Socket Products Engineering Guide - Industrial and Bearing Supplies

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FLAT HEAD AND BUTTON HEAD SOCKET SCREWSMechanical PropertiesNOTESMaterial: ASTM F835 – alloy steelASTM F879 – stainlessHardness: Rc 38–43 for alloy steelRb 96–Rc 33 for stainless steelTensile Strength: 160,000 PSI min. ultimate tensile strength for alloy steel90,000 PSI min. ultimate tensile strength for stainless steelHeat Treatment: Stainless steel is in cold-worked (CW) condition unlessotherwise requested.GENERAL NOTEFlat, countersunk head cap screws and button head cap screws are designedand recommended for moderate fastening applications: machine guards,hinges, covers, etc. They are not suggested for use in critical high strengthapplications where socket head cap screws should be used.MECHANICAL PROPERTIES16ALLOY STEELSTAINLESS STEELultimateseating torqueultimate tensileseating torquesingle shearsingle shearnom.strength lbs.inch-lbs.*strength lbs.inch-lbs.*strength ofstrength ofsize UNRC UNRF body lbs. min. UNRC UNRF UNRC UNRF body lbs. min. UNRC UNRF#0 – 265 271 – 1.5 – 162 93 – 1.0#1 390 390 402 2.5 2.5 237 250 137 1.7 1.8#2 555 555 556 4.5 4.5 333 355 191 2.8 3.0#3 725 725 739 7 7 438 471 253 4.3 4.6#4 1,040 1,040 946 8 8 544 595 325 6.0 6.6#5 1,260 1,310 1,180 12 13 716 747 403 8.9 9.3#6 1,440 1,620 1,440 15 17 818 913 491 11 12#8 2,220 2,240 2,030 30 31 1,260 1,327 693 20 21#10 2,780 3,180 2,770 40 45 1,575 1,800 931 30 341/4 5,070 5,790 4,710 100 110 2,862 3,276 1,610 71 815/16 8,350 9,250 7,360 200 220 4,716 5,220 2,520 123 1363/8 12,400 14,000 10,600 350 400 6,975 7,900 3,620 218 2477/16 16,900 18,900 14,400 560 625 9,570 10,680 4,930 349 3881/2 22,800 25,600 18,850 850 1,000 12,770 14,390 6,440 532 6009/16 28,900 32,300 23,900 1,200 1,360 16,300 18,300 8,150 767 8565/8 36,000 40,800 29,450 1,700 1,900 20,300 23,000 10,100 1,060 1,2003/4 53,200 59,300 42,400 3,000 3,200 30,100 33,600 14,500 1,880 2,1007/8 73,500 81,000 57,700 5,000 5,400 41,500 45,800 19,700 3,030 3,3401 96,300 106,000 75,400 7,200 7,600 54,500 59,700 25,800 4,550 5,000*Torques values listed are for plain screws to induce 65,000 psi stress in alloy steel and 30,000 psi tensile stress in stainless steel screwthreads. For cadmium plated screws, multiply recommended seating torque by .75; for zinc plated screws multiply by 1.40.See Note, page 1.
SQUARE HEAD SET SCREWSDimensions Application DataHeat treated alloy steel formaximum strength withoutbrittleness or decarburizationFully formed threads with continuousgrain flow for greater strengthand precision fitKnurled cup point for positiveself-locking and vibration resistanceThreads per ANSI B 1.1;Handbook H-28. ANSI B18.6.2VIBRATIONAL HOLDING POWERvs. SEATING TORQUESize: 5/16”–18x1/2”GREATER TIGHTENING TORQUESof UNBRAKO Square Heads,made of high quality alloy steel,provide 50% more axial holdingpower than ordinary carbon steelsquare heads. And, because ofthe increased torque plus theKnurled Cup Point, UNBRAKOSquare Head Set Screws deliverup to 400 percent moreVibrational Holding Power.Seconds1000800600400VIBRATIONAL HOLDING POWER (Endurance)400% moreVibrationalHolding PowerUNBRAKOALLOY STEELSQUARE HEADS200CARBON STEELSQUARE HEADS(Plain Cup Point)0SEATING TORQUE (Inch Lbs.)100 200 300 400DIMENSIONS and APPLICATION DATASELF-LOCKING KNURLED CUP POINTINTERNAL OR EXTERNAL KNURLFURNISHED AT UNBRAKO OPTIONNOTESMaterial: ASTM A574 – alloy steelHeat treatment: Rc 45 min., through heat treatedThread: Class 2A.These torques are appreciably higher than socket set screw torquevalues, therefore thread stripping strength of mating materialmust be considered.basic threads A C D F H R W recom.**nom. screw per torquesize diameter inch min. max. min. max. min. ±.010 max. min. nom. max. min. inch-lbs.