Pre-applied nylon patch 267-28 KLF

DIN 7991 KLF — head seating and locking treatment operation

This design requires consideration of two connection areas: countersunk head support and engagement of the treated thread. The countersink must match the head geometry, and the treated thread section should engage a nut or threaded hole. Nylon does not compensate for incorrect screw seating.

Selection according to the part drawing

• Countersink: compare its angle, diameter and depth with the requirements for the selected screw.
• Length: read the dimensioning method from the product drawing and account for the thickness of the joined parts.
• Thread: check diameter, pitch, engagement length and KLF layer position.
• Drive: choose the hex key size and provide access to the socket.
• Design: confirm material, mechanical properties and protective coating.

What does resistance during insertion mean?

The nylon layer increases mechanical rotational resistance. This alone does not confirm correct head seating in the countersink or achievement of the required clamping force. Establish tightening parameters for the specific screw, locking treatment and material of the joined parts.

Questions about countersunk screws with KLF

Does the head always sit flush with the surface?

This depends on countersink preparation and dimensional compatibility. Assess the result using the connection drawing.

Can the screw be reinstalled?

Check permission and cycle count in the documentation of the specific treatment. A similar layer colour does not confirm identical parameters.

How do you prepare an enquiry for NERON in Piła?

State DIN 7991, screw dimensions, material, class, requirements for 267-28 KLF and number of pieces. Include a drawing if head or treated-section position is important. See DIN 7991 with pre-applied thread treatment and the complete pre-applied thread treatment section.