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Technical Data Sheet
PartsTable / COMPONENT / 6305390 ITEM 20
6305390 ITEM 20 ✓ 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 VALVE,BALL is a the manufacturer industrial component. Key specifications include material: GLASS FIBER BODY, valve_size: 6.000 INCHES IN, flange_shape: OVAL WITH HOLES ALL ENDS, nominal_width: 11.000 INCHES ALL ENDS IN, nominal_length: 11.000 INCHES ALL ENDS IN, connection_type: FLANGE ALL ENDS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-517-4831, 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
6305390 ITEM 20
NSN: 4820-01-517-4831
FSC: 4820
CAGE: 80091 — NAVAL FACILITIES ENGINEERING COMMAND (USA)
SPECIFICATIONS
materialGLASS FIBER BODY
valve_size6.000 INCHES IN
flange_shapeOVAL WITH HOLES ALL ENDS
nominal_width11.000 INCHES ALL ENDS IN
nominal_length11.000 INCHES ALL ENDS IN
connection_typeFLANGE ALL ENDS
style_designatorSTRAIGHT THRU FLANGED ENDS
nominal_thickness1.630 INCHES ALL ENDS IN
bolt_hole_quantity4 ALL ENDS
flange_face_designPLAIN ALL ENDS
operating_pressure150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
face_to_face_distance10.500 INCHES IN
NSN4820-01-517-4831
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 6305390 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
KEY FEATURES
•
FLANGE FACE DESIGN: PLAIN ALL ENDS
•
BOLT HOLE NOMINAL DIAMETER: 0.437 INCHES ALL ENDS IN
•
BOLT CIRCLE NOMINAL DIAMETER: 9.500 INCHES ALL ENDS IN
•
MATERIAL: GLASS FIBER BODY
•
STYLE DESIGNATOR: STRAIGHT THRU FLANGED ENDS
•
FACE TO FACE DISTANCE: 10.500 INCHES IN
•
FURNISHED ITEMS AND QUANTITY: 1 HANDLE
TECHNICAL CHARACTERISTICS (FLIS)
FLANGE FACE DESIGNPLAIN ALL ENDS
BOLT HOLE NOMINAL DIAMETER0.437 INCHES ALL ENDS IN
BOLT CIRCLE NOMINAL DIAMETER9.500 INCHES ALL ENDS IN
MATERIALGLASS FIBER BODY
PART NAME ASSIGNED BY CONTROLLING AGENCY6 INCH NIL-COR BALL VALVE IN
STYLE DESIGNATORSTRAIGHT THRU FLANGED ENDS
FACE TO FACE DISTANCE10.500 INCHES IN
FURNISHED ITEMS AND QUANTITY1 HANDLE
BOLT HOLE QUANTITY4 ALL ENDS
CONNECTION TYPEFLANGE ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
SS1520-17-18Interchangeable
interchangeable cross-reference
interchangeable
6305390Interchangeable
interchangeable cross-reference
interchangeable
29-12Interchangeable
interchangeable cross-reference
interchangeable
6305390-40Interchangeable
interchangeable cross-reference
interchangeable
4-310 ST-T-SInterchangeable
interchangeable cross-reference
interchangeable
6305390-21Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6305390 ITEM 20?
6305390 ITEM 20 is a VALVE,BALL.
What parts can replace 6305390 ITEM 20?
There are 10 known substitutes for 6305390 ITEM 20: SS1520-17-18, 6305390, 29-12 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 6305390 ITEM 20?
6305390 ITEM 20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-517-4831. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026