Table 1. Icons to Identify Screw Shapes Icon Screw Shape Phillips/slot combo (+/-) Slotted (-) Minus (-) Hex bolt (cross-slotted) Hex bolt (slotted) Hex self-locking nut Hex socket cap (WAF: 5 mm) Hex socket cap (WAF: 6 mm) Hex socket cap (WAF: 8 mm)