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Technical Data Sheet
PartsTable / COMPONENT / 4SS845-1889568ASSYCPC4 1/2IN
4SS845-1889568ASSYCPC4 1/2IN ✓ 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 4SS845-1889568ASSYCPC4 1/2IN is a the manufacturer memory module engineered for enterprise server and workstation platforms requiring validated, high-reliability memory. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-075-6588, 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
4SS845-1889568ASSYCPC4 1/2IN
NSN: 4820-01-075-6588
FSC: 4820
CAGE: 67636 — LITHO DEVELOPMENT AND RESEARCH (USA)
SPECIFICATIONS
Part Number4SS845-1889568ASSYCPC4 1/2IN
NSN4820-01-075-6588
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 4SS845-1889568ASSYCPC4 1/2IN · 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: NICKEL ALLOY OVERALL
•
STYLE DESIGNATOR: THREADED FLANGED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
THREAD SERIES DESIGNATOR: UNS SINGLE THREADED PORTION
•
FLANGE SEAT TO DISK END HEIGHT: 0.247 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 18 SINGLE THREADED PORTION
•
THREAD CLASS: 3A SINGLE THREADED PORTION A
•
SEAT ANGLE IN DEG: 45.000 NOMINAL
TYPICAL APPLICATIONS
  • Server memory expansion for virtualization workloads
  • Database performance optimization (in-memory computing)
  • VDI and remote desktop session hosting
  • High-performance computing (HPC) clusters
  • Mail server and collaboration platform scaling
  • Application server tier expansion
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALNICKEL ALLOY OVERALL
STYLE DESIGNATORTHREADED FLANGED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD SERIES DESIGNATORUNS SINGLE THREADED PORTION
FLANGE SEAT TO DISK END HEIGHT0.247 INCHES NOMINAL IN
THREAD QUANTITY PER INCH18 SINGLE THREADED PORTION
THREAD CLASS3A SINGLE THREADED PORTION A
SEAT ANGLE IN DEG45.000 NOMINAL
SEATING SURFACE SHAPEANGULAR
FLANGE DIAMETER2.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 34
C38476Interchangeable
interchangeable cross-reference
interchangeable
SS845-1889587Interchangeable
interchangeable cross-reference
interchangeable
SC3549 3-4INInterchangeable
interchangeable cross-reference
interchangeable
2620-902 ASSY CInterchangeable
interchangeable cross-reference
interchangeable
845-1889587ASSYCFInterchangeable
interchangeable cross-reference
interchangeable
2620-902Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4SS845-1889568ASSYCPC4 1/2IN?
4SS845-1889568ASSYCPC4 1/2IN is a 4SS845-1889568ASSYCPC4 1/2IN.
What parts can replace 4SS845-1889568ASSYCPC4 1/2IN?
There are 34 known substitutes for 4SS845-1889568ASSYCPC4 1/2IN: C38476, SS845-1889587, SC3549 3-4IN and 31 more. Substitute compatibility should be verified for your specific system.
Is 4SS845-1889568ASSYCPC4 1/2IN still available?
4SS845-1889568ASSYCPC4 1/2IN 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