SEBO Screw C 3.9 x 16 (DIN 7981) for X, FELIX, G and 370 Series, ET-C and DUO

Step up from the 2.9 mm screws and you reach the 3.9 mm size, used where a joint carries load rather than simply holding a cover shut. SEBO lists the C 3.9 x 16 to DIN 7981 across the X, FELIX and G series machines, the 370 series, the ET-C power head and the DUO, and supplies it individually as part 103. The DIN 7981 form is a cross-recessed pan head on a self-tapping thread.

A loose screw in a load-bearing position does not stay a small problem. The hole elongates as the joint works, the moulding flexes at every push of the machine, and the crack that follows turns a fastener job into a housing job. The early warning is a panel that has begun to move under hand pressure at one corner, long before anything is audible.

• Part number: 103
• Fits: the SEBO X, FELIX and G series machines, the 370 series, the ET-C power head and the DUO
• Specification: C 3.9 x 16 to DIN 7981
• Head and drive: cross-recessed pan head
• Size: 3.9 mm diameter, 16 mm long
• Sold: each
• Other lengths in the same family: part 102 at 13 mm, part 105 at 19 mm and part 104 at 25 mm

Tighten to firm hand pressure only, since the thread is cut in plastic and will not take a torque setting meant for metal. If the replacement spins without pulling down, the boss rather than the screw has failed, and moving up to a longer screw only splits the moulding further along.

This is the fastener behind searches for a SEBO FELIX chassis screw, a SEBO 370 series body screw, a DIN 7981 3.9 x 16 replacement or a genuine SEBO 103. Take a moment to match the length against the one you removed, because all four screws in this family carry the same head. Genuine SEBO part from an authorized dealer, dispatched in 2-5 business days.