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PEM® self-clinching locknuts prevent mating hardware from loosening.

SELF-LOCKING FASTENERS PEM® SELF-CLINCHING LOCKNUTS PREVENT MATING HARDWARE FROM LOOSENING PEM® self-clinching locknuts provide ideal solutions to prevent mating hardware from loosening in service due to vibration or other application-related factors. This family of fasteners includes a variety of types and different lockingfeature styles to satisfy a wide range of applications. Their use can save time and money compared with alternative chemical locking methods or patches. ABOUT LOCKING THREADS PEM® locknuts include two locking designs: 1) PREVAILING TORQUE (CFN™, FE™, FEO™, UL™, LAS™,...

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PL™/PLC™ PEMHEX® nuts with a nylon hexagonal element provide a locking option for applications where a metal on metal locking feature is not desired - PAGE 8 SL™ locknuts offer a cost effective TRI-DENT® locking feature and effective prevailing locking torque - PAGE 9 PEM RT® locknuts are free-running until clamp load is induced. A modified thread angle on the loaded flank provides the vibration resistant locking feature- PAGE 10 NEW Material and finish specifications - PAGES 11 Performance data - PAGES 16 - 20 LOCKING NUT SELECTOR GUIDE PEM Locking Nut To meet national aerospace standards...

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CFN™ BROACHING LOCKNUT• For thinner sheets, close-to-edge applications. • Prevailing torque locking element provides torque to eliminate loosening of mating threaded hardware. Nylon locking element (Blue identifier* for unified fasteners / black identifies metric fasteners) PART NUMBER DESIGNATION CFN - 440 - 1 Zi Type Thread Shank Finish Code Code Code

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SELF-LOCKING FASTENERS FE™/FEO™/UL™ LOCKNUTS • Strong, knurled collar guarantees against rotation of the fastener in the sheet. • The torque-out resistance of the embedded knurl greatly exceeds the torque that can be exerted by the self-locking feature. Tops elliptically squeezed PART NUMBER DESIGNATION UL – 080 – 0 Thread Code Clinching profile may vary. Shank Code Finish Code All dimensions are in inches. Size Hole Min. Max. Hole Shank A Sheet In Sheet C T Dist. In Thread Type Thread Code (Shank) Thickness +.003 +.000 D E +.015 Hole /L Attached Size Code (1) Max. (2) –.000 –.005 Max....

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LAST7LAC™/LA4™ LOCKNUTS ■ Provide load-bearing threads in thin sheets and permit a minimum of ,030"/0.76 mm adjustment for mating hole misalignment. • Extra strength and support in assembly is obtained by the threads of the floating nut extending into the retainer shank. • Thread locking torque performance is equivalent to applicable NASM25027 specifications. • LA4 floating fasteners are specifically designed to be installed into stainless steel sheets. Float - ,01570,38 mm minimum, in all directions from center, ,03070,76 mm total, All dimensions are In Inches. (1) This shank code is not...

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LK™/LKS™/LKA™ PEMFLEX® LOCKNUTS The PEM design utilizes two rugged, semicircular flexing jaws instead of several less-supported segments. The greater ruggedness and retention of this PEMFLEX® action prevents relaxation and loosening of the fastener in severe service. This design also protects the screw threads. Clearances obtained by only two interruptions of a full circumference, together with the spreading of the jaws by the entering screw, minimize the possibility of thread damage. • Hex shoulder provides increased pull-through performance and a positive stop during installation. • The...

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PLT7PLC™PEMHEX® LOCKNUTS ^ L > • Thread locking torque performance is equivalent to applicable NASM25027 specifications. • The strong knurled collar receives the installation force and resists torque. • The spin resistance of the knurl greatly exceeds the torque that can be exerted by the self-locking feature. (1) Can be used in panel thickness of ,040" to ,06071 mm to 1.53 mm provided the fastener is not fully installed. The knurled collar must be left protruding above the sheet to the degree that the sheet thickness is less than ,06071,53 mm, See installation instructions, (2) Knurled...

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• SL locknuts meet 3 cycle locking performance (1). • Recommended for use in sheets HRB (Rockwell "B" scale) 80 or less and HB (Hardness Brinell) 150 or less. PART NUMBER DESIGNATION SL - 440 - 1 Z Type Thread Shank FinishCode Code Code PEM TRI-DENT® Locking Feature. Locking feature appearance may vary. (1) Achieved using steel socket head cap screws, 180 ksi / property class 12.9 with standard finish of thermal oxide and light oil.

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PEM RT® FREE-RUNNING LOCKNUTSFree-running locking feature allows screw to turn freely until clamp load is applied. If the tightening force is removed, these nuts no longer provide any torsional resistance to rotation until clamp load is reapplied.• Resistant to vibrational loosening. Back side of panel is flush or sub-flush for screw installation. Locking feature reusability is not affected by number of on/off cycles. Uses same mounting hole and installation tooling as standard S™ nuts. Recommended for use in steel or aluminum sheets HRB 80 / HB 150 or less. tJ PART NUMBER DESIGNATION S -...

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SELF-LOCKING FASTENERS MATERIAL AND FINISH SPECIFICATIONS Fastener Material Floating Fastener Nylon Locking Internal, Element Retainer Retainer Retainer Nut Internal, Internal, UNJ Class 3B per (1) Blue or Black Type ASME ASME ASME B1.15 / Modified 300 Temperature Hardened 300 300 B1.1, 2B / B1.1, 3B / MJ Class 4H6H per Thread Form Hardened Series (2) Limit Hardened 400 Series Series Series ASME ASME ASME B1.21M on Loaded Carbon Carbon Stainless 7075-T6 250˚ F/ Carbon Stainless Stainless Stainless B1.13M, 6H B1.13M, 6H (M6 thread 4H5H) Flank Steel Steel Steel Aluminum 120˚ C Steel Steel...

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INSTALLATION NOTES • For best results we recommend using a Haeger® or PEMSERTER® machine for installation of PEM® self-clinching fasteners. Please check our website for more information. • Visit the Animation Library on our website to view the installation process for select products. CFN™ NUTS 1. Prepare properly sized mounting hole in sheet. Do not perform any secondary operations such as deburring. 2. Insert fastener into the anvil hole and place the mounting hole over the shank of the fastener (preferably the punch side) as shown in drawing. 3. With installation punch and anvil surfaces...

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