Engineering calculator
Fastener Engineering Calculators
Bench-side calculators for metric fasteners. Inputs validate as you type; results are computed from the published standards (ISO 261, 273, 4014/4017, 4032, 7089/7093, 898-1, 3506).
Bolt Length Calculator
Given the clamp thickness, washer and nut, returns the next standard bolt length plus thread engagement and projection.
Loading calculator…
Matching parts on engineeringhardware.com
Thread Engagement Calculator
Minimum thread engagement length when threading a steel screw into a softer (or equal) parent material, based on the simplified ASME B1.1 / FED-STD-H28 approach.
Loading calculator…
Matching parts on engineeringhardware.com
Tightening Torque Calculator
Indicative tightening torque for a metric bolt using T = K · F · d, with friction coefficient picked from common surface / lubrication conditions.
Loading calculator…
Matching parts on engineeringhardware.com
Tap Drill & Clearance Hole Calculator
Tap-drill diameter for cutting an internal thread (ISO coarse, 75% engagement by default) and the matching ISO 273 clearance holes (close / medium / coarse).
Loading calculator…
Matching parts on engineeringhardware.com
Washer Size Selector
Standard ISO 7089 and ISO 7093 (large) flat washer dimensions for a given bolt size.
Loading calculator…
Matching parts on engineeringhardware.com
Bolt Pattern (PCD) Calculator
For a given pitch circle diameter and number of bolts, returns the chord length between adjacent bolts and the X/Y coordinates of each hole.
Loading calculator…
Matching parts on engineeringhardware.com
Pitch ↔ TPI Converter
Converts between metric pitch (mm) and imperial threads-per-inch.
Loading calculator…
Matching parts on engineeringhardware.com
Metric ↔ Imperial Converter
Bench-side unit converter for length, torque, force and pressure.
Loading calculator…