Test Reference

Pushout Test

Pushout tests shall be performed from the grip or shank side of the installed fastener. An axial load shall be applied to the fastener as shown using a hardened test screw, while evenly supporting the test strip around the fastener. The typical position rate is .25" / 6.35 mm per minute. Dimensions are identified per PEM Bulletins where "E" equals head diameter and "T" (or "L") equals head height. The pushout force is measured using a force or compression tester with a range that will cover the expected forces.

Test drawing callouts: Applied Load (Compression Tester); Hardened Test Screw/Bolt Grade 5 or better; Test Strip Thickness > dash length; T; 2T (Min.); E; E +.063" ±.01 / +1.6 mm ±0.25; Surface of compression force measuring gage; Hardened Support Bushing of sufficient wall thickness to withstand compression loads applied.

Torque-out Test

Torque-out tests shall be performed from the shoulder or head side of the installed fastener. Torque shall be applied to the fastener in the manner illustrated, using a hardened test screw and washer, while firmly holding the test strip. Test screws should be of sufficient tensile strength to resist thread stripping. A minimum of two screw threads must extend beyond the fastener.

Test drawing callouts: Applied Torque; Driver for applied torque; Washer - Approximately 1 to 2 pitches. Thick enough to prevent neck of screw from contacting threads.; Hardened Test Screw/Bolt Grade 5 or better; Test Strip (parent material). Held firmly in a vise.

Self-Piercing, Self-Clinching Tooling

Specialized PEMSERTER® tooling allows installation of S self-clinching nuts into aluminum sheets (sizes 1/4", 5/16", M6 and M8) in one pierce/press operation.

For more information, see our web site for Tech Sheet PEM® - Ref / Self-piercing, self-clinching tooling. To locate, simply type "self-piercing" in site search box.

Drawing callouts: Embossment; Punch; Chassis; Anvil; Pierced Slug.