R121W4-.5 — RESTRICTOR,FLUID FLOW

✓ Government record, cited

— · HOSE FITTING

PRODUCT OVERVIEW

R121W4-.5: RESTRICTOR,FLUID FLOW.

The RESTRICTOR,FLUID FLOW is a the manufacturer industrial component. Key specifications include length: 3.375 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING, design_type: TUBULAR, HEX SHAPE, thread_class: 3B FIRST PROVISION, thread_length: 0.438 INCHES NOMINAL FIRST PROVISION IN, thread_series: UNF SECOND PROVISION. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-070-9601, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

R121W4-.5

NSN: 4730-00-070-9601
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 79326 — TRANSDIGM INC DIV ADELWIGGINS GROUP (USA)

SPECIFICATIONS

length	3.375 INCHES NOMINAL IN
material	STEEL CORROSION RESISTING
design_type	TUBULAR, HEX SHAPE
thread_class	3B FIRST PROVISION
thread_length	0.438 INCHES NOMINAL FIRST PROVISION IN
thread_series	UNF SECOND PROVISION
orifice_diameter	0.172 INCHES NOMINAL IN
outside_diameter	1.375 INCHES NOMINAL IN
special_features	LOCKWIRE HOLES
thread_provision	THREADED LOCATION NOT OTHERWISE SPECIFIED
surface_treatment	PASSIVATE
thread_size_designator	0.438 SECOND PROVISION
NSN	4730-00-070-9601

COMPONENT DIAGRAM

KEY FEATURES

•

LENGTH: 3.375 INCHES NOMINAL IN

•

THREAD PROVISION: THREADED LOCATION NOT OTHERWISE SPECIFIED

•

DESIGN TYPE: TUBULAR, HEX SHAPE

•

THREAD SERIES: UNF SECOND PROVISION

•

THREAD LENGTH: 0.438 INCHES NOMINAL FIRST PROVISION IN

•

HOSE/TUBE SIZE FOR WHICH DESIGNED: 1/4 IN. TUBE OD IN

TECHNICAL CHARACTERISTICS

LENGTH	3.375 INCHES NOMINAL IN
THREAD PROVISION	THREADED LOCATION NOT OTHERWISE SPECIFIED
DESIGN TYPE	TUBULAR, HEX SHAPE
THREAD SERIES	UNF SECOND PROVISION
THREAD SERIES	UNF FIRST PROVISION
THREAD LENGTH	0.438 INCHES NOMINAL FIRST PROVISION IN
THREAD LENGTH	0.438 INCHES NOMINAL SECOND PROVISION IN
HOSE/TUBE SIZE FOR WHICH DESIGNED	1/4 IN. TUBE OD IN
OUTSIDE DIAMETER	1.375 INCHES NOMINAL IN
THREAD SIZE DESIGNATOR	0.438 FIRST PROVISION

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 4730-00-000-4289 4730-00-000-4445 4730-00-000-8373 4730-00-000-8897 4730-00-001-0007 4730-00-001-0008

SUBSTITUTES & CROSS-REFERENCES 2

Q642-05-0.5Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

2312620PC1Reference document

Same NSN cross-reference

Reference document — Vendor item drawing reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is R121W4-.5?

R121W4-.5 is a RESTRICTOR,FLUID FLOW.

What parts can replace R121W4-.5?

There are 2 known substitutes for R121W4-.5: Q642-05-0.5, 2312620PC1. Substitute compatibility should be verified for your specific system.

What is the NSN for R121W4-.5?

R121W4-.5 is cataloged in the U.S. Government catalog under NSN 4730-00-070-9601. This indicates validated use in U.S. government and defense supply chains.

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