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31M 38 — DIAPHRAGM,VALVE,FLAT

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

31M 38: DIAPHRAGM,VALVE,FLAT.

The DIAPHRAGM,VALVE,FLAT is a the manufacturer industrial component. Key specifications include material: RUBBER, hole_diameter: 0.515 INCHES NOMINAL IN, outside_diameter: 15.125 INCHES NOMINAL IN, style_designator: FLAT, bolt_hole_quantity: 30, material_thickness: 0.132 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-050-4634, 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
31M 38
NSN: 4820-01-050-4634
FSC: 4820 — Valves, Nonpowered
CAGE: 21013 — METREX VALVE CORP. DBA METREX VALVE CORP (USA)
SPECIFICATIONS
materialRUBBER
hole_diameter0.515 INCHES NOMINAL IN
outside_diameter15.125 INCHES NOMINAL IN
style_designatorFLAT
bolt_hole_quantity30
material_thickness0.132 INCHES NOMINAL IN
bolt_circle_diameter13.625 INCHES NOMINAL IN
center_hole_diameter0.750 INCHES NOMINAL IN
NSN4820-01-050-4634
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 31M 38 · 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: 15.125 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLAT
•
MATERIAL THICKNESS: 0.132 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 30
•
BOLT CIRCLE DIAMETER: 13.625 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 0.750 INCHES NOMINAL IN
•
MATERIAL: RUBBER
•
HOLE DIAMETER: 0.515 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER15.125 INCHES NOMINAL IN
STYLE DESIGNATORFLAT
MATERIAL THICKNESS0.132 INCHES NOMINAL IN
BOLT HOLE QUANTITY30
BOLT CIRCLE DIAMETER13.625 INCHES NOMINAL IN
CENTER HOLE DIAMETER0.750 INCHES NOMINAL IN
MATERIALRUBBER
HOLE DIAMETER0.515 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
YM-3145PIECE46Reference document
Same NSN cross-reference
Reference document — Secondary reference
YM-3145Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 31M 38?
31M 38 is a DIAPHRAGM,VALVE,FLAT.
What parts can replace 31M 38?
There are 2 known substitutes for 31M 38: YM-3145PIECE46, YM-3145. Substitute compatibility should be verified for your specific system.
What is the NSN for 31M 38?
31M 38 is cataloged in the U.S. Government catalog under NSN 4820-01-050-4634. 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.