639AS1366 — VALVE,SAFETY RELIEF

✓ Government record, cited

— · GATE VALVE

PRODUCT OVERVIEW

639AS1366: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 SEAT, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN,OPTIONAL END(PIPE) ALL ENDS, special_features: LOCKWIRE, style_designator: STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF SEPARABLE SECTIONS., thread_direction: RIGHT-HAND ALL ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-057-6793, 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

639AS1366

NSN: 4820-01-057-6793
FSC: 4820 — Valves, Nonpowered
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)

SPECIFICATIONS

material	STEEL COMP 303 SEAT
connection_type	THREADED INTERNAL PIPE ALL ENDS
connection_style	PLAIN,OPTIONAL END(PIPE) ALL ENDS
special_features	LOCKWIRE
style_designator	STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF SEPARABLE SECTIONS.
thread_direction	RIGHT-HAND ALL ENDS
surface_treatment	PASSIVATE LOCATION NOT OTHERWISE SPECIFIED
disk_loading_method	SPRING
flow_control_device	POPPET
nominal_thread_size	0.250 INCHES ALL ENDS IN
maximum_operating_temp	250.0 FAHRENHEIT SINGLE RESPONSE DEGF
valve_operation_method	AUTOMATIC
NSN	4820-01-057-6793

COMPONENT DIAGRAM

KEY FEATURES

•

FLOW CONTROL DEVICE: POPPET

•

CONNECTION STYLE: PLAIN,OPTIONAL END(PIPE) ALL ENDS

•

CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDS

•

STYLE DESIGNATOR: STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF SEPARABLE SECTIONS.

•

MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582,TYPE 303,COND A ASSN STD SINGLE MATERIAL RESPONSE BODY

•

THREAD DIRECTION: RIGHT-HAND ALL ENDS

TECHNICAL CHARACTERISTICS

FLOW CONTROL DEVICE	POPPET
CONNECTION STYLE	PLAIN,OPTIONAL END(PIPE) ALL ENDS
CONNECTION TYPE	THREADED INTERNAL PIPE ALL ENDS
STYLE DESIGNATOR	STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF SEPARABLE SECTIONS.
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM A582,TYPE 303,COND A ASSN STD SINGLE MATERIAL RESPONSE BODY
MATERIAL DOCUMENT AND CLASSIFICATION	ASTM A582,TYPE 303,COND A ASSN STD SINGLE MATERIAL RESPONSE SEAT
MATERIAL DOCUMENT AND CLASSIFICATION	L-P-410 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
THREAD DIRECTION	RIGHT-HAND ALL ENDS
NOMINAL THREAD SIZE	0.250 INCHES ALL ENDS IN
MAXIMUM OPERATING TEMP	250.0 FAHRENHEIT SINGLE RESPONSE DEGF

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 2

5349T-2PP-L-5500Reference document

Same NSN cross-reference

Reference document — Secondary reference

639AS1366-2Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

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 639AS1366?

639AS1366 is a VALVE,SAFETY RELIEF.

What parts can replace 639AS1366?

There are 2 known substitutes for 639AS1366: 5349T-2PP-L-5500, 639AS1366-2. Substitute compatibility should be verified for your specific system.

What is the NSN for 639AS1366?

639AS1366 is cataloged in the U.S. Government catalog under NSN 4820-01-057-6793. This indicates validated use in U.S. government and defense supply chains.

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