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General Information & SpecificationsXR620/621/842/1045/1245/1254/1267/1534/2050/3034Table 1-12. Tightening Torque Values – Cap ScrewsNominal Diameter (Inches)and Threads-Per-InchSAE Grade 5 Cap ScrewsTightening Torque (Ft-Lbs)SAE Grade 8 Cap Screws1/4 20 8 (96) a 12 (144) a1/4 28 10 (120) a 14 (170) a5/16 18 17 (205) a 25 (300) a5/16 24 19 (230) a 27 (325) a3/8 16 31 (370) a 44 (530) a3/8 24 35 (420) a 49 (590) a7/16 14 49 (590) a 707/16 20 56 (670) a 781/2 13 76 1081/2 20 86 1209/16 12 110 154Table 1-12. Tightening Torque Values – Cap Screws – Cont.Nominal Diameter (Inches)and Threads-Per-InchSAE Grade 5 Cap ScrewsTightening Torque (Ft-Lbs)SAE Grade 8 Cap Screws9/16 18 122 1725/8 11 150 2125/8 18 170 2403/4 10 265 3753/4 16 295 4207/8 9 430 6067/8 14 475 6741 8 645 9091 14 723 10201-1/8 7 794 12871-1/8 12 890 1444Service Manual Rev 01 – 05/10 1-30P/N 24933-000