DIN 7504 Self-Tapping Screw with Raised Countersunk Head and Drill Point, Form R

DIN 7504 is a European standard establishing the parameters of self-tapping screws with a raised countersunk head and drill point, form R. The product features a cross recess for driving with a cross-head screwdriver or power drill.

The main purpose of the product is to fasten metal sheets to frames; it is most often used when working with aluminium metal structures. The self-tapping screw allows the structural element to be installed without pre-drilling a hole.

Manufacturing features and characteristics

Self-tapping screws are made of St steel, which is electroplated with a zinc coating to improve corrosion resistance. The screws are also made of austenitic steel A2 and A4, usually steel 12×18N9T, AISI 304. The fasteners have the following characteristics:

• Nominal length of the product ranges from 9.5 to 50 mm.
• Drill diameter may vary from 2.3 to 5.8 mm.
• The most common thread variants are ST2.9, ST3.5, (ST3.9), ST4.2, ST4.8, ST5.5, ST6.3.

This type of self-tapping fastener is used for siding, metal roof tiles, profiled sheeting, and other construction and finishing materials. It provides a secure fastening with a minimal hole size, and the raised countersunk head sits flush with the material.

Order terms

FLOK supplies fasteners in both large and small wholesale batches, with a discount system available for wholesale buyers. Ongoing supply is available, with shipments sent to any region of Russia.