STAINLESS STEEL HEXALOBULAR PAN CHIPBOARD SCREWS

Hexalobular Pan Chipboard Screws — This part-thread pan head screw is built to draw two components together rather than grip a single board thickness along its full length: the plain shank section beneath the head passes freely through the clearance hole of a top component, so as the thread engages the chipboard beneath, the screw pulls the two parts together and clamps them tight — fixing brackets, fittings, or a secondary component to a chipboard carcass are typical applications. The pan head itself sits proud with a flat top and rounded edge, giving a larger bearing surface than a countersunk head, which suits fittings that have plain clearance holes rather than countersunk ones. Hexalobular drive is what sets this apart from the Pozidriv pan head equivalent: its recess resists cam-out and holds torque better than a cross-recess, which is the practical advantage when a large number of these screws are being driven with a power tool across a production or trade job rather than fitted individually. Chipboard screw thread form generally follows the DIN 7505 specification, with a sharper, coarser flank than a traditional wood screw thread, since particleboard's compressed particles need the thread to cut and grip mechanically instead of wedging between long fibres. On grade, A2 (304-equivalent) is the right, economical choice for the vast majority of indoor furniture and cabinetry assembly this screw is used for. A4 (316-equivalent) is worth the extra cost only where board-based fittings sit somewhere persistently damp or humid, since A2 could eventually develop surface corrosion in those conditions that A4 resists. Sizing means matching gauge to the fitting's clearance holes and choosing a length that gives the plain shank enough clearance through the top component while still leaving solid thread engagement in the board beneath — get this wrong and the clamping action either fails to draw the joint tight or the screw bottoms out before doing so.

FAQs
How does the part-thread shank function on this pan head screw?
The plain shank passes freely through the clearance hole of a top component so that, as the thread engages the board beneath, the screw draws the two parts together and clamps them tight.

What are these screws typically used for?
Fixing brackets, fittings, or components to chipboard where the head needs to sit proud in a pan profile and the joint needs to be clamped rather than driven into a single board thickness.

How does this differ from the full-thread pan version?
The full-thread version is threaded the entire length of the shank for engagement into a single piece of board; this part-thread version instead draws a top component down onto the board beneath.

Should I choose this or the countersunk part-thread version for a visible fitting?
If the fitting has a plain clearance hole and a proud head is acceptable, the pan head works well; if a flush finish is wanted, the countersunk part-thread version is the better match.