Screw Checker (SKU: SCG211)

Product Description

Identifies:

• Machine screws
• Bolts
• Up to 5/16 diameter

1. Pass screw through smallest hole to determine size.
2. Screw into threaded holes to determine thread pitch.
3. Numbers on the face indicate: screw size, clearance drill size, tap drill size, tap series, (n.c., n.f., n.s.)