The Adapter,straight,flange to Boss, cataloged under National Stock Number 4730-01-057-9527, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-057-9527 |
| Item Name | Adapter,straight,flange to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Shape | RECTANGULAR WITH HOLES FIRST END |
| Flange Face Design | RAISED STRAIGHT FIRST END |
| Connection Style | GASKET SEAL (BOSS) SECOND END |
| Nominal Length | 2.500 INCHES FIRST END IN |
| Nominal Overall Length | 3.180 INCHES IN |
| Connection Type | THREADED INTERNAL BOSS SECOND END |
| Connection Type | FLANGE FIRST END |
| Bolt Hole Nominal Diameter | 0.345 INCHES FIRST END IN |
| Nominal Thread Size | 1.875 INCHES SECOND END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.945 INCHES FIRST END IN |
| Bolt Hole Quantity | 4 FIRST END |
| Surface Treatment | PASSIVATE OVERALL |
| Nominal Width | 2.500 INCHES FIRST END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 1.945 INCHES FIRST END IN |
| Thread Class | 3B SECOND END |
| Thread Quantity Per Inch | 12 SECOND END |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UN SECOND END |
| Raised Face Nominal Diameter | 2.120 INCHES FIRST END IN |
| Raised Face Nominal Height | 0.421 INCHES FIRST END IN |
| Nominal Thickness | 0.335 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 |
| Reference | Meaning |
|---|---|
| V2C11316-3TA | 3/2 Design control — primary reference U.S. Government activity |
| V3D10109 ITEM 28 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-057-9527 is a Adapter,straight,flange to Boss, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-057-9527: Flange Shape: RECTANGULAR WITH HOLES FIRST END; Flange Face Design: RAISED STRAIGHT FIRST END; Connection Style: GASKET SEAL (BOSS) SECOND END; Nominal Length: 2.500 INCHES FIRST END IN. 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.