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156-165 — VALVE,SAFETY RELIEF

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

156-165: VALVE,SAFETY RELIEF.

The VALVE,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: WOOL OVERALL, outside_diameter: 0.525 INCHES NOMINAL IN, style_designator: CIRCULAR, aperture_diameter: 0.312 INCHES NOMINAL IN, cross-sectional_width: 0.187 INCHES NOMINAL IN, cross-sectional_height: 0.1065 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-129-8674, 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
156-165
NSN: 4820-00-129-8674
NIINs: 001298674, 007296536
FSC: 4820 — Valves, Nonpowered
CAGE: 53655 — AVOX SYSTEMS INC DBA AVOX SYSTEMS INC (USA)
SPECIFICATIONS
materialWOOL OVERALL
outside_diameter0.525 INCHES NOMINAL IN
style_designatorCIRCULAR
aperture_diameter0.312 INCHES NOMINAL IN
cross-sectional_width0.187 INCHES NOMINAL IN
cross-sectional_height0.1065 INCHES NOMINAL IN
cross-sectional_shape_styleRECTANGULAR
NSN4820-00-129-8674
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 156-165 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
FLOW CONTROL DEVICE: DISK
•
CONNECTION STYLE: PLAIN (HOSE) FIRST END
•
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED: 0.250 INCHES FIRST END IN
•
STYLE DESIGNATOR: STRAIGHT THRU
•
DISK LOADING METHOD: SPRING
•
MATERIAL: PLASTIC BODY
•
VALVE OPERATION METHOD: AUTOMATIC
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEDISK
CONNECTION STYLEPLAIN (HOSE) FIRST END
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED0.250 INCHES FIRST END IN
STYLE DESIGNATORSTRAIGHT THRU
DISK LOADING METHODSPRING
MATERIALPLASTIC BODY
MATERIALSTEEL FLOW CONTROL DEVICE
VALVE OPERATION METHODAUTOMATIC
SUBSTITUTES & CROSS-REFERENCES 1
MILV81552Same 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 156-165?
156-165 is a VALVE,SAFETY RELIEF.
What parts can replace 156-165?
There is 1 known substitute for 156-165: MILV81552. Substitute compatibility should be verified for your specific system.
What is the NSN for 156-165?
156-165 is cataloged in the U.S. Government catalog under NSN 4820-00-129-8674. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.