Skip to content
Please enter a keyword to search

  • ISO 6621-4:2015

    Current The latest, up-to-date edition.

    Internal combustion engines Piston rings Part 4: General specifications

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English

    Published date:  18-03-2015

    Publisher:  International Organization for Standardization

    Add To Cart

    Abstract - (Show below) - (Hide below)

    ISO 6621-4:2015 specifies the general characteristics of piston rings for reciprocating internal combustion engines for road vehicles and other applications (the individual dimensional criteria for these rings are given in the relevant International Standards). It also provides a system for ring coding, designation, and marking. It is applicable to all such rings of a nominal diameter from 30 mm up to and including 200 mm.

    General Product Information - (Show below) - (Hide below)

    Development Note Supersedes ISO/DIS 6621-4. (03/2015)
    Document Type Standard
    Publisher International Organization for Standardization
    Status Current
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS ISO 6626-3:2008 Internal combustion engines. Piston rings Coil-spring-loaded oil control rings made of steel
    DIN V 76624:1990-06 INTERNAL COMBUSTION ENGINES - PISTON RINGS - HALF KEYSTONE RINGS
    12/30232970 DC : 0 BS ISO 6623 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - SCRAPER RINGS MADE OF CAST IRON
    BS ISO 6624-2:2016 Internal combustion engines. Piston rings Half keystone rings made of cast iron
    BS ISO 6621-5:2013 Internal combustion engines. Piston rings Quality requirements
    DIN ISO 6622-1:1990-06 INTERNAL COMBUSTION ENGINES; PISTON RINGS; RECTANGULAR RINGS
    BS DD212(1992) : 1992 PISTON RINGS UP TO 200mm DIAMETER FOR RECIPROCATING INTERNAL COMBUSTION ENGINES: SPECIFICATION FOR EXPANDER/SEGMENT OIL CONTROL RINGS
    ISO 6624-2:2016 Internal combustion engines — Piston rings — Part 2: Half keystone rings made of cast iron
    ISO 6627:2011 Internal combustion engines Piston rings Expander/segment oil-control rings
    12/30242897 DC : 0 BS ISO 6624-2 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 2: HALF KEYSTONE RINGS MADE OF CAST IRON
    04/19980487 DC : DRAFT AUG 2004 BS ISO 6621-5 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 5: QUALITY REQUIREMENTS
    BS ISO 6624-4:2016 Internal combustion engines. Piston rings Half keystone rings made of steel
    16/30340311 DC : DRAFT JUNE 2016 BS ISO 6626-2 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 2: COIL-SPRING-LOADED OIL CONTROL RINGS OF NARROW WIDTH MADE OF CAST IRON
    15/30320008 DC : 0 BS ISO 6626-3 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 3: COIL-SPRING-LOADED OIL CONTROL RINGS MADE OF STEEL
    DIN V 76622:1990-06 INTERNAL COMBUSTION ENGINES - PISTON RINGS - RECTANGULAR RINGS WITH NARROW RING WIDTH
    SAE J 2275 : 2010 (R2018) INTERNAL COMBUSTION ENGINES - PISTON RING-GROOVES
    ISO 6625:1986 Internal combustion engines Piston rings Oil control rings
    ISO 6626:1989 Internal combustion engines Piston rings Coil-spring-loaded oil control rings
    ISO/TR 6627:1992 Internal combustion engines Piston rings Expander/segment oil control rings
    98/716688 DC : DRAFT NOV 1998 ISO/DIS 6624-1 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 1: KEYSTONE RINGS MADE OF CAST IRON
    BS ISO 6622-2:2013 Internal combustion engines. Piston rings Rectangular rings made of steel
    BS ISO 6622-1:2003 Internal combustion engines. Piston rings Rectangular rings made of cast iron
    11/30211186 DC : 0 BS ISO 6621-5 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 5: QUALITY REQUIREMENTS
    16/30340802 DC : 0 BS ISO 6626-1 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 1: COIL-SPRING-LOADED OIL CONTROL RINGS MADE OF CAST IRON
    15/30320002 DC : 0 BS ISO 6624-1 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 1: KEYSTONE RINGS MADE OF CAST IRON
    ISO 6624-3:2017 Internal combustion engines — Piston rings — Part 3: Keystone rings made of steel
    BS ISO 6624-3:2017 Internal combustion engines. Piston rings Keystone rings made of steel
    ISO 6621-1:2018 Internal combustion engines — Piston rings — Part 1: Vocabulary
    11/30211189 DC : 0 BS ISO 6622-2 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 2: RECTANGULAR RINGS MADE OF STEEL
    ISO 6623:2013 Internal combustion engines Piston rings Scraper rings made of cast iron
    ISO 6626-2:2013 Internal combustion engines Piston rings Part 2: Coil-spring-loaded oil control rings of narrow width made of cast iron
    ISO/TR 6624-2:1988 Internal combustion engines — Piston rings — Part 2: Half keystone rings
    12/30242900 DC : 0 BS ISO 6624-4 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 4: HALF KEYSTONE RINGS MADE OF STEEL
    BS ISO 6626-2:2013 Internal combustion engines. Piston rings Coil-spring-loaded oil control rings of narrow width made of cast iron
    15/30320005 DC : 0 BS ISO 6624-3 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 3: KEYSTONE RINGS MADE OF STEEL
    BS ISO 6627:2011 Internal combustion engines. Piston rings. Expander/segment oil-control rings
    BS ISO 6623:2013 Internal combustion engines. Piston rings. Scraper rings made of cast iron
    BS ISO 6624-1:2017 Internal combustion engines. Piston rings Keystone rings made of cast iron
    ISO 6622-2:2013 Internal combustion engines — Piston rings — Part 2: Rectangular rings made of steel
    ISO 6626-3:2008 Internal combustion engines Piston rings Part 3: Coil-spring-loaded oil control rings made of steel
    ISO 6624-4:2016 Internal combustion engines — Piston rings — Part 4: Half keystone rings made of steel
    ISO 6621-5:2013 Internal combustion engines Piston rings Part 5: Quality requirements
    12/30211192 DC : 0 BS ISO 6626-2 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 2: COIL-SPRING-LOADED OIL CONTROL RINGS OF NARROW WIDTH MADE OF CAST IRON
    07/30163269 DC : 0 BS ISO 6626-3 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - PART 3: COIL-SPRING-LOADED AND NITRIDED OIL CONTROL RINGS MADE OF STEEL
    08/30179075 DC : DRAFT SEP 2008 BS ISO 6627 - INTERNAL COMBUSTION ENGINES - PISTON RINGS - EXPANDER/SEGMENT OIL-CONTROL RINGS
    ISO/TR 6622-2:1988 Internal combustion engines Piston rings Part 2: Rectangular rings with narrow ring width
    ISO 6622-1:2003 Internal combustion engines Piston rings Part 1: Rectangular rings made of cast iron
    ISO 6624-1:2017 Internal combustion engines — Piston rings — Part 1: Keystone rings made of cast iron

