Alma Bolt Company & Prime Fasteners 1-800-526-2200

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Bolt Gauges

Steel Screw Gauges

These metric screw checkers tell the length in millimeters and inches, Tap Series, I.S.O. preference rating, Size (in millimeters), Pitch (in millimeters), Clearance Drill Size, Tap Drill Size, and Basic diameter (in inches). We carry both Au-ve-co® steel screw gauges for screws 2MM thru 7MM and 8MM(PN-12142) thru 14MM(PN-12143).

Metric Screw Pitch Metal Gauge

American Screw Thread Metal Gauge measures the number of threads per inch (from 8 to 44) on screws and bolts. The gauge contains 18 blades.
Part#: 18196

Bolt Gauges

Just push the bolts through the holes to find the bolt diameter. The length gauge measures"regular" heads from the left end and countersunk head front eh notch at the right end. Nuts drop on the plugs along the top edge of the gauge. S.A.E. fine thread nuts fit to the base of the plugs, U.S.S. coarse thread nuts fit half-way.


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