Threaded Fasteners 00.04 General Information 1 2 3 4 5 6 07/27/95 f310466 NOTE: Grade 2 (S.A.E.) and grade A (I.F.I.) nuts have no identification marks or notches; they are rarely used by Freight- liner. Grade B (I.F.I.) nuts have three identification marks at 120 degrees, or 6 notches. Grade C (I.F.I.) nuts have three identification marks at 60 degrees, or 12 notches. Grade G (I.F.I.) flanged nuts have six identification marks as shown; each identification mark may be a dot, line, pair of dots or lines, or any other symbol at the manufacturer’s option. 1. S.A.E. Grade 2 or I.F.I. Grade A Nut (strength compatible with grade 2 bolt.) 2. S.A.E. Grade 5 Nut (strength compatible with grade 5 bolt.) 3.
I.F.I. Grade B Nut (strength compatible with grade 5 bolt.) 4. S.A.E. Grade 8 Nut (strength compatible with grade 8 or grade 8.2 bolt.) 5. I.F.I. Grade C Nut (strength compatible with grade 8 or grade 8.2 bolt.) 6. I.F.I. Grade G Nut (flanged locknut; strength compatible with grade 8 or grade 8.2 bolt.) Fig. 3, Nut Grades 1 2 2 f310226a 10/19/93 f310227a 05/03/91 NOTE: In addition to the class markings, the bolt head must also carry the manufacturer’s trademark or identifi- cation. 1. Class 8.8 2. Class 10.9 1. Class 8 Nut 2. Class 10 Nut Fig. 5, Nut Classes Fig. 4, Bolt Classes Business Class M2 Workshop Manual, Supplement 0, January 2002 050/3 8.8 8.8 1 10.9 10.9