2 INTRODUCTION VA INTERNATIONAL SYMBOLS the bolt strength. Identification is determined by the line marks on the top of each bolt head. The actual bolt strength grade corresponds to the number of line marks plus 2. The most commonly used metric bolt strength classes are 9.8 and 10.9. The metric strength class identification number is imprinted on the head of the bolt. The higher the class number, the greater the bolt strength. Some metric nuts are imprinted with a single-digit strength class on the nut face. Refer to the Fastener Identification and Fastener Strength Charts (Fig. 2) and (Fig. 3).
DESCRIPTION The graphic symbols illustrated in the following International Control and Display Symbols Chart (Fig. 1) are used to identify various instrument con- trols. The symbols correspond to the controls and dis- plays that are located on the instrument panel. FASTENER IDENTIFICATION DESCRIPTION The SAE bolt strength grades range from grade 2 to grade 8.
The higher the grade number, the greater 1 High Beam 13 Rear Window Washer 2 Fog Lamps 14 Fuel 3 Headlamp, Parking Lamps, Panel Lamps 15 Engine Coolant Temperature 4 Turn Warning 16 Battery Charging Condition 5 Hazard Warning 17 Engine Oil 6 Windshield Washer 18 Seat Belt 7 Windshield Wiper 19 Brake Failure 8 Windshield Wiper and Washer 20 Parking Brake 9 Windscreen Demisting and Defrosting 21 Front Hood 10 Ventilating Fan 22 Rear hood (Decklid) 11 Rear Window Defogger 23 Horn 12 Rear Window Wiper 24 Lighter Fig. 1 INTERNATIONAL CONTROL AND DISPLAY SYMBOLS