PartsTable TECHNICAL DATA SHEET

NSN 4730-01-422-3147Government record, cited

Reducer, Boss4730-01-422-3147

NSN 4730-01-422-3147 · NIIN 014223147 · Part number RYLB190

Ge Aviation Systems Llc Dba Ge Aviation Systems Llc · FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings · FSG 47 — Pipe, Tubing, Hose, and Fittings · CAGE 05624

Government record, cited

NSN 4730-01-422-3147 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-422-3147. Manufacturer of record part number: RYLB190.

Also searched as 4730-01-422-3147 · 4730014223147 · NIIN 014223147 · 01-422-3147 · FSC 4730 Hose, Pipe, Tube, Lubrication, and Railing Fittings · CAGE 05624 · RYLB190

Nearby stock numbers ← 4730-01-422-2829 Coupling Half, Quick Disconnect · 4730-01-422-3222 Nut, Hose Coupling →

4730-01-422-3147 — Hose, Pipe, Tube, Lubrication, and Railing Fittings

Features

Reducer,boss — FSC 4730
Connection Style: FLARED W/ GASKET SEAL (BOSS) ALL ENDS
Nominal Overall Length: 1.359 INCHES IN
Connection Type: THREADED EXTERNAL BOSS ALL ENDS
Material Document and Classification: QQ-Q-225/4,T6. FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Nominal Outside Diameter Tube Accommodated: 0.312 INCHES SECOND END IN
Nominal Outside Diameter Tube Accommodated: 0.750 INCHES FIRST END IN
Nominal Thread Size: 0.438 INCHES SECOND END IN

Identification

NSN: 4730-01-422-3147
NIIN: 014223147
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
FSG: 47 — Pipe, Tubing, Hose, and Fittings
Primary part number: RYLB190
Manufacturer: Ge Aviation Systems Llc Dba Ge Aviation Systems Llc

General Description

The Reducer,boss, cataloged under National Stock Number 4730-01-422-3147, 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 Ge Aviation Systems Llc Dba Ge Aviation Systems Llc. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4730-01-422-3147
Primary Part Number	RYLB190
Item Name	Reducer,boss
FSC / FSG	4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
Manufacturer	Ge Aviation Systems Llc Dba Ge Aviation Systems Llc
Status	ACTIVE
Connection Style	FLARED W/ GASKET SEAL (BOSS) ALL ENDS
Nominal Overall Length	1.359 INCHES IN
Connection Type	THREADED EXTERNAL BOSS ALL ENDS
Material Document and Classification	QQ-Q-225/4,T6. FED SPEC SINGLE MATERIAL RESPONSE OVERALL
Nominal Outside Diameter Tube Accommodated	0.312 INCHES SECOND END IN
Nominal Outside Diameter Tube Accommodated	0.750 INCHES FIRST END IN
Nominal Thread Size	0.438 INCHES SECOND END IN
Nominal Thread Size	0.500 INCHES FIRST END IN
Specification/standard Data	88044-AN919 GOVERNMENT STANDARD
Surface Treatment	ANODIZE OVERALL
Thread Class	3A ALL ENDS A
Material	ALUMINUM ALLOY OVERALL
Thread Series Designator	UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
Thread Series Designator	UNF SECOND END

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
RYLB190	Amg Diamond, Llc Dba Etaglobal, Llc (USA)
RYLB190 PRIMARY	Ge Aviation Systems Llc Dba Ge Aviation Systems Llc (USA)

Reference documents

Reference	Meaning
RYLB190	5/9 Secondary reference Blessing Our World, Inc. Dba Freedom Precision Hardware

No interchangeability data on file.

Other items in FSC 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

4730-00-000-1895

4730-00-000-1895 · Item name not on file

4730-00-000-4289

4730-00-000-4289 · Item name not on file

4730-00-000-4445

4730-00-000-4445 · Item name not on file

4730-00-000-8373

4730-00-000-8373 · Item name not on file

4730-00-000-8897

4730-00-000-8897 · Item name not on file

4730-00-001-0007

4730-00-001-0007 · Item name not on file

4730-00-001-0008

COUPLING,TUBE

4730-00-001-0008

COUPLING,TUBE

Frequently Asked Questions

What is NSN 4730-01-422-3147?

NSN 4730-01-422-3147 is a Reducer,boss, manufactured by Ge Aviation Systems Llc Dba Ge Aviation Systems Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.

What part numbers are listed for NSN 4730-01-422-3147?

NSN 4730-01-422-3147 has 2 manufacturer part numbers on file: RYLB190 (Amg Diamond, Llc Dba Etaglobal, Llc), RYLB190 (Ge Aviation Systems Llc Dba Ge Aviation Systems Llc).

What are the specifications of RYLB190?

Key specifications for RYLB190: Connection Style: FLARED W/ GASKET SEAL (BOSS) ALL ENDS; Nominal Overall Length: 1.359 INCHES IN; Connection Type: THREADED EXTERNAL BOSS ALL ENDS; Material Document and Classification: QQ-Q-225/4,T6. FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 14 specifications are documented in the U.S. Government catalog.

Is NSN 4730-01-422-3147 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

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.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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