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174982L1 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

174982L1: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON OVERALL, flange_diameter: 0.436 INCHES NOMINAL IN, style_designator: PLAIN FLANGED, under_flange_height: 0.218 INCHES NOMINAL IN, body_inside_diameter: 0.180 INCHES NOMINAL IN, body_outside_diameter: 0.319 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-071-4804, 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
174982L1
NSN: 4820-00-071-4804
FSC: 4820 — Valves, Nonpowered
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON OVERALL
flange_diameter0.436 INCHES NOMINAL IN
style_designatorPLAIN FLANGED
under_flange_height0.218 INCHES NOMINAL IN
body_inside_diameter0.180 INCHES NOMINAL IN
body_outside_diameter0.319 INCHES NOMINAL IN
seating_surface_shapeFLAT
flange_seat_to_disk_end_height0.070 INCHES NOMINAL IN
NSN4820-00-071-4804
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 174982L1 · 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: 0.070 INCHES NOMINAL IN
•
FLANGE DIAMETER: 0.436 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 0.319 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN FLANGED
•
BODY INSIDE DIAMETER: 0.180 INCHES NOMINAL IN
•
UNDER FLANGE HEIGHT: 0.218 INCHES NOMINAL IN
•
MATERIAL: PLASTIC POLYAMIDE NYLON OVERALL
•
SEATING SURFACE SHAPE: FLAT
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.070 INCHES NOMINAL IN
FLANGE DIAMETER0.436 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER0.319 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN FLANGED
BODY INSIDE DIAMETER0.180 INCHES NOMINAL IN
UNDER FLANGE HEIGHT0.218 INCHES NOMINAL IN
MATERIALPLASTIC POLYAMIDE NYLON OVERALL
SEATING SURFACE SHAPEFLAT
SUBSTITUTES & CROSS-REFERENCES 2
174982-0087Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
4820PL1365221Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 174982L1?
174982L1 is a SEAT,VALVE.
What parts can replace 174982L1?
There are 2 known substitutes for 174982L1: 174982-0087, 4820PL1365221. Substitute compatibility should be verified for your specific system.
What is the NSN for 174982L1?
174982L1 is cataloged in the U.S. Government catalog under NSN 4820-00-071-4804. 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.