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H186-31-3 — DIAPHRAGM,ACTUATOR VALVE,SPECIAL

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

H186-31-3: DIAPHRAGM,ACTUATOR VALVE,SPECIAL.

DIAPHRAGM,ACTUATOR VALVE,SPECIAL. Key specifications include material: RUBBER, overall_height: 0.440 INCHES NOMINAL IN, outside_diameter: 2.000 INCHES NOMINAL IN, style_designator: SPECIAL SHAPED, material_thickness: 0.060 INCHES NOMINAL IN, taper_major_diameter: 1.575 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-187-1480, 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
H186-31-3
NSN: 4820-01-187-1480
FSC: 4820 — Valves, Nonpowered
CAGE: 35301 — DRESSER INDUSTRIES INC LEROI DIV (USA)
SPECIFICATIONS
materialRUBBER
overall_height0.440 INCHES NOMINAL IN
outside_diameter2.000 INCHES NOMINAL IN
style_designatorSPECIAL SHAPED
material_thickness0.060 INCHES NOMINAL IN
taper_major_diameter1.575 INCHES NOMINAL IN
taper_minor_diameter1.295 INCHES NOMINAL IN
NSN4820-01-187-1480
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: H186-31-3 · 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
•
OUTSIDE DIAMETER: 2.000 INCHES NOMINAL IN
•
TAPER MINOR DIAMETER: 1.295 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SPECIAL SHAPED
•
TAPER MAJOR DIAMETER: 1.575 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.060 INCHES NOMINAL IN
•
MATERIAL: RUBBER
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.440 INCHES NOMINAL IN
OUTSIDE DIAMETER2.000 INCHES NOMINAL IN
TAPER MINOR DIAMETER1.295 INCHES NOMINAL IN
STYLE DESIGNATORSPECIAL SHAPED
TAPER MAJOR DIAMETER1.575 INCHES NOMINAL IN
MATERIAL THICKNESS0.060 INCHES NOMINAL IN
MATERIALRUBBER
SUBSTITUTES & CROSS-REFERENCES 1
H186-31-2Reference 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 H186-31-3?
H186-31-3 is a DIAPHRAGM,ACTUATOR VALVE,SPECIAL.
What parts can replace H186-31-3?
There is 1 known substitute for H186-31-3: H186-31-2. Substitute compatibility should be verified for your specific system.
What is the NSN for H186-31-3?
H186-31-3 is cataloged in the U.S. Government catalog under NSN 4820-01-187-1480. 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.