Fastener, Bolt and Screw Design Torque and Force Calculations
ISO Hardware Engineering Data
ANSI Hardware Engineering Data
Strength of Materials
 The following are to links of engineering resources, tools, articles and other useful data.
 Should you find any errors omissions broken links, please let us know  Feedback
 Do you want to contribute to this section? See Premium Publisher Program
The following design resources are for design screws and bolts for the proper torque, stress, strain, preload and other engineering critical design parameters.
Thread Stress Area Calculator and Equation
 Length of Screw Thread Engagement per. ISO 9651 Calculator, Formula and Table Length of engagement of mating threads is selected to utilize full tensile strength of a bolt prior to shearing and nut threads.
 Bolt Fastener Tightening Methods Review

Bolt Head or Nut Friction Torque Formula and Calculator per. MILHDBH60

Bolt Elongation Stress Formulas and Calculator per. MILHDBH60 Micrometer Bolt Elongation Method: Below the proportional limit. bolt elongation is directly proportional to axial stress, i.e., elongation increases in the same proportion as stress increases.
 Bolt Elongation by Turn Formulas and Calculator per. MILHDBH60

Bolt Torque on Assembly for Gasket Contact Stress per. ASME PCC1 Equations and Calculator
 Bolt Root and Tensile Stress Area Table for Metric and Inch Unit Threads
 Bolt Elongation Formula and Calculator per. ASME PCC1When bolt elongation (bolt stretch) measurement is selected as the loadcontrol technique to be used, the required bolt elongation is computed according to the following equation
 Bolt Threads, Grade, Bolt Strength, Excel Spreadsheet Calculator, Spreadsheet Calculated per the AISC Ninth Edition
 Bolt Pattern Group Pullout Excel Spreadsheet Calculator, Spreadsheet Calculator Calculated per the AISC Ninth Edition
 Bolt Preload Effects Due to Temperature Load Calculator and Equations
 Sheet / Plate Joints with Dissimilar Materials Loads Calculator and Equations
 Single Lap Joint with Dissimilar Materials Loads Calculator and Equations
 Engineering Fundamentals of Threaded Fastener Design and Analysis  Premium Membership Required
 Calculating Assembly Torque per ISO 68 & ISO 724
 Combined Thread and Body Bolt Elongation Under Preload Formula and Calculator With torque or turn on a bolt thread, we’re trying to control the tightening process through the forces applied to, or the motion of, the nut.
 Bolt Elongation Equation and Calculator while under Axial Stress
 Fastener Design Engineering Manual  Premium Membership Required
 Threaded Fastener Design and Analysis white Paper (39 page, detail engineering anaylsis of fastent torque and forces) Free Membership required
 Fastener Relation Between Torque, Thread Pitch and Clamping Force Formula and Calculator
 Fastener Relation Between Bolt Torque and Clamping Force Formula and Calculator per. JIS B 1083
 Metric M Series Thread Stress and Shear Areas
 Force Required to Strip the Bolt Threads Any Length Formula and Calculator
 Force Required to Strip the Bolt Threads Formula and Calculator
 ISO Stress Area Equation and Calculator  Proof load values are given in BS EN 208982:
 BS EN 208982 Proof load values  Coarse thread
 Moment Effect on the Bolts' Circular Distribution in the Endplate Connection
 Screw Gear Axial Force Calculation
 Force Required to Strip the Bolt Threads Formula and Calculator
 Thread Designations and Symbols AN
 Thread Designations and Symbols NZ
 Single Thread Tensile Stress Area Formula and Calculator Per. ASME B1.1
 Typical Elongation Chart for Common Bolting MaterialsThe amount of bolt stretch you want in your end ite design will, of course, be determined by the amount of preload you want in the fastener.
 Stress at Threaded Connections Between Two Tubes Design and Calculator
 ANSI, ISO Thread Designations and References
 Strength Specifications Steel Bolts
 Strength Grade Designation System of Steel Bolts and Screws
 UN External Screw Threads Formulas and Calculator
 Screw Threads Formula and Calculator for Internal Unified Inch UN Screw
 Thread Shear Area for External and Internal Formulas and Calculator per. ASME B1.1
Thread Pullout Stress and Force
Standard Thread Size Charts
Torque Clamp Force Calculator
 Stud Preload Calculator
 Bolt Preload Tension Equation and Calculator
 Bolt Preload Tension Force Calculator
 Torque vs Tension Bolts Table Chart SAE J429 Bolts
 Bolt Multiple Diameters Change of Length Under Axial Force Formula and Calculator
Torque Conversion
Torque Design Guidelines and Considerations
Torque Conversion
Torque Wrench Adapter Calculation
Special Applications
 Fasteners Comprehensive Technicians Guide
 Press Fit Engineering and Design Equations
 Press Fit Calculations and Equation
 Bolt or Pin In Single Shear Equation and Calculator
 Bolt or Pin In Double Shear Equation and Calculator
 SingleRiveted LapJoint Formulas for Stress and Strength Design Equations and Calculator
 SingleRiveted LapJoint with Inside Cover Plate Formulas and Calculator for Stress and Strength Design
 DoubleRiveted LapJoint with Inside Cover Plate Formulas and Calculator for Stress and Strength Design.
 Loading Capacities of Ordinary Bolts per. BS449: Part 2 Bolt Grade 4.6
 Loading Capacities of Ordinary Bolts per. BS449: Part 2 Bolt Grade 6.8
 Loading Capacities of Ordinary Bolts per. BS449: Part 2 Bolt Grade 8.8
 Excel Spreadheet Design Calculator per. BS: 449: Part 2 requires an active Premium Membership with Engineers Edge
 Class 5 InterferenceFit Threads Torques, Interferences, and Engagement Lengths
 Light Lamp Socket Threads Table Lamp Base and Socket Shell Threads. The “American Standard” threads for lamp base and socket shells are sponsored by the American Society of Mechanical Engineers, the National Electrical Manufacturers’ Association
 Spark Plug Threads Sizes and Tapped Hole Table

Thick Wall Cylinder Press or Shrink Fits Interference and Pressure Equations and Calculator If two thickwalled cylinders are assembled by either a hot/cold shrinking or a mechanical pressfit, a pressure is developed at the interface between the two cylinders.
 Interference Fit Force Required the Press Together Hub and Shaft Equations and Calculator