The Seal,conical,flared Tube Fitting, cataloged under National Stock Number 4730-01-253-8771, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-253-8771 |
| Primary Part Number | DY90-C-5 |
| 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 | 0.416 INCHES NOMINAL IN |
| Outside Diameter | 0.416 INCHES NOMINAL IN |
| Body Length | 0.073 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Material | COPPER ALLOY |
| Hose/tube Outside Diameter for Which Designed | 0.313 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-C-5 PRIMARY | Del Aerospace Inc Dba Del Aerospace Inc (USA) |
| 3453-0186-1 PRIMARY | Mission Systems Orchard Park Inc (USA) |
| Reference | Meaning |
|---|---|
| 1660EG192 | 7/2 Vendor item drawing reference U.S. Government activity |
| DY90 | D/9 Drawing number reference only Del Aerospace Inc Dba Del Aerospace Inc |
NSN 4730-01-253-8771 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 4730-01-253-8771 has 2 manufacturer part numbers on file: DY90-C-5 (Del Aerospace Inc Dba Del Aerospace Inc), 3453-0186-1 (Mission Systems Orchard Park Inc).
Key specifications for DY90-C-5: Seat Angle in Deg: 37.0; Style Designator: SEAL; Overall Length: 0.500 INCHES NOMINAL IN; Wall Thickness: 0.416 INCHES NOMINAL 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.