MF FASTENER INDUSTRIES LLC
Emirates Modern Industrial Area, Umm Al Quwain, U.A.E. · P.O. Box 7071 · ISO 9001:2015 · Technical Library
TECHNICAL LIBRARY
Bolt Lab
Short animated explainers on how fasteners actually behave — the thread, the coating, the preload, the concrete — made by the people who make them. Each one shows the mechanism, names the standard, and tells you what to check. None of it is a design value; all of it is what we wish every customer knew before they ordered. Companion to Build Your Bolt.
In the lab now
01
Galvanizing & thread fit
Why hot-dip galvanized nuts are tapped oversize, what a standard nut does on a coated bolt, and why an oversize nut must never go on a bare one.
Animated · 4 steps · ISO 10684 · ISO 1461
02
Torque is not preload
Where the torque on your wrench actually goes, and why the same number gives a different clamp load on every finish.
Animated · 4 steps · T = K × F × d
03
Head markings chart
Click a head and read the grade, the standard, the mechanical properties and the nut that belongs with it.
Interactive · 15 grades · ISO · SAE · ASTM
04
How anchor bolts fail
Steel failure, concrete cone breakout and pull-out, side by side — and what the plate washer is really doing down there.
Animated · 4 steps · ACI 318 Ch.17 · EN 1992-4
05
Coating life in the Gulf
Zinc is consumed, not permanent. Pick your environment and coating and see the years to first maintenance.
Animated · interactive · ISO 12944-2 · ISO 1461
06
The flange tightening sequence
The star pattern, the graduated passes, and the circular passes everyone skips. Any bolt count, stepped or animated.
Animated · interactive · ASME PCC-1 Appendix F
07
Why bolts loosen under vibration
The Junker test: the joint slides, the nut ratchets back, the clamp load falls. Compare what actually holds.
Animated · interactive · DIN 65151 · ISO 16130
08
How much thread is enough
Set the engagement, load the bolt, and see whether it breaks or the thread strips. Steel, cast iron, aluminium, plastic.
Interactive · ASME B1.13M · FED-STD-H28
09
How to read a test certificate
Click each field of a sample EN 10204 3.1 certificate: what it means, what to check, and what a bad one looks like.
Interactive · EN 10204 · ISO 898-1
Next in the series: how a bolt is made.
How the lab works
Mechanism firstEvery explainer starts with a cross-section or a moving part, so you see the cause before you read the rule.
Standard namedEach page names the standard it rests on, with the clause or table where it matters, so you can check us.
What to ask forEvery page ends with the questions to put to your supplier — including us.
Not a design valueFigures shown are the standard's own limits or illustrative ranges. Joint design stays with the engineer of record.