PartsTable
Technical Data Sheet
4SS845-1889568 ✓ 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 LOCKNUT,TUBE FITTING is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY OVERALL, thread_class: 3A SINGLE THREADED PORTION A, thread_length: 0.406 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 2.125 INCHES NOMINAL IN, style_designator: THREADED FLANGED, seat_angle_in_deg: 45.000 NOMINAL. 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
4SS845-1889568
NSN: 4820-01-075-6588
FSC: 4820
CAGE: 67636 — LITHO DEVELOPMENT AND RESEARCH (USA)
SPECIFICATIONS
materialNICKEL ALLOY OVERALL
thread_class3A SINGLE THREADED PORTION A
thread_length0.406 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter2.125 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
seat_angle_in_deg45.000 NOMINAL
nominal_thread_size1.938 INCHES SINGLE THREADED PORTION IN
under_flange_height0.406 INCHES NOMINAL IN
body_inside_diameter1.500 INCHES NOMINAL IN
seating_surface_shapeANGULAR
thread_quantity_per_inch18 SINGLE THREADED PORTION
thread_series_designatorUNS SINGLE THREADED PORTION
NSN4820-01-075-6588
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 4SS845-1889568 · 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
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 35
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 4SS845-1889568?
4SS845-1889568 is a LOCKNUT,TUBE FITTING.
What parts can replace 4SS845-1889568?
There are 35 known substitutes for 4SS845-1889568: C38476, SS845-1889587, SC3549 3-4IN and 32 more. Substitute compatibility should be verified for your specific system.
Is 4SS845-1889568 still available?
4SS845-1889568 is currently cancelled.
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