Delta PT fasteners are engineered to provide maximum performance in a wide range of thermoplastics. The improved design results in a stronger fastener that creates optimal material flow during installation,providing higher performance,better clamp loads and increased joint life.

Key Advantages

◆Provides optimal performance in all types of thermoplastics

◆Provides increased torsional and tensile strength over PT fasteners

◆Provides high strength and in-place reliability

◆Can achieve higher clamp loads and seating torques

Features & Benefits

Flank geometry engineered to provide better material flow during installation

◆Provides high flank engagement

◆Can achieve higher clamp loads and seating torques

◆Optimizes material flow

◆May permit use of shorter fasteners and/or smaller diameters, if necessary

Larger fastener cross-section

◆Increases shear area and fastener strength

◆Offers increased fatigue life

◆Provides inereased torsional and tensile strength

Optimized pitch

◆Allows high clamp load with smaller contact pressuer

◆Minimizes radial stress

  With its extended core diameter and optimum thread design, the Delta PT fastener offers a longer fatigue life than the PT fastener. The Dlelta PT design provides better thread engagement and ,therefore,beter conditions against stress fractures of the thread flank. The chart above demonstrates that the Delta PT fastener provides greater resistance against screw breakage than the PT fasteners under in-service loads.

BOSS DESIGN RECOMMENG ATIONS

  The criteria for optimum hole diameter is to obtain the maximum clamp load during the installation process. A good starting point in determining the proper hole diameter is d=0.8×d₁ specific applicatinons will require some modifications to allow for the flexural modulus of the material,molding conditions,mold tool design,feed distance from gate,weld lines,structural heterogeneity and amount of reground mastrial. In order to ensure optimal performance, we recommend testing on initial samples. Please contact a Cunjin applications engineer for assistance.