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PEM brand miniature fasteners fit into a minimal space and provide strong, reusable threads. PEM miniature fasteners provide immediate visual indication when proper installation has been accomplished. A strong, knurled collar, which is completely embedded in the sheet, guarantees against rotation of the fastener in the sheet. The torque-out resistance of the knurl greatly exceeds the torque that can be exerted by the selflocking feature. A dry-film lubricant applied to these fasteners provides the smooth, non-galling prevailing torque performance necessary for reliable locking and for reusability.