The Adapter,straight,flange to Boss, cataloged under National Stock Number 4730-00-083-5908, 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 Goodrich Aerospace Canada Ltd. Government technical data includes 13 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. 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 | 4730-00-083-5908 |
| Primary Part Number | 5257-5 |
| Item Name | Adapter,straight,flange to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Goodrich Aerospace Canada Ltd |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OUTSIDE |
| Union Joint Location | SECOND END |
| Nominal Length | 1.750 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 1.250 INCHES FIRST END IN |
| Bolt Hole Nominal Diameter | 0.193 INCHES FIRST END IN |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Bolt Hole Quantity | 2 FIRST END |
| Surface Treatment | CADMIUM OUTSIDE |
| Nominal Width | 0.875 INCHES FIRST END IN |
| Thread Class | 3A SECOND END A |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF SECOND END |
| Nominal Thickness | 0.187 INCHES FIRST END 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 |
|---|---|
| 5257-5 PRIMARY | Goodrich Aerospace Canada Ltd (CAN) |
NSN 4730-00-083-5908 is a Adapter,straight,flange to Boss, manufactured by Goodrich Aerospace Canada Ltd, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-083-5908 has 1 manufacturer part number on file: 5257-5 (Goodrich Aerospace Canada Ltd).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-459-5215. Verify interchangeability with system specifications before substitution.
Key specifications for 5257-5: Surface Treatment Document and Classification: QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OUTSIDE; Union Joint Location: SECOND END; Nominal Length: 1.750 INCHES FIRST END IN; Bolt Circle Nominal Diameter: 1.250 INCHES FIRST END IN. 13 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.