Raceworks have three thread identification kits in the range, suitable for common performance applications. These include metric, imperial/AN and tapered threads (NPT and BSPT). The testers are CNC machined from stainless steel, and contain both a male and female.

Raceworks offer a range of tools to assist with assembling your hoses and fittings and are made of high quality materials and are built to last.

All Raceworks products come with a 2 year warranty.

Included Sizes:

• 3/8" – 20
• 3/8" – 24 (AN-3)
• 7/16" – 20 (AN-4)
• 7/16" – 24
• 1/2" – 20
• 9/16" – 18 (AN-6)
• 9/16" – 24
• 3/4" – 16 (AN-8)
• 7/8" – 14 (AN-10)
• 1-1/16" – 12 (AN-12)
• 1-5/16" – 12 (AN-16)
• 1-5/8" – 12 (AN-20)

https://raceworks.com.au/tools/thread-identification-kits/an-imperial-thread-identification-kit-12pce/