Overview

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.

Entity: Self-clinching nut installed in sheet metal. Key Information: Installation Process: A parallel squeezing force is applied to the head of the nut once placed in a pre-sized hole. Mechanical Lock: The surrounding sheet metal "cold flows" into an undercut, making the fastener an integral part of the sheet. Anti-Rotation: A serrated clinching ring prevents the nut from rotating after installation. Components: Visible threaded section, serrated ring, and undercut area engaged with the metal sheet.

Product Guide

S™/SS™/CLA™/CLS™/CLSS™ nuts provide load-bearing threads in thin sheets with high pushout and torque-out resistance - PAGES 28 and 29
SP™, PEM 300® nuts provide strong load-bearing threads in stainless steel sheets as thin as .030"/0.8 mm - PAGES 28 and 29
PEM RT® free-running locknuts (NEW) are free-running until clamp load is induced. A modified thread angle on the loaded flank provides the vibration resistant locking feature - PAGE 30
SL™ self-locking nuts are designed with a unique and economical TRI-DENT® locking feature, meeting 3 cycle locking performance requirements - PAGE 31
H™ (non-locking) and HNL™ (locking) nuts have threads that provide high pushout and torque-out resistance - PAGE 32
SH™ hard panel nuts install into thin, harder, high strength steel materials - PAGE 32
SMPS™/SMPP™ nuts are for thinner sheet/close-to-edge applications - PAGE 33
Material and finish specifications - PAGE 33
Installation - PAGES 34 and 35
Performance data - PAGES 36 - 39

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.

The image displays different registered trademarks used for identifying PEM self-clinching fasteners: PEM® Stamp: Identifying letters "P", "E", and "M" stamped onto the top surface of the nut. PEM® Two Groove: Two distinct horizontal grooves around the side of the fastener body. PEM RT® Stamp: "RT" letters stamped onto the top surface of the nut. SH: An "SH" stamp located on the rim of the fastener.

Identification marks: PEM® Stamp (Registered Trademark); PEM® Two Groove (Registered Trademark); PEM RT® Stamp (Registered Trademark); SH (Registered Trademark).

Topic: Fasteners for Stainless Steel Key Entities: SP Fastener: Features an "SP Identification Mark" (small circular indentation on the rim. SMPP Fastener: Features an "SMPP Identification Mark" (small circular indentation on the rim. Resource: Fastener drawings and models are available at www.pemnet.com.

Fasteners For Stainless Steel: SP Identification Mark; SMPP Identification Mark. Fastener drawings and models are available at www.pemnet.com

Product Guide

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