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3W21936 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

3W21936: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, flange_diameter: 1.938 INCHES NOMINAL IN, special_features: EIGHT 0.188 IN HOLES IN SEAT FACE IN, style_designator: PLAIN FLANGED, under_flange_height: 0.312 INCHES NOMINAL IN, body_inside_diameter: 0.625 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 4810-00-471-0059, 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
3W21936
NSN: 4810-00-471-0059
FSC: 4810 — Valves, Powered
CAGE: 8FGX3 — CURTISS-WRIGHT ELECTRO-MECHANICAL CORP DBA STEAM & AIR SOLUTIONS DIV CURTISS-WRIGHT STEAM AND AIR SOLUTIONS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
flange_diameter1.938 INCHES NOMINAL IN
special_featuresEIGHT 0.188 IN HOLES IN SEAT FACE IN
style_designatorPLAIN FLANGED
under_flange_height0.312 INCHES NOMINAL IN
body_inside_diameter0.625 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN
body_outside_diameter1.500 INCHES NOMINAL IN
seating_surface_shapeFLAT
NSN4810-00-471-0059
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 3W21936 · 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 DIAMETER: 1.938 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 1.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN FLANGED
•
BODY INSIDE DIAMETER: 0.625 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN
•
UNDER FLANGE HEIGHT: 0.312 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
SEATING SURFACE SHAPE: FLAT
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER1.938 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER1.500 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN FLANGED
BODY INSIDE DIAMETER0.625 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN
SPECIAL FEATURESEIGHT 0.188 IN HOLES IN SEAT FACE IN
UNDER FLANGE HEIGHT0.312 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SEATING SURFACE SHAPEFLAT
OTHER ITEMS IN FSC 4810 — Valves, Powered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4810-00-001-1247 4810-00-001-4499 4810-00-001-4531 4810-00-001-4532 4810-00-001-4554 4810-00-001-4555 4810-00-001-4556 4810-00-001-4611
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 3W21936?
3W21936 is a SEAT,VALVE.
What is the NSN for 3W21936?
3W21936 is cataloged in the U.S. Government catalog under NSN 4810-00-471-0059. 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.