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Self Locking Fasteners

Self Locking Fasteners
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SELF-LOCKING FASTENERS

SELF-LOCKING FASTENERS PEM® SELF-CLINCHING PREVAILING TORQUE LOCKNUTS PREVENT MATING HARDWARE FROM LOOSENING PEM® self-clinching prevailing torque 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 locking-feature 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 PREVAILING TORQUE – a design feature of the lock nut...

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SELF-LOCKING FASTENERS Types LK/LKS/LKA nuts have a rugged PEMFLEX® self-locking feature which meets demanding locking performance requirements - PAGE 7 Flexing Jaws Types 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 Type CFN broaching fasteners are available for thinner sheet, close-to-edge applications. The nylon locking element provides prevailing torque to eliminate loosening of mating threaded hardware - PAGE 4 Nylon Insert Nylon Insert Types FE/FEO/UL miniature locking nuts,...

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SELF-LOCKING FASTENERS TYPE CFN Type CFN broaching fasteners are for thinner sheets, close-to-edge applications. The 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 C Thread Code Shank Finish Code Code Clinching profile may vary. All dimensions are in inches. Thread Size Thread Code Shank Code Hole Size In Sheet +.003 –.000 Min. Dist. HoleC/L To Edge All dimensions are in millimeters. Thread Size x Pitch Thread Code Shank Code Hole...

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SELF-LOCKING FASTENERS TYPES FE/FEO/UL A strong, knurled collar, which is 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 self-locking feature. Tops elliptically squeezed PART NUMBER DESIGNATION Clinching profile may vary. Thread Code Shank Finish Code 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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SELF-LOCKING FASTENERS TYPES LAS/LAC/LA4 These fasteners 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. Type LA4 floating fasteners are specifically designed to be installed into stainless steel sheets. To meet national aerospace standards and to obtain testing documentation, product must be ordered to US...

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SELF-LOCKING FASTENERS TYPES LK/LKS/LKA 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 of PEMFLEX® locknuts provides increased pull-through performance and a positive stop...

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SELF-LOCKING FASTENERS TYPES PL AND PLC The thread locking torque performance of Type PL and PLC PEMHEX® self-clinching fasteners 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. Nylon locking element (blue identifier* for unified fasteners / black identifies metric fasteners) PART NUMBER DESIGNATION Type Material Code Thread Code Finish Code Clinching profile may vary. All dimensions are in inches....

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SELF-LOCKING FASTENERS TRI-DENT® LOCKNUTS - TYPE SL™ Type SL locknuts meet 3 cycle locking performance 80 or less and HB (Hardness Brinell) 150 or less. Recommended for use in sheets HRB (Rockwell “B” scale) PART NUMBER DESIGNATION E A Clinching profile may vary. Thread Code Shank Finish Code Code PEM TRI-DENT® Locking Feature. Locking feature appearance may vary. All dimensions are in inches. A Hole Size Min. Dist. Thread Type Thread Shank (Shank) Min. Sheet In Sheet C E T Hole C/L Size Code Code Max. Thickness –.000 +.003 Max. ±.010 ±.010 To Edge 1 .038 .040 2 .054 .056 Thread Code Thread...

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SELF-LOCKING FASTENERS MATERIAL AND FINISH SPECIFICATIONS Fastener Material Floating Fastener Internal, Locking Nylon Retainer Retainer Retainer Nut MIL-S-8879, Element Internal, Internal, UNJ-3B, or Black HeatBlue Type ASME ASME ANSI B1.21M, 300 Temperature Heat- treated 300 300 B1.1, 2B B1.1, 3B MJ 4H6H, Heat-treated Series (1) Limit treated 400 Series Series Series ASME ASME (4H5H Carbon Carbon Stainless 7075-T6 250˚ F/ Carbon Stainless Stainless Stainless B1.13M, 6H B1.13M, 6H M6 thread) Steel Steel Steel Aluminum 120˚ C Steel Steel Steel Steel CFN Optional Standard Finishes (2) (2)(3)...

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SELF-LOCKING FASTENERS INSTALLATION TYPE CFN 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 parallel, apply squeezing force until the shoulder of the fastener contacts the sheet. PUNCH SHEET PEMSERTER® Installation Tooling Thread Type Code Anvil Punch Part Part Number Number TYPES FE/FEO/UL 1. Prepare properly sized mounting hole in sheet....

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