The fastener reference

Every table here is computed from the standard's own formulas, every guide is written by people who make and test fasteners, and every page says plainly what it is for and what it is not. Bookmark it. Come back when the drawing is unclear.

Reference tools

Thread & dimensions

Pitch, stress area, tap drill, across-flats, head and nut heights — metric and inch.

DIN · ISO · ASTM

Which standard is which, and which grade is which, across the three systems on Gulf drawings.

Bolt length

Grip, washers, nut and projection → the standard length that fits, with a thread-reach check.

Torque & preload

A printable table for every size in the grade and finish you are tightening.

Weight & quantity

Kilograms per hundred, carton and pallet estimates for purchasing and logistics.

Coating selector

The right finish for Gulf coast, industrial and immersion service — with galvanic warnings.

Grade & load

Which grade carries the load — proof, tensile and shear for every class.

Build your bolt

Draw the anchor bolt to your dimensions and send it as your enquiry.

Recently added

What changed in the library, newest first

NEW · Technical library — six reference tools, product knowledge and guides

NEW · Failure modes guide — six mechanisms with prevention

NEW · Bolt Grade & Load Calculator (live)

NEW · Build Your Bolt configurator (live)

Ask an engineer

If the answer is not in the library, ask. Good questions become new entries.

Technical bulletin

One short email a month: a standard revision, a site mistake we keep seeing, a new table. No marketing.