Free engineering tools from HAGUE FASTENERS LIMITED, the UK manufacturer of special fasteners since 1971. Each tool has its own page, so you can bookmark the ones you use. All are free, need no sign-up and work on a phone.
Our engineering tools
Hardness converter
Convert Rockwell C, Rockwell B, Vickers and Brinell hardness, with approximate tensile strength in MPa, ksi and tons per square inch. Open the hardness converter.
Stud bolt weight calculator
Weigh imperial and metric stud bolts and nuts, for one stud or a whole order, in kilograms and pounds. Open the stud bolt weight calculator.
Bar weight calculator
Work out the weight of round, square and hexagon bar and plate per metre, per piece and per order, in mm or inches, kilograms and pounds. Open the bar weight calculator.
Tensile strength converter
Convert stress, force and torque between metric, imperial and older British units. Open the tensile strength converter.
Material equivalents finder
Enter an EN number, UNS, ASTM, BS or trade name, such as 1.4462, and see the comparable grades in other standards, with the bolting grades for fasteners. Open the material equivalents finder.
Bolt torque calculator
Work out tightening torque and preload for metric, UNC, UNF, BSW and BSF threads in property classes, B7, B16, L7, stainless and nickel alloys. Open the bolt torque calculator.
Thread size chart and identifier
Pitch, diameters, stress area and tapping drill for metric, UNC, UNF, BSW, BSF, BA and BSP threads, and identify an unknown thread from measurements. Open the thread size chart and identifier.
Galvanic corrosion checker
Choose a fastener material and the metal it fastens to see which corrodes, the risk in your environment and how to reduce it. Open the galvanic corrosion checker.
Why we built these engineering tools
Our customers in nuclear, defence, oil and gas and power ask us the same questions every week: what a hardness reading means in another scale, how much a batch of studs will weigh for shipping, or what an old drawing in tons per square inch means in MPa. These engineering tools answer those questions in seconds, using the same standards we work to in our own works in Willenhall, West Midlands.
Each tool is built and checked by HAGUE FASTENERS LIMITED, a family-owned manufacturer of special bolts, studs, nuts and machined parts. We add new tools regularly, so bookmark this page and check back.
Every tool shows its working basis and its limits, so you know when a result can be relied on and when you should go back to the standard or ask us.
Coming soon
- Flange bolting finder (ASME B16.5)
- Property class and grade lookup
- Bar weight calculator
Guidance only. Results are approximate and for initial guidance. Always check critical values against the governing standard, specification or drawing.
Need special fasteners made to drawing, sample or specification? Send us an enquiry or call +44 (0)1902 365 865.