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RS520 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The RING SET,PISTON is a the manufacturer industrial component. Key specifications include standard_bore_diameter: 3.000 INCHES IN, ring_set_component_parts: COMPRESSION RING,MUSKEGON PISTON RING CO,2 AND OIL RING,MUSKEGON PISTON RING CO,2. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2805-00-358-3391, 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
RS520
NSN: 2805-00-358-3391
FSC: 2805
CAGE: 76255 — MCQUAY-NORRIS INC OEM DIV AN SKF INDUSTRIES CO
SPECIFICATIONS
standard_bore_diameter3.000 INCHES IN
ring_set_component_partsCOMPRESSION RING,MUSKEGON PISTON RING CO,2 AND OIL RING,MUSKEGON PISTON RING CO,2
piston_accommodation_quantity6
NSN2805-00-358-3391
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING SET,PISTON TITLE COMPONENT PN RS520 MFR RING SET,PISTON
KEY FEATURES
•
PISTON ACCOMMODATION QUANTITY: 6
•
STANDARD BORE DIAMETER: 3.000 INCHES IN
•
RING SET COMPONENT PARTS: COMPRESSION RING,MUSKEGON PISTON RING CO,2 AND OIL RING,MUSKEGON PISTON RING CO,2
TECHNICAL CHARACTERISTICS (FLIS)
PISTON ACCOMMODATION QUANTITY6
STANDARD BORE DIAMETER3.000 INCHES IN
RING SET COMPONENT PARTSCOMPRESSION RING,MUSKEGON PISTON RING CO,2 AND OIL RING,MUSKEGON PISTON RING CO,2
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
4583Interchangeable
interchangeable cross-reference
interchangeable
ASME B94.19Interchangeable
interchangeable cross-reference
interchangeable
B94.19 TABLE 45Interchangeable
interchangeable cross-reference
interchangeable
642768Interchangeable
interchangeable cross-reference
interchangeable
7374978Interchangeable
interchangeable cross-reference
interchangeable
M7148-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RS520?
RS520 is a RING SET,PISTON.
What parts can replace RS520?
There are 11 known substitutes for RS520: 4583, ASME B94.19, B94.19 TABLE 45 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for RS520?
RS520 is cataloged in the Federal Logistics Information System (FLIS) under NSN 2805-00-358-3391. 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