Inserts press into plastic without melting.

Press Release Summary:

Series 50 through-hole and Series 51 headed, through-hole press-in brass inserts can be cold pressed into plastic without heat or ultrasonic equipment. Inserts have helical knurl that optimizes plastic migration, providing good pull-out and torque resistance. Inserts can be installed with arbor press or fully automated machine into ABS and polycarbonate plastics. Applications include securing circuit boards and displays onto plastic housings.

Original Press Release:

Spirol International Introduces Press-In Insert Family

Brass inserts designed for pressing into plastic without heat or ultrasonic equipment

DANIELSON. CT - Spirol International Corporation has launched a new series of brass inserts intended to be cold pressed into plastic without melting the plastic prior to insertion. These inserts have been designed to be installed with either an arbor press or a fully automated machine. The new brass press-in inserts have a helical knurl designed to optimize plastic migration into the knurl. Extensive plastic migration into the knurl provides good pull-out and torque resistance. In addition, a generous pilot ensures proper alignment of the insert to the hole and perpendicularity after installation. This insert series is ideal for ABS and polycarbonate plastics in applications such as securing circuit boards and displays onto plastic housings. Spirol Series 50 is a through hole press-in insert and Spirol Series 51 is a headed, through hole press-in insert.

For more information on the Series 50 (through hole) or 51 (through hole, headed) press-in inserts or application information, contact: Spirol International Corporation, 30 Rock Avenue, Danielson, CT 06239-1434. Phone: (860) 774-8571 or Fax (860) 774-0487. Via Internet: or E-mail us at

SPIROL INTERNATIONAL CORPORATION is a leading manufacturer of a diverse line of engineered fasteners, including coiled and slotted spring pins, solid pins, spacers and other tubular products, as well as threaded brass inserts, milled brass nuts, shims, pin and insert installation equipment and vibratory parts feeders.

Manufacturing Quality Products Since 1945

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