N1645421 — VALVE,SAFETY RELIEF

✓ Government record, cited

— · GATE VALVE

PRODUCT OVERVIEW

N1645421: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: STEEL BODY, bonnet_type: INSIDE SCREW, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN,OPTIONAL END(PIPE) ALL ENDS, special_features: ONE CAP-CHAIN, style_designator: ANGLE. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-875-5282, 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

N1645421

NSN: 4820-00-875-5282
FSC: 4820 — Valves, Nonpowered
CAGE: 55380 — HATCH & KIRK, INC. (USA)

SPECIFICATIONS

material	STEEL BODY
bonnet_type	INSIDE SCREW
connection_type	THREADED INTERNAL PIPE ALL ENDS
connection_style	PLAIN,OPTIONAL END(PIPE) ALL ENDS
special_features	ONE CAP-CHAIN
style_designator	ANGLE
thread_direction	RIGHT-HAND ALL ENDS
surface_treatment	PAINT LOCATION NOT OTHERWISE SPECIFIED
disk_loading_method	SPRING
flow_control_device	DISK
nominal_thread_size	0.500 INCHES ALL ENDS IN
valve_operation_method	AUTOMATIC
NSN	4820-00-875-5282

COMPONENT DIAGRAM

KEY FEATURES

•

FLOW CONTROL DEVICE: DISK

•

RENEWABLE SEAT RING TYPE: THREADED

•

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

•

CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDS

•

STYLE DESIGNATOR: ANGLE

•

BONNET TYPE: INSIDE SCREW

•

THREAD DIRECTION: RIGHT-HAND ALL ENDS

•

NOMINAL THREAD SIZE: 0.500 INCHES ALL ENDS IN

TECHNICAL CHARACTERISTICS

FLOW CONTROL DEVICE	DISK
RENEWABLE SEAT RING TYPE	THREADED
CONNECTION STYLE	PLAIN,OPTIONAL END(PIPE) ALL ENDS
CONNECTION TYPE	THREADED INTERNAL PIPE ALL ENDS
STYLE DESIGNATOR	ANGLE
BONNET TYPE	INSIDE SCREW
THREAD DIRECTION	RIGHT-HAND ALL ENDS
NOMINAL THREAD SIZE	0.500 INCHES ALL ENDS IN
DISK LOADING METHOD	SPRING
SPECIAL FEATURES	ONE CAP-CHAIN

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

1645421Reference document

Same NSN cross-reference

Reference document — Secondary reference

1645420Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is N1645421?

N1645421 is a VALVE,SAFETY RELIEF.

What parts can replace N1645421?

There are 2 known substitutes for N1645421: 1645421, 1645420. Substitute compatibility should be verified for your specific system.

What is the NSN for N1645421?

N1645421 is cataloged in the U.S. Government catalog under NSN 4820-00-875-5282. This indicates validated use in U.S. government and defense supply chains.

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N1645421 — VALVE,SAFETY RELIEF

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