V-COIL Wire thread insert Screw locking type SL 

Application:

• Thread Repair of damaged or worn-out threads

• Thread Armour Plating for material with low shear strength

• Recovery of rejected items

• provided for applications with effects of cyclic vibration or impact

• only close fit plated or lubricated bolts or screws are used with screw locking inserts Type SL

Advantages:

• produced from precision profiled austenitic stainless steel wire wound into a helical spiral

• spring like appearance

• for high strength and long-lasting internal threads

• higher temperature and corrosion resistance

• higher load capacity after the repair by better thread properties

• additional security of prevailing locking torque

• can generally be incorporated into existing designs where no previous provision has been made

• position is maintained by the action of radial pressure between their coils and the flanks of the tapped hole

Operation:

• One or more polygonal grip coils press exert radial pressure on the male thread.

• Each grip coil consists of a number of tangential locking chords which protrude inside the minor diameter of the normal free running coils.

• As the male thread passes through these grip coils, the locking flats are displaced thus exerting radial pressure or prevailing torque on the male thread.

• On removal of the male thread, the locking coils relax to their original for permitting repeated assembly whilst retaining a measurable level of prevailing torque.

  Type of thread	metric ISO-thread
  Standard	DIN 8140
  Material	from stainless steel
  Tolerance	ISO2 (6H)
  Size	M 4 x 0.7
  Length	2.0 x D