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HI-LO® Fasteners - For Plastic and Other Low Density Materials

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ADVANTAGES:
Perfect screw for low-stress applications
Reduced cracking in plastic bosses
Smaller sized bosses can be designed to save in material and space
Increased pull-out resistance
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AVAILABLE FEATURES:
SEMS - add a washer under the head to span larger holes,
protect fragile surfaces, and distribute load.
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The 30º included angle of the high thread displaces less material when it is driven into plastic or wood and, therefore, requires lower driving torques. A greater amount of material remains between the high threads, increasing the stripping torque. Low driving torque and high stripping torque provide maximum protection against stripping problems. Hi-Lo Figure 1
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ABOUT HI-LO®:

The HI-LO fastener is the minimal performance solution for fastening in low pressure environments such as plastic, particle board, masonite, and wood. It’s designed with a double-lead thread where the HI thread is sharper than a conventional one. More material is trapped in between the threads which helps to resist pull-out. This also allows for a lower driving torque.

HI-LO® PLUS Fasteners - for Plastic, Wood, Die Cast Metals and Other Materials

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THREAD ANGLE:
Both the high and low threads have a sharper (30°) angle than conventional threads and incorporate a 45° angle step on their trailing flank. These slim threads penetrate deeply without weakening the material through stress-caused fracturing.
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THREAD FORM:
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Hi-Lo PLUS Figure 3
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Hi-Lo PLUS Figure 2
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In forming mating threads in the work piece, the unique Hi-Lo Plus screw accommodates the displaced material between the widely spaced high threads, actually increasing thread engagement while minimizing outward pressure.
 
SUPERIOR PERFORMANCE:

The Hi-Lo Plus fastener, with its alternating high tend low threads, effectively engages in a wide lange of low density materials. This versatile fastener can be used in soft or hard plastics, die cast metals, particle board and wood. By providing reliable fastening in such a wide range of materials, the Hi-Lo Plus fastener opens the door to new standardization opportunities. By specifying the proper hole size, the same type and size of screw can be used in a variety of materials and applications.

In fastening effectiveness, the Hi-Lo Plus screw is greatly superior to other thread forms used in comparable applications. Other thread forming screws require larger holes to minimize the risk of cracking or splitting the material in which they are driven. Less material is therefore displaced and there is less thread engagement.

For more information about our products, or to request a product catalog, e-mail us: sales@shakeproof

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