designed | 1.250 INCHES NOMINAL IN |
| 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 |
|---|---|
| DY90-N-20 PRIMARY | Del Aerospace Inc Dba Del Aerospace Inc (USA) |
| SEC07N20 PRIMARY | Seco Seals, Inc (USA) |
| Reference | Meaning |
|---|---|
| BACS11AH20N | 3/2 Design control — primary reference U.S. Government activity |
| 7N20 | 5/9 Secondary reference Seco Seals, Inc |
| BACS11AM20N | 5/9 Secondary reference U.S. Government activity |
| DY90 | D/9 Drawing number reference only Del Aerospace Inc Dba Del Aerospace Inc |
NSN 4730-01-070-8581 is a Seal,conical,flared Tube Fitting, manufactured by Del Aerospace Inc Dba Del Aerospace Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-070-8581 has 2 manufacturer part numbers on file: DY90-N-20 (Del Aerospace Inc Dba Del Aerospace Inc), SEC07N20 (Seco Seals, Inc).
Key specifications for DY90-N-20: Seat Angle in Deg: 37.0; Style Designator: SEAL; Wall Thickness: 0.009 INCHES MINIMUM AND 0.011 INCHES MAXIMUM IN; Outside Diameter: 1.501 INCHES MINIMUM AND 1.506 INCHES MAXIMUM 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.