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51729B002 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

51729B002: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include special_features: ENVELOPE MATERIAL: GLASS; MFG CLASS: ELECTRON TUBE, CATHODE. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-123-2149, 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
51729B002
NSN: 4820-01-123-2149
FSC: 4820 — Valves, Nonpowered
CAGE: 1NB39 — DOVER RESOURCES, INC. DIV NORRISEAL (USA)
SPECIFICATIONS
special_featuresENVELOPE MATERIAL: GLASS; MFG CLASS: ELECTRON TUBE, CATHODE
NSN4820-01-123-2149
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 51729B002 · 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
SUBSTITUTES & CROSS-REFERENCES 4
911-471 REF 5 2 1-2INReference document
Same NSN cross-reference
Reference document — Secondary reference
729B002Reference document
Same NSN cross-reference
Reference document — Secondary reference
911-470 REF 5 2 1-2INSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
911-471Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
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 51729B002?
51729B002 is a SEAT,VALVE.
What parts can replace 51729B002?
There are 4 known substitutes for 51729B002: 911-471 REF 5 2 1-2IN, 729B002, 911-470 REF 5 2 1-2IN and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 51729B002?
51729B002 is cataloged in the U.S. Government catalog under NSN 4820-01-123-2149. 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.