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO 6622-2:2013 Internal combustion engines — Piston rings — Part 2: Rectangular rings made of steel
    ISO 6621-2:2003 Internal combustion engines Piston rings Part 2: Inspection measuring principles
    ISO 6624-2:2016 Internal combustion engines — Piston rings — Part 2: Half keystone rings made of cast iron
    ISO 6624-3:2017 Internal combustion engines — Piston rings — Part 3: Keystone rings made of steel
    ISO 6626-2:2013 Internal combustion engines Piston rings Part 2: Coil-spring-loaded oil control rings of narrow width made of cast iron
    ISO 6624-1:2017 Internal combustion engines — Piston rings — Part 1: Keystone rings made of cast iron
    ISO 6624-4:2016 Internal combustion engines — Piston rings — Part 4: Half keystone rings made of steel
    ISO 6507-3:2005 Metallic materials Vickers hardness test Part 3: Calibration of reference blocks
    ISO 6625:1986 Internal combustion engines Piston rings Oil control rings
    ISO 6622-1:2003 Internal combustion engines Piston rings Part 1: Rectangular rings made of cast iron
    ISO 6623:2013 Internal combustion engines Piston rings Scraper rings made of cast iron
    ISO 6627:2011 Internal combustion engines Piston rings Expander/segment oil-control rings
    ISO 6621-1:2007 Internal combustion engines Piston rings Part 1: Vocabulary
    ISO 6626-3:2008 Internal combustion engines Piston rings Part 3: Coil-spring-loaded oil control rings made of steel
    View more information

    • Access your standards online with a subscription

      Features

      • Simple online access to standards, technical information and regulations
      • Critical updates of standards and customisable alerts and notifications
      • Multi - user online standards collection: secure, flexibile and cost effective