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19S91 — Technical Data Sheet

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— · 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: 3.500 INCHES IN, ring_set_component_parts: COMPRESSION RING,200CM,77220,4; COMPRESSION RING,70CM,77220,8; OIL RING,WS85,77220,4 CM. This part is cataloged in the Federal Logistics Information System under NSN 2805-00-516-9365, 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
19S91
NSN: 2805-00-516-9365
FSC: 2805
CAGE: 80756 — SPIROLOX INC (USA)
SPECIFICATIONS
standard_bore_diameter3.500 INCHES IN
ring_set_component_partsCOMPRESSION RING,200CM,77220,4; COMPRESSION RING,70CM,77220,8; OIL RING,WS85,77220,4 CM
piston_accommodation_quantity4
NSN2805-00-516-9365
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RING SET,PISTON TITLE COMPONENT PN 19S91 MFR RING SET,PISTON
KEY FEATURES
•
STANDARD BORE DIAMETER: 3.500 INCHES IN
•
PISTON ACCOMMODATION QUANTITY: 4
•
RING SET COMPONENT PARTS: COMPRESSION RING,200CM,77220,4; COMPRESSION RING,70CM,77220,8; OIL RING,WS85,77220,4 CM
TECHNICAL CHARACTERISTICS
STANDARD BORE DIAMETER3.500 INCHES IN
PISTON ACCOMMODATION QUANTITY4
RING SET COMPONENT PARTSCOMPRESSION RING,200CM,77220,4; COMPRESSION RING,70CM,77220,8; OIL RING,WS85,77220,4 CM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
6440151InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
7272InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
429InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
24182InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
31328InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
7351140InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 19S91?
19S91 is a RING SET,PISTON.
What parts can replace 19S91?
There are 17 known substitutes for 19S91: 6440151, 7272, 429 and 14 more. Substitute compatibility should be verified for your specific system.
Is 19S91 still available?
19S91 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026