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PartsTable / COMPONENT / 21877N PIECE 20
21877N PIECE 20 ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The CYLINDER BOTTOM,VALVE is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: CARBON STEEL;9.015 IN.LG;0.375 IN.THK IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-264-5659, 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
21877N PIECE 20
NSN: 4820-01-264-5659
FSC: 4820
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
general_characteristics_item_descriptionCARBON STEEL;9.015 IN.LG;0.375 IN.THK IN
NSN4820-01-264-5659
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 21877N PIECE 20 · 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
•
GENERAL CHARACTERISTICS ITEM DESCRIPTION: CARBON STEEL;9.015 IN.LG;0.375 IN.THK IN
TECHNICAL CHARACTERISTICS (FLIS)
GENERAL CHARACTERISTICS ITEM DESCRIPTIONCARBON STEEL;9.015 IN.LG;0.375 IN.THK IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
21647Interchangeable
interchangeable cross-reference
interchangeable
22563Interchangeable
interchangeable cross-reference
interchangeable
DSC3B-2Interchangeable
interchangeable cross-reference
interchangeable
216407Interchangeable
interchangeable cross-reference
interchangeable
D2164-7Interchangeable
interchangeable cross-reference
interchangeable
M1663AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21877N PIECE 20?
21877N PIECE 20 is a CYLINDER BOTTOM,VALVE.
What parts can replace 21877N PIECE 20?
There are 7 known substitutes for 21877N PIECE 20: 21647, 22563, DSC3B-2 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 21877N PIECE 20?
21877N PIECE 20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-264-5659. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026