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6983491-021 — VALVE,BALL

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

6983491-021: VALVE,BALL.

The VALVE,BALL is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY STEM, valve_size: 0.750 INCHES IN, flange_shape: ROUND WITH HOLES ALL ENDS, connection_type: FLANGE ALL ENDS, special_features: NON-ASBESTOS, style_designator: STRAIGHT THRU FLANGED ENDS. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-458-0405, 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
6983491-021
NSN: 4820-01-458-0405
FSC: 4820 — Valves, Nonpowered
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialNICKEL ALLOY STEM
valve_size0.750 INCHES IN
flange_shapeROUND WITH HOLES ALL ENDS
connection_typeFLANGE ALL ENDS
special_featuresNON-ASBESTOS
style_designatorSTRAIGHT THRU FLANGED ENDS
nominal_thickness1.880 INCHES ALL ENDS IN
bolt_hole_quantity4 ALL ENDS
flange_face_designPLAIN ALL ENDS
face_to_face_distance1.880 INCHES IN
valve_operation_methodMANUAL
end_item_identificationNIMITZ CLASS CVN
NSN4820-01-458-0405
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 6983491-021 · 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 SHAPE: ROUND WITH HOLES ALL ENDS
•
FURNISHED ITEMS AND QUANTITY: 1 HANDLE
•
FLANGE FACE DESIGN: PLAIN ALL ENDS
•
BOLT CIRCLE NOMINAL DIAMETER: 2.750 INCHES ALL ENDS IN
•
CONNECTION TYPE: FLANGE ALL ENDS
•
STYLE DESIGNATOR: STRAIGHT THRU FLANGED ENDS
•
BOLT HOLE NOMINAL DIAMETER: 0.560 INCHES ALL ENDS IN
•
VALVE SIZE: 0.750 INCHES IN
TECHNICAL CHARACTERISTICS
FLANGE SHAPEROUND WITH HOLES ALL ENDS
FURNISHED ITEMS AND QUANTITY1 HANDLE
FLANGE FACE DESIGNPLAIN ALL ENDS
BOLT CIRCLE NOMINAL DIAMETER2.750 INCHES ALL ENDS IN
CONNECTION TYPEFLANGE ALL ENDS
STYLE DESIGNATORSTRAIGHT THRU FLANGED ENDS
BOLT HOLE NOMINAL DIAMETER0.560 INCHES ALL ENDS IN
VALVE SIZE0.750 INCHES IN
NOMINAL OUTSIDE DIAMETER3.880 INCHES ALL ENDS IN
BOLT HOLE QUANTITY4 ALL ENDS
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 2
6983491-021 NONReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
6983491Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6983491-021?
6983491-021 is a VALVE,BALL.
What parts can replace 6983491-021?
There are 2 known substitutes for 6983491-021: 6983491-021 NON, 6983491. Substitute compatibility should be verified for your specific system.
What is the NSN for 6983491-021?
6983491-021 is cataloged in the U.S. Government catalog under NSN 4820-01-458-0405. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.