Simonswerk Flag Hinges

SKU: 1481/1482 Category:
(2 customer reviews)


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Simonswerk K4040 and K4145 flag hinges in a choice of profile upstand options. Suitable for uPVC doors.

These hinges are supplied individually.

Simonswerk Flag Hinges Features

  • 3D adjustment (side +/-5mm, height +5mm/-1mm, compression +/-2mm)
  • K4040: 15mm-19mm step size
  • K4145: 18mm-22mm step size
  • To suit square profiles
  • White or brown finishes
  • Fixing screws included
  • Maintenance free slide bearings
  • Height: 98mm
  • Width: 87.5mm
  • Drilling jig also available (see Customers also bought below)

Additional information

Weight 2.000 kg



3D, Flag, uPVC


White, Brown


15-19mm upstand, 18-22mm upstand

Part numbers

K4045, K4145


2 reviews for Simonswerk Flag Hinges

  1. Anonymous

    I have installed this product, which arrived very promptly, as a replacement for an existing one of unknown make which cracked. It was vital to have a diagram of the screw holes as I was able to see that their spacing was similar to the existing holes in my door The product is indeed very similar to the replaced hinge except that it has a few mm wide strip at the end of the flange in the flag part of the hinge which is moved by the incorporated bolt. This strip, at right angle to the flange, has two short stubs which go into the side of the door. I didn’t have the holes in the door for these so I had to take the door off to create them. I needed to widen these holes and those in the door for the stubs in the movable flange, in order to get the flag part of the hinge to fit successfully using the existing screw holes in the door, as hoped when ordering. With the flag part of all three hinges inserted in the stubs in the parts of the hinges fixed to the door frame and unattached from the door, I raised the heavy door to the correct level on boards and then attached the flag parts starting with the middle one of the three hinges. Job done.

  2. S.A. Bullman (verified owner)

    A sturdier hinge than those which they replaced, the pintle being both thicker and of a heavier section required no packing pieces, but on the down side a drilling pattern would be appreciated, all in all a satisfactory product.

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What is the profile upstand size?

The profile upstand, or frame upstand size is the height of the ‘step’ between the frame edge and the sash edge that a flag hinge needs to clear in order to fit correctly. As most flag hinges are adjustable they can be adjusted from a minimum to a maximum upstand size, commonly around 15 mm to 23 mm.

Check that the hinge you are purchasing is suitable for the frame upstand of your door.

Frame Upstand (or Profile Upstand) size

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