Threads and Lengths

THREAD TYPES

TYPE A - SHARP POINT	TYPE AB - SHARP POINT / TYPE B THREADS	TYPE F	TYPE 17
A thread forming screw for use in thin metal .015 to .050 thick. Used with drilled, punched or nested holes in sheet metal, resin impregnated plywood, among others.	A thread forming screw combining locating point of Type A with thread size and pitch of Type B. Normal limitations of Type B apply.	A thread cutting screw with machine screw thread and blunt tapered point, having multi-cutting edges and chip cavities. For heavy gauge sheet metal, lead, and others.	A thread cutting screw for wood with a coarse tapping screw thread and a special long sharp point fluted to capture chips.

PARTICLE BOARD	SELF-DRILLING TYPE	TYPE B - BLUNT POINT	HIGH-LOW - SHARP POINT
Reduced body diameter causing less distortion of material. Greater pitch angle of threads resists pull out. The increased depth & wider spacing of threads minimizes crumbling of material.	Innovative design allows drill and tap functions to be done in one easy, quick operation. Metal up to .500 thickness can be drilled and fastened easily.	A thread forming screw for use in heavier metal .050 to .200 thick. For light and heavy sheet metal, nonferrous castings, plastics, impregnated plywoods, among others.	High-Low screws have 30° and 60° included thread angles. Ideal for plastic, particle board, masonite and wood.

THREAD FORMING / TAPTITE^® / SWAGEFORM^®	MACHINE SCREWS	HIGH-LOW - BLUNT POINT	SELF PIERCING
Precision thread forming screws that form mating threads to produce tight fastening assemblies. Triangular-modified thread body. Low driving torques and high holding power.	Used in a pre-tapped hole or with a nut.	Same qualities as sharp point.	Thread forming screw with the ability to pierce its own hole in 20 ga. Steel or less, form a sleeve and tap mating threads. Sharp point angle of 30°. Can be single or double lead thread.

HOW TO MEASURE A SCREW


FLAT	ROUND	OVAL	HEX	PAN	TRUSS

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