STAINLESS STEEL HEXALOBULAR RAISED COUNTERSUNK CHIPBOARD SCREWS FULL THREAD

Hexalobular Raised Countersunk Chipboard Screws Full Thread — Combining a raised countersunk head with full-length thread, this screw is built for visible or decorative chipboard fixing where the fitting is driven directly into a single thickness of board rather than clamping a separate top component. The head keeps the countersunk base of a standard flush pattern but adds a domed top that sits slightly proud once seated — often used with a cup washer that nests in the countersunk recess and supports the dome, giving a more finished appearance where the fixing is meant to be seen. Full thread runs the entire length of the shank, engaging the board consistently along its whole embedded length, which suits fixing straight into board rather than drawing a top piece down; where a separate component does need clamping onto the board, the part-thread version of this same head style is the better choice. Hexalobular drive gives this screw better resistance to cam-out than the Pozidriv equivalent, which is worthwhile wherever fixings are driven in volume or with an impact driver, such as shopfitting or production furniture work. Chipboard screw thread form generally follows the DIN 7505 specification, using a coarser, sharper flank than a traditional wood screw thread, since particleboard's compressed particles need the thread to cut and grip mechanically rather than wedge between long fibres. Grade choice depends on where the assembled item ends up: A2 (304-equivalent) is right for the large majority of chipboard furniture and fittings work, almost all of it indoors. A4 (316-equivalent) is worth the extra cost mainly where a visible fixing sits in persistently damp or humid conditions, since staining or pitting on an exposed domed head is far more noticeable than on a flush or hidden one. Sizing should match gauge to the fixing load and length to the board thickness, ensuring solid engagement without the point breaking through a thinner panel's far face.

FAQs
How does full thread differ from the part-thread version in this range?
Full thread engages the board along the entire shank, suited to fixing into a single thickness of board, whereas the part-thread version has a plain shank section that lets it clamp a top component onto the board beneath.

How does this compare to the Pozi raised countersunk chipboard screw?
The head shape and thread pattern are the same; this version uses a hexalobular drive, offering better cam-out resistance than the Pozidriv equivalent under power-tool driving.

Is a cup washer needed with this screw?
Not required, but it's a common pairing that supports the domed head and adds a more finished look, particularly where the fixing remains visible.

Why choose a raised countersunk head instead of a fully flush one for chipboard work?
Mainly for appearance — a raised head reads as more decorative or finished where visible, while a flush countersunk head suits work where a completely level surface is required.