PartsTable
Technical Data Sheet
633797-4 ✓ 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 FILTER ELEMENT,FLUID is a the manufacturer industrial component. Key specifications include flow_style: TWO WAY TWO PORT 90 DEGREE PLUG TURN, seat_angle: 37.0 DEGREES FIRST END, thread_class: 3A FIRST END A, connection_type: THREADED EXTERNAL TUBE FIRST END, connection_style: FLARED (TUBE) FIRST END, thread_direction: RIGHT-HAND FIRST END. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-546-7350, 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
633797-4
NSN: 4820-00-546-7350
FSC: 4820
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
flow_styleTWO WAY TWO PORT 90 DEGREE PLUG TURN
seat_angle37.0 DEGREES FIRST END
thread_class3A FIRST END A
connection_typeTHREADED EXTERNAL TUBE FIRST END
connection_styleFLARED (TUBE) FIRST END
thread_directionRIGHT-HAND FIRST END
nominal_thread_size0.437 INCHES FIRST END IN
maximum_operating_temp160.0 FAHRENHEIT SINGLE RESPONSE DEGF
thread_quantity_per_inch20 FIRST END
thread_series_designatorUNF FIRST END
nominal_outside_diameter_tube_accommodated0.250 INCHES FIRST END IN
NSN4820-00-546-7350
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 633797-4 · 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
SEAT ANGLE: 37.0 DEGREES FIRST END
THREAD SERIES DESIGNATOR: UNF FIRST END
CONNECTION STYLE: FLARED (TUBE) FIRST END
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END
THREAD QUANTITY PER INCH: 20 FIRST END
THREAD CLASS: 3A FIRST END A
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES FIRST END IN
MAXIMUM OPERATING TEMP: 160.0 FAHRENHEIT SINGLE RESPONSE DEGF
TECHNICAL CHARACTERISTICS (FLIS)
SEAT ANGLE37.0 DEGREES FIRST END
THREAD SERIES DESIGNATORUNF FIRST END
CONNECTION STYLEFLARED (TUBE) FIRST END
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
THREAD QUANTITY PER INCH20 FIRST END
THREAD CLASS3A FIRST END A
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
MAXIMUM OPERATING TEMP160.0 FAHRENHEIT SINGLE RESPONSE DEGF
FLOW STYLETWO WAY TWO PORT 90 DEGREE PLUG TURN
THREAD DIRECTIONRIGHT-HAND FIRST END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
3377-1Interchangeable
interchangeable cross-reference
interchangeable
MILS26877Interchangeable
interchangeable cross-reference
interchangeable
5133PL0881859Interchangeable
interchangeable cross-reference
interchangeable
2330Interchangeable
interchangeable cross-reference
interchangeable
R25TInterchangeable
interchangeable cross-reference
interchangeable
04-21990Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 633797-4?
633797-4 is a FILTER ELEMENT,FLUID.
What parts can replace 633797-4?
There are 6 known substitutes for 633797-4: 3377-1, MILS26877, 5133PL0881859 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 633797-4?
633797-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-546-7350. This indicates validated use in U.S. government and defense supply chains.
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