Socket Products Engineering Guide - Industrial and Bearing Supplies

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UNBRAKO Metric FastenersUNBRAKO Metric Fasteners arethe strongest off-the-shelf threadedfasteners you can buy. Theirexclusive design features andclosely controlled manufacturingprocesses insure the dimensionalaccuracy, strength and fatigueresistance needed for reliabilityin today’s advanced technology.They are manufactured with thesame methods and features astheir inch-series counterpart.StrengthUNBRAKO metric socket head capscrews are made into propertyclass 12.9 with a minimum ultimatetensile strength of 1300 or 1250MPa depending on screw diameter.Precision in manufacturingand careful control in stress areasinsure strength in such criticalareas as heads, sockets, threads,fillets, and bearing areas.When you purchase UNBRAKOmetric socket screw products, youcan be sure that they meet orexceed the strength levels of allcurrent standards, including thethree most common-ANSI, ISOand DIN. Unbrako is representedon several ASME, ANSI, ASTMand ISO committees. ANSI (American NationalStandards Institute) documentsare published by ASME (TheAmerican Society of MechanicalEngineers) and are familiar toalmost all users of socket screwproducts in the U.S.A. ASTM (American Society forTesting and Materials). ManyANSI documents list dimensionalinformation but referto ASTM specifications formaterials, mechanical properties,and test criteria. ISO (International StandardsOrganization) is a standardsgroup comprising 70 membernations. Its objective is toprovide standards that willbe completely universal andcommon to all countriessubscribing. DIN (Deutsche IndustriesNormen) is the Germanstandards group.NOTE: The proper tighteningof threaded fasteners can havea significant effect on theirperformance.36
A WARNING TO METRIC FASTENER USERSMetric socket cap screws are NOT sold in a single strength levellike U.S. inch socket screws.Property Class General Material Strength Level, UTS min. MPa (KSI)International Standards Organization, ISOProperty Class 8.8 Carbon Steel 800 (116) < M16830 (120) ≥ M16Property Class 10.9 Alloy Steel 1040 (151)Property Class 12.9 Alloy Steel 1220 (177)USA StandardsASTM A574M Alloy Steel 1220 (177)Unbrako StandardsASTM A574M Alloy Steel 1300 (189) ≤ M161250 (181) > M16STANDARDSThe use of metric fasteners in the worldwide market has led to the creation of many standards. Thesestandards specify the fastener requirements: dimensions, material, strength levels, inspection, etc. Differentstandards are the responsibility of various organizations and are not always identical. Unbrako supplies metricfasteners for maximum interchangeability with all standards. This Engineering Guide was published with themost current values, which are however subject to change by any standards organization at any time.37
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 and 18: BUTTON HEAD CAP SCREWSDimensionsPre
Page 19 and 20: SQUARE HEAD SET SCREWSDimensions A
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: TABLE OF CONTENTSUNBRAKO ® Socket
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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