PEM brand self-clinching nuts install permanently in aluminum, steel or stainless steel sheets. CL SELF-CLINCHING NUTSSELF-CLINCHING NUTS Self-clinching nuts are installed by placing them in properly sized holes in sheets and applying a parallel squeezing force to the head of the nut. The sheet metal surrounding the head cold flows into an undercut thereby making the fastener an integral part of the sheet. A serrated clinching ring prevents the fastener from rotating after installation. S/SS/CLA/CLS/CLSS nuts H (non-locking) and HNL (locking) provide load-bearing threads in thin nuts have threads that provide high sheets with high pushout and torque-out pushout and torque-out resistance - resistance - PAGES 4 and 5 PAGE 8 SP, PEM 300 nuts provide strong SH hard panel nuts install into thin, load-bearing threads in stainless steel harder, high strength steel materials - sheets as thin as .030/0.8 mm - PAGE 8 PAGES 4 and 5 SMPS/SMPP nuts are for thinner PEM RT free-running locknuts are sheet/close-to-edge applications - free-running until clamp load is induced. A PAGE 9 modified thread angle on the loaded flank provides the vibration resistant locking Material and finish specifications - PAGE 9 feature- PAGE 6 Installation - PAGES 10 and 13 SL self-locking nuts are designed with a unique and economical TRI-DENT locking feature, meeting 3 cycle locking Performance data - PAGES 14 - 17 performance requirements - PAGE 7 Many PEM self-clinching nuts in this bulletin are dimensionally equivalent to nuts manufactured to NASM45938/1 specifications. Consult our Marketing department for a complete Military Specifications and National Aerospace Standards guide (Bulletin NASM) on our website. Screws for use with PEM self-clinching locking fasteners should be Class 3A/4h fit or no smaller than Class 2A/6g. Fasteners For Stainless Steel PEM Stamp SP (Registered Trademark) Identification Mark PEM Two Groove (Registered Trademark) SMPP Identification Mark PEM RT Stamp (Registered Trademark) Fastener drawings and models are available at www.pemnet.com SH (Registered Trademark) CL-2 PennEngineering www.pemnet.com 2021 PennEngineering.