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8343NT ITEM 8 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

8343NT ITEM 8: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_length: 0.656 INCHES NOMINAL SINGLE THREADED PORTION IN, overall_height: 0.970 INCHES NOMINAL IN, style_designator: PLAIN THREADED, seat_angle_in_deg: 45.000 NOMINAL, body_inside_diameter: 7.995 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-247-7811, 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
8343NT ITEM 8
NSN: 4820-01-247-7811
FSC: 4820 — Valves, Nonpowered
CAGE: 79342 — WILLIAM E WILLIAMS VALVE CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_length0.656 INCHES NOMINAL SINGLE THREADED PORTION IN
overall_height0.970 INCHES NOMINAL IN
style_designatorPLAIN THREADED
seat_angle_in_deg45.000 NOMINAL
body_inside_diameter7.995 INCHES NOMINAL IN
seating_surface_shapeANGULAR
NSN4820-01-247-7811
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 8343NT ITEM 8 · 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
•
THREAD LENGTH: 0.656 INCHES NOMINAL SINGLE THREADED PORTION IN
•
STYLE DESIGNATOR: PLAIN THREADED
•
BODY INSIDE DIAMETER: 7.995 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
SEAT ANGLE IN DEG: 45.000 NOMINAL
•
SEATING SURFACE SHAPE: ANGULAR
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.970 INCHES NOMINAL IN
THREAD LENGTH0.656 INCHES NOMINAL SINGLE THREADED PORTION IN
STYLE DESIGNATORPLAIN THREADED
BODY INSIDE DIAMETER7.995 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SEAT ANGLE IN DEG45.000 NOMINAL
SEATING SURFACE SHAPEANGULAR
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 1
8343NT-8Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 8343NT ITEM 8?
8343NT ITEM 8 is a SEAT,VALVE.
What parts can replace 8343NT ITEM 8?
There is 1 known substitute for 8343NT ITEM 8: 8343NT-8. Substitute compatibility should be verified for your specific system.
What is the NSN for 8343NT ITEM 8?
8343NT ITEM 8 is cataloged in the U.S. Government catalog under NSN 4820-01-247-7811. 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.