SI brand inserts employ press-in, molded-in, or heat/ultrasonic installation methods to provide strong, reusable, permanent threads in plastic. SI THREADED INSERTS FOR PLASTICSSI INSERTS FOR PLASTICS SI brand inserts employ press-in, molded-in, or heat/ultrasonic installation methods to provide strong, reusable, permanent threads in plastic. SI inserts are typically specified in applications where strong, durable metal threads are required in plastic material, especially where frequent assembly and disassembly of the unit for service or repair is necessary. Applications for SI products include: electronics (including wearables, smart phones and hand held devices), automotive, aerospace and defense, medical, transportation, industrial and recreational equipment. SI inserts are available in brass, stainless steel and aluminum. SI inserts are available in a large variety of ultrasonic / heat staking, molded-in or press-in types. Aluminum and stainless steel inserts for plastics offer lead-free alternatives to leaded brass typically used for brass inserts. Lead-free inserts offer alternative to leaded brass to address environmental and end-of-life recycling concerns. Alumin um inserts are approximately 70% lighter than brass equivalents and made from lead-free aluminum. Stainle ss steel inserts are typically stronger than brass and may offer better protection from certain types of corrosive agents. NEW compression limiters for plastic assemblies. SI microPEM inserts provide threads as small as M1. PART NUMBER DESIGNATION AND MATERIAL Lead-free, lightweight aluminum inserts. AND FINISH SPECIFICATIONS IU B - 440 - 2 Length Code (where applicable): See individual product charts for actual corresponding dimensional lengths. Thread Code: Internal, ASME B1.1, 2B / ASME B1.13M, 6H (except where noted). For PPB, PFLB, and PKB inserts collapsed slot and burrs may cause prevailing torque while thread accepts class 3A/4h screw. See individual product charts for actual corresponding thread size. Material Code: B = Free-machining, leaded brass. Plain finish. Meets RoHS requirements. C = 300 series stainless steel. Passivated and/or tested per ASTM A380. A = Aluminum. Plain finish. Type: IU = Ultrasonic/thermal, tapered IT = Molded-in, thru-threaded IUT = Ultrasonic/thermal, straight wall STK = Molded-in, knurled IUTF = Flanged, ultrasonic/thermal, straight wall NFP = Press-in, hexagonal IS = Ultrasonic/thermal, symmetrical PP = Press-in, thru-threaded MSI = microPEM, Ultrasonic/thermal, symmetrical PFL = Press-in, flange-head IB = Molded-in, blind threaded PK = Press-in, straight knurl IBL = Molded-in, self-locking blind threaded Insert drawings and models are available at www.pemnet.com Featuring threads as small as M1. SI-2 PennEngineering www.pemnet.com