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499505760023940 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

499505760023940: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, seat_radius: 45.750 INCHES NOMINAL IN, taper_length: 0.125 INCHES NOMINAL IN, thread_class: 2A SINGLE THREADED PORTION A, thread_length: 0.188 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 3.885 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-145-0987, 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
499505760023940
NSN: 4820-01-145-0987
FSC: 4820 — Valves, Nonpowered
CAGE: 09032 — TATE ANDALE, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
seat_radius45.750 INCHES NOMINAL IN
taper_length0.125 INCHES NOMINAL IN
thread_class2A SINGLE THREADED PORTION A
thread_length0.188 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter3.885 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
nominal_thread_size4.000 INCHES SINGLE THREADED PORTION IN
under_flange_height0.750 INCHES NOMINAL IN
body_inside_diameter0.500 INCHES NOMINAL IN
seating_surface_shapeRADIAL
thread_quantity_per_inch12 SINGLE THREADED PORTION
NSN4820-01-145-0987
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 499505760023940 · 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
•
FLANGE SEAT TO DISK END HEIGHT: 1.000 INCHES NOMINAL IN
•
FLANGE DIAMETER: 3.885 INCHES NOMINAL IN
•
THREAD LENGTH: 0.188 INCHES NOMINAL SINGLE THREADED PORTION IN
•
STYLE DESIGNATOR: THREADED FLANGED
•
BODY INSIDE DIAMETER: 0.500 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 4.000 INCHES SINGLE THREADED PORTION IN
•
TAPER LENGTH: 0.125 INCHES NOMINAL IN
•
SEAT RADIUS: 45.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT1.000 INCHES NOMINAL IN
FLANGE DIAMETER3.885 INCHES NOMINAL IN
THREAD LENGTH0.188 INCHES NOMINAL SINGLE THREADED PORTION IN
STYLE DESIGNATORTHREADED FLANGED
BODY INSIDE DIAMETER0.500 INCHES NOMINAL IN
NOMINAL THREAD SIZE4.000 INCHES SINGLE THREADED PORTION IN
TAPER LENGTH0.125 INCHES NOMINAL IN
SEAT RADIUS45.750 INCHES NOMINAL IN
UNDER FLANGE HEIGHT0.750 INCHES NOMINAL IN
THREAD CLASS2A SINGLE THREADED PORTION A
SUBSTITUTES & CROSS-REFERENCES 1
A-16733-2Reference 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 499505760023940?
499505760023940 is a SEAT,VALVE.
What parts can replace 499505760023940?
There is 1 known substitute for 499505760023940: A-16733-2. Substitute compatibility should be verified for your specific system.
What is the NSN for 499505760023940?
499505760023940 is cataloged in the U.S. Government catalog under NSN 4820-01-145-0987. 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.