174 WARNING: Cancer and Reproductive Harm - www P65Warnings ca gov s l California Residents WARNING: Cancer www P65Warnings ca gov TOOLS Product Part No. Spark Plug Indexer 920-0001 s By allowing you to consistently position spark plug ground electrodes out of harm’s way, the ARP indexing tool takes the guess-work out of installing spark plugs where the combustion chamber and high dome piston clearances is critical. Designed to fit in the palm of your hand, this tool eliminates the need to perform cylinder head calibration. Best of all, the ARP indexer is made from aluminum alloy with precision machined threads that allows you to proof the quality of spark plug threads before installation in expensive cylinder heads. Anodized for protection and quick recognition. For use with tapered gasket 14mm plugs. Spark Plug Indexer Size Part No. 1/4-20 911-0001 s 5/16-18 911-0002 s 3/8-16 911-0003 s 7/16-14 911-0004 s 1/2-13 911-0005 s M6 x 1 00 912-0012 s M8 x 1 25 912-0001 s M10 x 1 25 912-0002 s Size Part No. M10 x 1 50 912-0003 s M10 x 1.50 x 6.00 in. 912-0019 s M10 x 2 00 912-0014 s M11 x 1 25 912-0004 s M11 x 1 50 912-0005 s M11 x 1 50 x 152mm 912-0013 s M11 x 2 00 912-0011 s M12 x 1 25 912-0006 s Size Part No. M12 x 1 50 912-0007 s M12 x 1 50 x 6 00 in 912-0015 s M12 x 1 75 912-0008 s M12 x 1 75 x 6 00 in 912-0016 s M14 x 1.50 912-0017 s M14 x 2.00 912-0018 s Combination Sets Part No. USS Combo Pack (5-pc) - 1/4, 5/16, 3/8, 7/16, 1/2 911-0006 s Metric 1 25 Pitch Combo Pack (4-pc) - M8, M10, M11, M12 912-0009 s Metric Combo Pack (4-pc, std length) - M10, M11, M12 (1 50, & 1 75) 912-0010 s Thread Cleaning Chasers ARP’s handy thread cleaning chaser taps are designed with correct thread pitch and diameter to clean dirty blind or thru holes. Taps come in five USS sizes: 1/4˝, 5/16˝, 3/8˝, 7/16˝ and 1/2˝, as well as metric. They are sold individually or in sets. Please note that these are strictly cleaning taps and are not designed to cut thread. They are a handy addition to the tool box of any serious engine builder and an essential aid to preparing any block for final assembly. Don’t take a chance on weakening block and cylinder head threads. Use these handy thread cleaning chasers whenever possible!
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