Aerospace ‘B’ Hi-Lok Protrusion Gauge – Black Markings Description: Omega Technologies 5 Piece Set of Precision Protrusion Gauges for nominal diameter Hi-Lok® and Hi-Tigue® fasteners in sizes 5/32”, 3/16”, 1/4”, 5/16”, and 3/8”. These Omega Technologies Protrusion gauges are larger than OM2-1522.

Omega Technologies Protrusion Gauges feature a modified Max Protrusion Limit and much tighter tolerances. The larger gauges in this set measure 1.05” square and permit a greater reach to check pins even if the collars have particularly wide bases or washers. Each Omega Technologies Protrusion Gauge is serialized for calibration and control purposes and all 6 pieces in this set feature the same serial number.