#10 .190 24 .247* .102 .88 .127 .120 .045 .148 .134* 31/64 .188 .180 1001/4 .250 20 .331 .132 .118 .156 .149 .063 .196 .178 5/8 .250 .241 2125/16 .312 18 .415 .172 .156 .203 .195 .078 .245 .224 25/32 .312 .302 4203/8 .375 16 .497 .212 .194 .250 .241 .094 .293 .270 15/16 .375 .362 8307/16 .437 14 .581 .252 .232 .297 .287 .109 .341 .315 1 3/32 .437 .423 1,3501/2 .500 13 .665 .291 .270 .344 .334 .125 .389 .361 1 1/4 .500 .484 2,1009/16 .562 12 .648 .332 .309 .391 .379 .140 .437 .407 1 13/32 .562 .545 2,8505/8 .652 11 .833 .371 .347 .469 .456 .156 .485 .452 1 9/16 .625 .606 4,2503/4 .750 10 1.001 .450 .425 .563 .549 .188 .582 .544 1 7/8 .750 .729 7,7007/8 .875 9 1.170 .530 .502 .656 .642 .219 .678 .635 2 3/16 .875 .852 12,6001 1.000 8 1.337 .609 .579 .750 .734 .250 .774 .726 2 1/2 1.000 .974 16,6001 1/8 1.125 7 1.505 .689 .655 .844 .826 .281 .870 .817 2 13/16 1.125 1.096 20,8001 1/4 1.250 7 1.674 .767 .733 .938 .920 .312 .966 .908 3 1/8 1.250 1.219 25,0001 3/8 1.375 6 1.843 .848 .808 1.031 1.011 .344 1.063 1.000 3 7/16 1.375 1.342 32,0001 1/2 1.500 6 2.010 .926 .886 1.125 1.105 .375 1.159 1.091 3 3/4 1.500 1.464 44,000*#10 may have head dimensions from 1/4 nominal size furnished at Unbrako option. **See Note, page 1.LENGTH TOLERANCEup to 1” 1” to 2” 2” andDiameter incl. incl. overup to 5/8” –.03 –.06 –.093/4” and over –.06 –.12 –.1817
Page 1 and 2: Engineering GuideSocket Products
Page 3 and 4: TABLE OF CONTENTSUNBRAKO ® Socket
Page 5 and 6: INCH QUICK SELECTOR GUIDEPERFORMANC
Page 7 and 8: SOCKET HEAD CAP SCREWSWhy Socket Sc
Page 9 and 10: SOCKET HEAD CAP SCREWS1960 Series
Page 11 and 12: SOCKET HEAD CAP SCREWS1960 Series
Page 13 and 14: LOW HEAD CAP SCREWSSOCKET HEAD CAP
Page 15 and 16: SHOULDER SCREWSDimensions Mechanic
Page 17: BUTTON HEAD CAP SCREWSDimensionsPre
Page 21 and 22: SOCKET SET SCREWSDimensions Applic
Page 23 and 24: SOCKET SET SCREWSPoint Selection Ac
Page 25 and 26: SOCKET SET SCREWSTorsional and Axia
Page 27 and 28: PRESSURE PLUGSLEVL SEAL ® TYPE Dry
Page 29 and 30: PRESSURE PLUGSPTFE/TEFLON-Coated LE
Page 31 and 32: DOWEL PINSDimensions Application D
Page 33 and 34: PULL-OUT DOWEL PINSDimensions Appl
Page 35 and 36: HEXAGON KEYSWhy UNBRAKO keys tighte
Page 37 and 38: TABLE OF CONTENTSUNBRAKO ® Socket
Page 39 and 40: A WARNING TO METRIC FASTENER USERSM
Page 41 and 42: SOCKET HEAD CAP SCREWS Metric Bod
Page 43 and 44: METRIC SOCKET BUTTON HEAD CAP SCREW
Page 45 and 46: METRIC DOWEL PINSHardened and Groun
Page 47 and 48: METRIC SOCKET SET SCREWFlat Point,
Page 49 and 50: METRIC HEXAGON KEYSDimensions Mech
Page 51 and 52: ISO TOLERANCESTolerances for Metric
Page 53 and 54: TABLE OF CONTENTSTechnical SectionP
Page 55 and 56: SCREW FASTENER THEORY & APPLICATION
Page 57 and 58: SCREW FASTENER THEORY & APPLICATION
Page 59 and 60: JOINT DIAGRAMSSpring ConstantsTo co
Page 61 and 62: JOINT DIAGRAMSF e2F e212nl jI j34F
Page 63 and 64: JOINT DIAGRAMSF eB = Φ F e must be
Page 65 and 66: THE TORQUE-TENSION RELATIONSHIPFig.
Page 67 and 68: STRIPPING STRENGTH OF TAPPED HOLEST
Page 69 and 70:
STRIPPING STRENGTH OF TAPPED HOLEST
Page 71 and 72:
HIGH-TEMPERATURE JOINTSF wF cF cF w
Page 73 and 74:
CORROSION IN THREADED FASTENERSAll
Page 75 and 76:
CORROSION IN THREADED FASTENERSFor
Page 77 and 78:
IMPACT PERFORMANCETHE IMPACT PERFOR
Page 79 and 80:
IMPACT PERFORMANCETYPICAL TENSION I
Page 81 and 82:
PRODUCT ENGINEERING BULLETINUNBRAKO
Page 83 and 84:
METRIC THREADSExample of thread tol
Page 85 and 86:
DRILL AND COUNTERBORE SIZESDRILL AN
Page 87 and 88:
THREAD STRESS AREASInch and MetricS
Page 89 and 90:
OPTIONAL PART NUMBERING SYSTEMPRESS
Page 91 and 92:
METRICHEX KEYS PART NUMBERS (METRIC
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Socket Products Engineering Guide - Industrial and Bearing Supplies

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