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Simfix field journal Stainless fastener guides Built for better buying decisions

The Fix

Practical know-how for choosing stainless screws, bolts, nuts and washers with confidence.

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Guide graphic showing common stainless fastener head and drive types

Featured guide

Fastener Head and Drive Types: A Visual Glossary

Pan, countersunk, button, hex, socket, cup square - what each fastener head type looks like, what it's used for, and which drive bit fits.

Read the feature
01 Materials A2, A4 and corrosion choices 02 Standards DIN, ISO and BS explained 03 Marine A4 for coastal and salt exposure 04 Technical Heads, drives, sizing and specs

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Grade choice Should I use A2 or A4? Specification What does DIN or ISO mean? Pack size When should I buy bigger? Visual match Which head or drive is this?

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Every guide from The Fix.

All316a2a4beginnerboatsbulkbuying-guide
01 Guide graphic showing common stainless fastener head and drive types

beginnerfastenersglossary

Fastener Head and Drive Types: A Visual Glossary

Pan, countersunk, button, hex, socket, cup square - what each fastener head type looks like, what it's used for, and which drive bit fits.
Open guide
02 Simfix stainless steel hexagon head bolt manufactured to DIN, ISO and BS standards

dinfastenersiso

DIN, ISO and BS Standards Explained for Fasteners

What DIN, ISO and BS standards mean for fasteners, and why they matter. Quick reference to the most common standards on the shelves.
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