Profasten

POZI DRIV / COUNTERSUNK (CSK) HEAD/ ZINC OR CHROME POLISH

PROFASTEN Chipboard Screws have deeper threads, run all the way along the screw’s length to the underside of the head. This makes chipboard screws particularly useful where an extra-strong hold is required. Chipboard screws are among the most common mechanical woodworking fasteners and are primarily used for joining wood to wood. These are sometimes referred to as ‘particleboard screws’. Whatever name they go by, they are self-tapping components, generally featuring a thin shaft and a coarse thread that make them suitable for all types of timber including hardwood, softwood, MDF and the eponymous chipboard. Having a good handle on just three main features of chipboard screws will help: length, gauge, and thread. Gauge refers to the diameter of chipboard screw. In most cases, you will be using #6, #8, #10 or #12 gauges of chipboard screws. Keeping in mind that as gauge numbers increase, the screw becomes larger in diameter. So, a #6-gauge drywall screw would be thinner than a #8 drywall screw. Actual sizes of chipboard screw gauges:

#6 – 3.5 mm or 0.138 inch
#8 – 4.0 mm or 0.158 inch
#10 – 5.0 mm or 0.197 inch
#12 – 6.0 mm or 0.237 inch

• PoziDriv or Positive Drive: Pozidriv, commonly spelled incorrectly as “Pozidrive”, is an improved variation on the Philips drive design. The Pozidriv drive style was originally formed to address the largest issue Phillips heads are prone to: cam-out. Cam-out is defined as the slipping out of a drive recess that occurs when torque exceeds a certain limit. The pozidriv drive style has the same self-centering design of a Phillips drive style but improves upon the two following factors:

1. Increased torque without cam-out
2. Greater surface contact engagement between the drive and the recess in the fastener head making it harder to slip when installed correctly.

• Countersunk (CSK) head: A countersunk screw is a screw that is “sunk” into a piece of lumber. The head will sit below the surface of the material and it can easily be filled with a wood plug or filler.
• Coatings: Chipboard screws commonly have zinc coating to resist corrosion. In some cases, nickel or chrome coating is also preferred.

WHAT SETS GRIPSON SCREWS APART FROM THE REST

PROFASTEN	OTHERS
PROFASTEN screws are made using the 1022/1018 grade made from material of Usha steel/Jindal steels.	Low grade wire to save cost.
Case hardened with accurate deepness due to appropriate way of heat treatment of screws.	Inappropriate way of hardening.
Changes the dies and punches of header machine more frequently to ensure better quality.	Uses dies and punches for much longer period resulting in varying sizes and non-uniform batches of screws.
In-house facility for heat treatment, polish and packing ensures monitoring at every stage of production	Sub-contracting leads to mix of various batches of screws
In-house facility for heat treatment, polish and packing ensures monitoring at every stage of production.	Sub-contracting leads to mix of various batches of screws
Well – Inspected	No Inspection

POZI DRIV / COUNTERSUNK (CSK) HEAD/ ZINC OR CHROME POLISH

WHAT SETS GRIPSON SCREWS APART FROM THE REST

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