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LHD8406 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

LHD8406: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, pressure_rating: 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS, special_features: USED ON 8.000INCH GATE VALVE IN, style_designator: PLAIN, seating_surface_shape: O-RING, stem_actuating_end_type: THREADED EXTERNALLY. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-259-1403, 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
LHD8406
NSN: 4820-01-259-1403
NIINs: 012591403, 012591500, 012591651
FSC: 4820 — Valves, Nonpowered
CAGE: 79342 — WILLIAM E WILLIAMS VALVE CORP (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
pressure_rating150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS
special_featuresUSED ON 8.000INCH GATE VALVE IN
style_designatorPLAIN
seating_surface_shapeO-RING
stem_actuating_end_typeTHREADED EXTERNALLY
valve_size_for_which_designed8.000 INCHES IN
valve_type_for_which_designedGATE
material_document_and_classificationASTM A182 GRADE F6 ASSN STD SINGLE MATERIAL RESPONSE
valve_model_number_for_which_designedMIL-15W3
NSN4820-01-259-1403
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: LHD8406 · 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
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL: STEEL BODY
•
SEATING SURFACE SHAPE: O-RING
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORPLAIN
MATERIALSTEEL BODY
MATERIALCOPPER ALLOY SEAT
SEATING SURFACE SHAPEO-RING
SUBSTITUTES & CROSS-REFERENCES 1
LHD8406 PC3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 LHD8406?
LHD8406 is a SEAT,VALVE.
What parts can replace LHD8406?
There is 1 known substitute for LHD8406: LHD8406 PC3. Substitute compatibility should be verified for your specific system.
What is the NSN for LHD8406?
LHD8406 is cataloged in the U.S. Government catalog under NSN 4820-01-259-1403. 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.