Consolidated Tech Man - Holo-Krome

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48 APPENDIX GENERAL APPLICATION DATA Page GLOSSARY OF TERMS ..............................................................................49 TAPPING INFORMATION ............................................................................51 FASTENER JOINT DESIGN ........................................................................52 FASTENER STRENGTHS ...........................................................................53 HARDNESS CONVERSIONS ......................................................................55 EFFECTS OF ALLOYING ELEMENTS ........................................................56
GLOSSARY OF TERMS Tensile Strength - Force or stress required to break a fastener when pulled in straight tension. When expressed as a force, lbs., it applies to a specific size part. Expressed as a stress, psi, means the force is applied over a specific area and it could apply to a range of sizes. For example, socket screws from #0 to 1/2 inch can withstand an applied stress of 180,000 psi. Stress Area - Theoretical area in the thread section of a fastener over which the load is applied. Yield Strength - This is the measure of the resistance of a material to plastic (permanent) deformation. It is usually at a point of 0.2% permanent strain. Torsion - Twisting force applied to a fastener during tightening. Elongation - longitudinal stretching of a fastener caused by a tensile load due either to tightening or to the external load. Shear Strength - the resistance of a fastener to transverse loading. This type of load should only be applied to a dowel pin or the unthreaded section of a screw. Rockwell Hardness - One method of measuring hardness of a metal, generally related to the material tensile strength. Normally stated as “C” scale readings, but may be taken as “A”, 30N or 15N scale readings when limited penetration is desired. Limited penetration is required when checking case hardness or thin parts. Creep Strength - At elevated temperatures metal under stress elongates. This elongation increases with time and temperature. To prevent failure it is often necessary to change to heat resistant materials. Fatigue Strength - Under variations in applied stress a fastener feels internal stretching that can cause rupture after a specific number of cycles. The number of cycles to failure for a specific load is the fatigue life of the screw. In rigid assemblies preloading above the external load should eliminate fatigue failure. 49
Page 1 and 2: Technical Handbook 1
Page 3 and 4: ii THE HOLO-KROME QUALITY STORY Qua
Page 5 and 6: TABLE OF CONTENTS DIMENSIONAL DATA
Page 7 and 8: Intentionally Left Blank 7
Page 9 and 10: NOTES FOR TABLE 1 CONTINUED 2. THRE
Page 11 and 12: TABLE 9 HOLO-KROME SOCKET FLAT COUN
Page 13 and 14: TABLE 11 HOLO-KROME HEXAGON AND SPL
Page 15 and 16: HOLO-KROME SOCKET HEAD SHOULDER SCR
Page 17 and 18: HOLO-KROME SOCKET SET SCREWS TABLE
Page 19 and 20: TABLE 15 HOLO-KROME DOWEL PINS TABL
Page 21 and 22: TABLE 18 ALLEN SPLINE KEYS AND BITS
Page 23 and 24: TABLE 20 HOLO-KROME SOCKET PRESSURE
Page 25 and 26: TABLE 23 HOLO-KROME THREAD STANDARD
Page 27 and 28: MECHANICAL PROPERTIES AND APPLICATI
Page 29 and 30: WHY USE A SOCKET SCREW, INSTEAD OF
Page 31 and 32: TABLE 25 HOLO-KROME MECHANICAL PROP
Page 33 and 34: TABLE 27 DECARBURIZATION AND DISCON
Page 35 and 36: TABLE 29 HOLO-KROME BUTTON HEAD AND
Page 37 and 38: HOLO-KROME SOCKET SET SCREWS — AL
Page 39 and 40: The torsional holding power of the
Page 41 and 42: TABLE 33 HOLO-KROME PRESSURE PLUGS
Page 43 and 44: TABLE 34 HOLO-KROME DOWEL PINS MECH
Page 45 and 46: HOLO-KROME NYLOK ® * HEX-SOCKET SC
Page 47: TABLE 35 (continued) MILITARY MIL-P
Page 51 and 52: TAPPING HINTS There are two basic f
Page 53 and 54: TABLE A2 FASTENER STRENGTHS Fastene
Page 55 and 56: TABLE A6 HARDNESS VALUE CONVERSIONS
Page 57 and 58: METRIC FASTENERS 57
Page 59 and 60: Metric Section Index to Tables Page
Page 61 and 62: TABLE 36 HOLO-KROME METRIC SOCKET H
Page 63 and 64: TABLE 38 HOLO-KROME METRIC SOCKET H
Page 65 and 66: TABLE 40 HOLO-KROME METRIC HEXAGON
Page 67 and 68: TABLE 42 BODY AND GRIP LENGTHS HEXA
Page 69 and 70: NOTES FOR TABLE 43 (SHOULDER SCREWS
Page 71 and 72: TABLE 45 DIMENSIONS OF METRIC SOCKE
Page 73 and 74: TABLE 46 and 47 METRIC HEXAGON AND
Page 75 and 76: TABLE 49 METRIC ALLEN SPLINE KEYS A
Page 77 and 78: TABLE 51 HOLO-KROME METRIC SCREW TH
Page 79 and 80: 79 SIZE DIAMETER (IN.) TPI SIZE DIA
Page 81 and 82: MECHANICAL PROPERTIES AND APPLICATI
Page 83 and 84: TABLE 55 METRIC SOCKET HEAD CAP SCR
Page 85 and 86: TABLE 57 HOLO-KROME STAINLESS STEEL
Page 87 and 88: TABLE 60 HOLO-KROME METRIC SHOULDER
Page 89 and 90: TABLE 62 METRIC ALLEN WRENCHES AND
Page 91 and 92: TABLE 64 METRIC FASTENER RELATED ST

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