4th Generation
Thread forming Tapping Screw for thermoplastic!!

Nonsert Steel 3Cr. Plating thickness 5μm guarantee.

NonSert Application Situation

• Saving the cost without metal insert
• Repeatable application
• Plastic Crack happend place
• Torque Controlled Production

Applications

• 

  HOCHIKI Corporation
  Gas alarm

  By adopting nonsert, it can be used as it is for resin and it becomes possible to use it repeatedly for maintenance

• 

  Plasma TV stand

  By adopting nonsert, costs are reduced without requiring inserts

• 

  Welco Corporation
  High performance small tube pump

  Adopted nonsert for fastening of motor part and tube part housing

• 

  Trolley for pachinko parlor

  Even with heavy pachinko balls it is hard to loosen
  Nonsert is also strong for loose

SY-Non-Sert for SANYO DENKI FAN '' SAN ACE ''

This is special Non-Sert with development together.
"120° Flat Head type and Small Pan Head type Nonsert"
These SY-Non-Serts are is recommended
by the SANYO DENKI CO., Ltd Technical date as below.

Resin, Plastic and Engineering Plastic Fastening Plastic counterpart is much weaker than Steel Screw.
Therefore, to prevent the plastic breaking or cracking, SAIMA is stronly recommended to use “specialized screw for plastic”.

1st Generation: JIS B 1122 type 2 (Self-Tapping Screw for Plastic)

Suitable for thin plate and plastic fastening as stated in JIS B1122 appendix.
Widely distributed as a standard screw. Average Performance.

2nd Generation: B-type (Self-Tapping Screw for Plastic)

Advanced form of JIS B 1122 Class 2, with trilobular thread, same thread angle (60 degree) and pitch.
Tightening Torque is lower than 1st generation according to torque analysis result.
Suitable for thin plate and plastic fastening.

3rd Generation : P-type (Self-Tapping Screw for Plastic)

Double threaded with 45° thread angle, wider thread compared with B-type and trilobular thread.
Double started thread makes the fastening speed twice high, but loosens faster once the screw starts loosening.
This makes TF point and TD point higher, so we havet to pay attention F/D ratio.
This is not suitable for repeated application on the same pilot hole.
TD: Torque of Driving
Min. Torque for fatening

TF: Torque of Failure
Torque for breaking counter material. it includes idling and crack

TS: Torque of Setting
Best Torque of Setting

4th Generation : Non-Sert (Self-Tapping Screw for Plastic)

Single threaded same as 1st and 2nd Generation with 30 degree thread angle, trilobular thread shape and large pitch. Lowest TD(Torque of Driving) in all generations. Low stress against the plastic part. TF(Torque of Failure) is lower than 3rd Generation, but mostly T/F ratio indicate higher, these results conclude that using Non-Sert is safe and best for plastic fastening. In addition that Best for repeat use on the same hole.