British Whitworth BSW & Metric Screws Bolts Pitch Measure Thread Gauge 51 Blades

About this item

• 51 Blades screw pitch gauge for thread size checking of various screw & bolts.
• 55 Degree British whitworth BSW & 60 degree metric thread pitch gauge.
• This pitch gauge accurately measures internal and external screw threads.
• The leaves are individually stamped with accurately formed thread profiles.