Bülte’s slotted capstan screw DIN 404 25 October 2019

Bülte’s range of screws has recently been extended with the ‘slotted capstan screw DIN 404’ range, which is composed of an enlarged cylindrical head, a straight slot on the top of the head and two radial holes on each side of the head.

This new range of screws is fully in nylon, contrary to the metal DIN 404 screws usually available on the market. In comparison with the metallic fasteners, nylon fasteners offer various advantages; they are lighter, cheaper, and easier to recycle. They do not conduct electricity and are also not subject to corrosion.

Slotted capstan screws have a unique design in that head, which is similar to a cheese/pan head in shape, that includes two holes bored through the side of the head at 90 degrees to one another – serving a dual purpose. Firstly, the slotted capstan screw DIN 404 may be tightened by inserting a tee bar into the holes – when it is not possible to use a screwdriver to tighten the screw. Secondly, locking wires can be attached to the cross holes to secure the screw.

Slotted capstan screws DIN 404 are designed to be either tightened or loosened from the side rather than from the top, by inserting a small bar into one of the side radial holes in the head. This is very useful when there is restricted access to the top of the screw.

Slotted capstan screws DIN 404 are also applicable in such areas as machine building, instrument making, as well as industrial sectors for bonding structural elements from various materials.

In term of design, the standard colour of the slotted capstan screw DIN 404 is natural nylon. However, polyamide can be coloured on request according to the RAL chart, meaning the slotted capstan screw DIN 404 range will be in line with every kind of industrial application, whatever their colour might be.



Will Lowry Editor t: +44 (0) 1727 814 509


Will joined Fastener + Fixing Magazine in 2007 and over the last 12 years has experienced every facet of the fastener sector - interviewing key figures within the industry and visiting leading companies and exhibitions around the globe.

Will manages the content strategy across all platforms and is the guardian for the high editorial standards that the Magazine is renowned.