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Technical Data Sheet
PartsTable / COMPONENT / 8170437
8170437 ✓ 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 RETAINER,SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING, overall_length: 0.488 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN, nominal_thread_size: 0.438 INCHES IN, valve_design_control_activity: 26505. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-561-7760, 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
8170437
NSN: 4820-00-561-7760
FSC: 4820
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING
overall_length0.488 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN
nominal_thread_size0.438 INCHES IN
valve_design_control_activity26505
NSN4820-00-561-7760
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 8170437 · 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
•
MATERIAL: STEEL CORROSION RESISTING
•
VALVE DESIGN CONTROL ACTIVITY: 26505
•
NOMINAL THREAD SIZE: 0.438 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH0.488 INCHES MINIMUM AND 0.508 INCHES MAXIMUM IN
MATERIALSTEEL CORROSION RESISTING
VALVE DESIGN CONTROL ACTIVITY26505
NOMINAL THREAD SIZE0.438 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
22478Interchangeable
interchangeable cross-reference
interchangeable
2-478Interchangeable
interchangeable cross-reference
interchangeable
P425GASKETInterchangeable
interchangeable cross-reference
interchangeable
D15-439EPC160-161-176-177Interchangeable
interchangeable cross-reference
interchangeable
91700919Interchangeable
interchangeable cross-reference
interchangeable
543BPC17Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8170437?
8170437 is a RETAINER,SEAT,VALVE.
What parts can replace 8170437?
There are 15 known substitutes for 8170437: 22478, 2-478, P425GASKET and 12 more. Substitute compatibility should be verified for your specific system.
Is 8170437 still available?
8170437 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: July 2026