TOLEDO 301064 Thread Gauge Set - 4 Piece 

• Designed to easily identify thread diameter and pitch sizes in Metric, SAE, UNF, UNC and BSP fasteners
• Holes in gauges allow easy identification of component sizes
• Suitable for use to identify bolts, fittings, pipe and spark plug sizes
• Manufactured industrial aluminium

Specifications

• Metric: Thread size - 2.5– 22mm, thread pitch - 0.45–2.5mm
• USS (Small): Thread size - 1/4” – 3/8”, thread pitch - 16–44 TPI
• USS (Large): Thread size - 1/16”–1/2”, 10–18mm, thread pitch - 10–28 TPI, 1.00, 1.25, 1.50 (mm), 14, 18, 27 (TPI)