Fowler 52-485-051-0 Screw Pitch Gage with 51 Blades

Features:

• 51 blades, 4 to 84 pitch standard V thread
• Narrow designed blades permit use for internal and external screw threads
• Locking device at each end to secure all blades for storage or position
• Correct pitch is determined by matching blade teeth with threads
• Precisely ground and finished
• Blades marked with thread size