SEBO Screw F 3.9 x 13 (DIN 7981) for X, G, 370, 300/350, C and D Series, ET-C, ET-H and DISCO

Few fasteners turn up on as many SEBO machines as this one. The F 3.9 x 13 to DIN 7981 is listed for the X and G ranges, the 370, the 300 and 350, the C and D series, the ET-C and ET-H power heads and the DISCO, which makes it the screw worth keeping two of in the drawer before anything goes wrong. DIN 7981 gives it a cross-recessed pan head on a self-tapping thread, so it drives straight into a moulded boss and needs nothing behind the joint.

It measures 3.9 mm across the thread and 13 mm under the head, and it does the ordinary work of holding covers, brackets and cable clamps where they belong. When one strips, the panel it held starts to lift at a corner and rattle over hard floors, and the fasteners either side of it then carry a load they were never sized for. Catching that early keeps the repair down to a single screw.

• Part number: 102
• Fits: the SEBO X, G and 370 ranges, the 300 and 350, the C and D series, the ET-C and ET-H power heads, and the DISCO
• Specification: F 3.9 x 13 to DIN 7981
• Head and drive: cross-recessed pan head
• Size: 3.9 mm diameter, 13 mm long
• Sold: each
• Longer 3.9 mm DIN 7981 screws: part 103 at 16 mm, part 105 at 19 mm and part 104 at 25 mm
• Stainless equivalent size: part 106, a 3.9 x 13 to DIN 7981-A2

Order as many as the repair needs, since these are supplied individually rather than in a packet. Tighten to firm hand pressure only. The thread is cut in plastic and will not take a torque setting meant for metal, and the fastest way to turn a five-minute job into a housing replacement is to lean on the driver at the end of the stroke.

This is the part behind searches for a SEBO 3.9 x 13 screw, a SEBO ET-C power head screw, a DIN 7981 vacuum fastener or a genuine SEBO 102. Genuine SEBO hardware from an authorized dealer, out the door in 2-5 business days.