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28877N ITEM 20 — Technical Data Sheet

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— · 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 SEAT,VALVE is a the manufacturer industrial component. Key specifications include criticality_code_justification: ZZZY. This part is cataloged in the Federal Logistics Information System under NSN 4820-01-215-1564, 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
28877N ITEM 20
NSN: 4820-01-215-1564
FSC: 4820
CAGE: 35795 — LESLIE CONTROLS, INC. DBA LESLIE CONTROLS INC (USA)
SPECIFICATIONS
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsSELECTED,TESTED AND CERTIFIED FOR TRIDENT SUBMARINE APPLICATION; MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
NSN4820-01-215-1564
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 28877N ITEM 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
N67370InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
28877N ITEM 3InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
67370InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
28877NInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
N67384InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
67384InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28877N ITEM 20?
28877N ITEM 20 is a SEAT,VALVE.
What parts can replace 28877N ITEM 20?
There are 26 known substitutes for 28877N ITEM 20: N67370, 28877N ITEM 3, 67370 and 23 more. Substitute compatibility should be verified for your specific system.
Is 28877N ITEM 20 still available?
28877N ITEM 20 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026