Screw Checker
SKU: SCG211
Identifies:
- Machine screws
- Bolts
- Up to 5/16 diameter
- Pass screw through smallest hole to determine size.
- Screw into threaded holes to determine thread pitch.
- Numbers on the face indicate: screw size, clearance drill size, tap drill size, tap series, (n.c., n.f., n.s.)
