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SK520-3 — BALL,VALVE,PORTED

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

SK520-3: BALL,VALVE,PORTED.

The BALL,VALVE,PORTED is a the manufacturer industrial component. Key specifications include material: ALUMINUM, port_diameter: 1.063 INCHES NOMINAL IN, special_features: STUFFING BALL ASSEMBLY,3 1/2 DIA STUFFING BALL, port_configuration: STRAIGHT, spherical_diameter: 3.5 INCHES NOMINAL IN, end_item_identification: 4820013497226. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-612-6129, 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
SK520-3
NSN: 4820-01-612-6129
FSC: 4820 — Valves, Nonpowered
CAGE: 54752 — R G ROLLIN CO (USA)
SPECIFICATIONS
materialALUMINUM
port_diameter1.063 INCHES NOMINAL IN
port_quantity2
special_featuresSTUFFING BALL ASSEMBLY,3 1/2 DIA STUFFING BALL
port_configurationSTRAIGHT
spherical_diameter3.5 INCHES NOMINAL IN
end_item_identification4820013497226
stem_accommodation_quantity1
part_name_assigned_by_controlling_agencySTUFFING BALL ASSY
NSN4820-01-612-6129
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: SK520-3 · 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
•
PORT DIAMETER: 1.063 INCHES NOMINAL IN
•
SPHERICAL DIAMETER: 3.5 INCHES NOMINAL IN
•
PORT CONFIGURATION: STRAIGHT
•
STEM ACCOMMODATION QUANTITY: 1
•
PORT QUANTITY: 2
TECHNICAL CHARACTERISTICS
PORT DIAMETER1.063 INCHES NOMINAL IN
SPHERICAL DIAMETER3.5 INCHES NOMINAL IN
PORT CONFIGURATIONSTRAIGHT
STEM ACCOMMODATION QUANTITY1
PORT QUANTITY2
SPECIAL FEATURESSTUFFING BALL ASSEMBLY,3 1/2 DIA STUFFING BALL
PART NAME ASSIGNED BY CONTROLLING AGENCYSTUFFING BALL ASSY
END ITEM IDENTIFICATION4820013497226
MATERIALALUMINUM
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

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is SK520-3?
SK520-3 is a BALL,VALVE,PORTED.
What is the NSN for SK520-3?
SK520-3 is cataloged in the U.S. Government catalog under NSN 4820-01-612-6129. 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.