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NB31815579 — DIAPHRAGM,VALVE,FLAT

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

NB31815579: DIAPHRAGM,VALVE,FLAT.

The DIAPHRAGM,VALVE,FLAT is a the manufacturer industrial component. Key specifications include material: RUBBER, hole_diameter: 0.500 INCHES NOMINAL IN, pressure_rating: 250.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS, outside_diameter: 11.625 INCHES NOMINAL IN, style_designator: FLAT, bolt_hole_quantity: 12. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-252-3868, 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
NB31815579
NSN: 4820-01-252-3868
FSC: 4820 — Valves, Nonpowered
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
materialRUBBER
hole_diameter0.500 INCHES NOMINAL IN
pressure_rating250.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
outside_diameter11.625 INCHES NOMINAL IN
style_designatorFLAT
bolt_hole_quantity12
material_thickness0.125 INCHES NOMINAL IN
bolt_circle_diameter10.625 INCHES NOMINAL IN
center_hole_diameter1.000 INCHES NOMINAL IN
NSN4820-01-252-3868
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: NB31815579 · 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
•
PRESSURE RATING: 250.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
•
OUTSIDE DIAMETER: 11.625 INCHES NOMINAL IN
•
STYLE DESIGNATOR: FLAT
•
MATERIAL THICKNESS: 0.125 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 12
•
BOLT CIRCLE DIAMETER: 10.625 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 1.000 INCHES NOMINAL IN
•
MATERIAL: RUBBER
TECHNICAL CHARACTERISTICS
PRESSURE RATING250.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS
OUTSIDE DIAMETER11.625 INCHES NOMINAL IN
STYLE DESIGNATORFLAT
MATERIAL THICKNESS0.125 INCHES NOMINAL IN
BOLT HOLE QUANTITY12
BOLT CIRCLE DIAMETER10.625 INCHES NOMINAL IN
CENTER HOLE DIAMETER1.000 INCHES NOMINAL IN
MATERIALRUBBER
HOLE DIAMETER0.500 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 3
218-155-79Reference document
Same NSN cross-reference
Reference document — Secondary reference
N-736 PIECE 7Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
N-736Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is NB31815579?
NB31815579 is a DIAPHRAGM,VALVE,FLAT.
What parts can replace NB31815579?
There are 3 known substitutes for NB31815579: 218-155-79, N-736 PIECE 7, N-736. Substitute compatibility should be verified for your specific system.
What is the NSN for NB31815579?
NB31815579 is cataloged in the U.S. Government catalog under NSN 4820-01-252-3868. 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.