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51740B637 — STEM,FLUID VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

51740B637: STEM,FLUID VALVE.

The STEM,FLUID VALVE is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY, stem_actuating_end_type: THREADED EXTERNALLY, valve_type_for_which_designed: BUTTERFLY. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-355-3378, 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
51740B637
NSN: 4820-01-355-3378
FSC: 4820 — Valves, Nonpowered
CAGE: 1NB39 — DOVER RESOURCES, INC. DIV NORRISEAL (USA)
SPECIFICATIONS
materialNICKEL ALLOY
stem_actuating_end_typeTHREADED EXTERNALLY
valve_type_for_which_designedBUTTERFLY
NSN4820-01-355-3378
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 51740B637 · 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
•
VALVE TYPE FOR WHICH DESIGNED: BUTTERFLY
•
STEM ACTUATING END TYPE: THREADED EXTERNALLY
•
MATERIAL: NICKEL ALLOY
TECHNICAL CHARACTERISTICS
VALVE TYPE FOR WHICH DESIGNEDBUTTERFLY
STEM ACTUATING END TYPETHREADED EXTERNALLY
MATERIALNICKEL ALLOY
SUBSTITUTES & CROSS-REFERENCES 2
920-220REF 3Reference document
Same NSN cross-reference
Reference document — Secondary reference
920-220Reference 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 51740B637?
51740B637 is a STEM,FLUID VALVE.
What parts can replace 51740B637?
There are 2 known substitutes for 51740B637: 920-220REF 3, 920-220. Substitute compatibility should be verified for your specific system.
What is the NSN for 51740B637?
51740B637 is cataloged in the U.S. Government catalog under NSN 4820-01-355-3378. 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.