1、 WORLDWIDE FASTENER STANDARD WA912 2013-10-04 Printed copies are uncontrolled Copyright 2013, Ford Global Technologies, LLC. Page 1 of 1 Revision 20131004 Redrew Fig. 1 and expanded Table 1 Dimensional Requirements for Under-head Locking Serrations 1. SCOPE. This standard gives dimensional requireme
2、nts for under-head locking serrations used on Right-Hand Threaded bolt designs. 1.1 REFERENCES. Material requirements and mechanical properties per WA950. 2. APPLICATION. These bolts are designed to give locking capability in select applications. 3. DIMENSIONS. Dimensions shall be as specified in Fi
3、gure 1 and Table 1. Figure 1 Table 1 Size C Serration Ht. No. of Teeth Cf Flange Ht. K Head Ht. G Min.1M5 0.36 0.12 24 1.36 1.12 5.96 4.92 6.2 M6 0.36 0.12 28 1.46 1.22 7.26 6.02 7.5 M8 0.36 0.12 36 1.56 1.32 8.86 7.32 10.0 M10 0.36 0.12 44 1.86 1.62 10.06 8.32 12.5 M12 0.36 0.12 52 2.16 1.92 12.46 10.42 15.2 M14 0.36 0.12 60 2.46 2.22 13.26 11.62 17.7 M16 0.36 0.12 70 2.76 2.52 15.56 13.12 20.5 1G Min is greater than da Max for Type F fillet per WA900
