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WESTCOASTLOCKWASHER,16730EastJohnsonDrive,P.O.Box3588Industry,California91744••Phone[phone]•Fax[phone]HI-LO®FASTENERSSCREWSFORPLASTICANDOTHERLOWDENSITYMATERIALSINCREASEDPULL-OUTSTRENGTH#8TYPEBSCREW#8HI-LOFASTENERTheHi-Loscrewthreadconfigurationhasasmallerminordiameterthanacon-ventionalscrew.Thehighthreadsmakeadeepercutintothematerialbetweenthethreads.Thereisalsoagreateramountofmaterialincontactwiththehigh,sharpthreadandtheaxialshearareaisincreased.Allofthiscontributestogreaterresistancetopulloutandstrongerfastening.LOWERDRIVING,HIGHERSTRIPPINGTORQUESAXIALSHEARMATERIALTYPEBTHREADHI-LOTHREADThe30°includedangleofthehighthreaddisplaceslessmaterialwhenitisdrivenintoplasticorwoodand,there-fore,requireslowerdrivingtorques.Agreateramountofmaterialremainsbetweenthehighthreads,increasingthestrippingtorque.Lowdrivingtorqueandhighstrippingtorqueprovidemaxi-mumprotectionagainststrippingprob-lems.TheHi-Lofastener,withitsuniquethreadform,improvesfastenerperformanceinabroadrangeoflowdensitymate-rialssuchasplastics,wood,masoniteandparticleboard.Thisfastenerisdesignedwithadoublelead,consistingofahighandalowthread.Thehighthreadissharperthanaconventionalthread,havinga30°includedangle.Thelowthreadhasthe60°includedangleandaheightthatis40%to50%ofthehighthreadheight.THEHIGHPERFORMANCEFASTENERFORPLASTICS,PARTICLEBOARD,MASONITEANDWOODThesuperiorperformanceoftheHi-Lofastenerincreasesproductqualityanddecreasescosts.The30°includedangleofthehighthreadformreducesradialorburstingpressuretoone-halfofthatgener-atedbytheconventional60°includedanglethreadform.Bosscrackinginplasticisdramaticallyreducedandsmallerdiameterbossescanoftenbespecified.Inwoodapplications,evenwhendrivingclosetotheedge,splittingisgreatlyreducedduetothislowerradialpressure.REDUCEDCRACKING,SPLITTINGANDBOSSBREAKAGESCREWSIZE27111/4345681012139/32HEADMAX..167.193.219.254.270.322.373.425.492DIAMETERMIN..155.180.205.240.258.306.357.407.473HEADMAX..062.071.080.097.097.115.133.151.175HEIGHTMIN..053.062.070.087.087.105.122.139.162PENETRATIONGAGINGMAX..052.061.071.072.080.097.113.124.144DEPTHMIN..034.043.053.046.055.071.089.098.118PHILLIPSPANHEADDIMENSIONSININCHES1/4SCREWSIZE235710129/3246811135/16WASHERMAX..167.177.260.328.348.432.520DIAMETERMIN..154.163.240.302.322.396.480ACROSSCORNERSMIN..134.134.202.272.272.340.409ACROSSMAX..125.125.187.250.250.312.375FLATSMIN..120.120.181.244.244.305.367HEADMAX..050.055.070.093.110.155.190HEIGHTMIN..040.044.058.080.096.139.172WASHERMAX..016.016.025.025.031.039.050THICKNESSMIN..010.010.015.015.019.022.030LGFHMSCREWSIZE3-284-245-206-197-198-1810-1611-1612-1613-161/4-155/16-14HIGHTHREADDIAMETER(D)MAX.MIN..105.095.115.105.125.119.145.135.158.148.170.160.195.185.210.198.220.210.230.220.260.250.317.307LOWTHREADDIAMETER(P).078.086.100.108.030.130.145.150.176.180.200.250POINTDIAMETER(d).061.066.078.085.095.100.105.119.131.133.168.206RECOMMENDEDPILOTHOLEDIAMETER*.078.086.099.108.125.128.144.150.166.180.200.250*Theseholesizesaretentativeandareprovidedasaguideonly.Actualholesizecouldvarydependingontypeofplastic,bossdiameterandlengthofthreadengagement.HI-LOFASTENERSDIMENSIONSININCHESINDENTEDHEXWASHERHEADDIMENSIONSININCHESHI-LOFASTENERSHEXWASHERHEADPHILLIPSPANHEADHI-LOFASTENERSPECIFICATIONSMINORDIA.MAJORDIA.MINORDIA.LARGERSHEARAREAGHLGFMHTGHTPage16Note:Hi-LoisaregisteredtrademarkofIllinoisToolWorksIncorporated.