SPI 31-482-3 Pitch Master ID, 10 - 6.5 TPI / 2.5 - 4 mm

Features:

• Precision machined and chrome plated caliper and micrometer attachments with precision ground inserts for accurate measurements (sold separately).
• Range, 10 - 6.5 TPI / 2.5 - 4 mm pitch
• Caliper attachments are designed for use with 6" dial or electronic calipers with max. jaw thickness of 0.140"
• Ideal for quick checking threads in the machine shop.
• Furnished with instructions.