665643 — VALVE,SAFETY RELIEF

✓ Government record, cited

— · GATE VALVE

PRODUCT OVERVIEW

665643: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY BODY, connection_style: PLAIN (PIPE) FIRST END, special_features: APERTURE DIAMETER: 0.125 IN. NOMINAL; MOUNTING POSITION: HORIZONTAL IN, style_designator: STRAIGHT THRU, thread_direction: RIGHT-HAND FIRST END, flow_control_device: DIAPHRAGM.

This part is cataloged in the U.S. Government catalog under NSN 4820-00-127-8991, 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

665643

NSN: 4820-00-127-8991
FSC: 4820 — Valves, Nonpowered
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)

SPECIFICATIONS

material	ALUMINUM ALLOY BODY
connection_style	PLAIN (PIPE) FIRST END
special_features	APERTURE DIAMETER: 0.125 IN. NOMINAL; MOUNTING POSITION: HORIZONTAL IN
style_designator	STRAIGHT THRU
thread_direction	RIGHT-HAND FIRST END
flow_control_device	DIAPHRAGM
nominal_thread_size	0.250 INCHES FIRST END IN
valve_operation_method	AUTOMATIC
thread_series_designator	NPT FIRST END
NSN	4820-00-127-8991

COMPONENT DIAGRAM

KEY FEATURES

•

FLOW CONTROL DEVICE: DIAPHRAGM

•

CONNECTION STYLE: PLAIN (PIPE) FIRST END

•

STYLE DESIGNATOR: STRAIGHT THRU

•

THREAD DIRECTION: RIGHT-HAND FIRST END

•

NOMINAL THREAD SIZE: 0.250 INCHES FIRST END IN

•

MATERIAL: RUBBER SYNTHETIC FLOW CONTROL DEVICE

TECHNICAL CHARACTERISTICS

FLOW CONTROL DEVICE	DIAPHRAGM
CONNECTION STYLE	PLAIN (PIPE) FIRST END
STYLE DESIGNATOR	STRAIGHT THRU
THREAD DIRECTION	RIGHT-HAND FIRST END
NOMINAL THREAD SIZE	0.250 INCHES FIRST END IN
SPECIAL FEATURES	APERTURE DIAMETER: 0.125 IN. NOMINAL; MOUNTING POSITION: HORIZONTAL IN
MATERIAL	RUBBER SYNTHETIC FLOW CONTROL DEVICE
MATERIAL	ALUMINUM ALLOY BODY
THREAD SERIES DESIGNATOR	NPT FIRST END
VALVE OPERATION METHOD	AUTOMATIC

OTHER ITEMS IN FSC 4820 — Valves, Nonpowered

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

4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230

SUBSTITUTES & CROSS-REFERENCES 1

671114Reference document

Same NSN cross-reference

Reference document — Secondary 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 665643?

665643 is a VALVE,SAFETY RELIEF.

What parts can replace 665643?

There is 1 known substitute for 665643: 671114. Substitute compatibility should be verified for your specific system.

What is the NSN for 665643?

665643 is cataloged in the U.S. Government catalog under NSN 4820-00-127-8991. This indicates validated use in U.S. government and defense supply chains.

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