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Nuts

Nuts

Security Nuts

Sometimes the security is on the back of the bolt, not the head. Security nuts use the same tamper-resistant drive shapes as security screws - Tri-Wing, Spanner two-hole, Pin Hex - applied to a hex-or-other-form nut body. Shear and breakaway nuts go further: a sacrificial driver section snaps off at a designed torque, leaving a smooth dome that can't be re-gripped.

Sizes & Types

Thread sizes: M6 through M20. Types: Tri-Wing nuts (M6-M12), Spanner / Two-Hole nuts (M6-M16), Pin Hex nuts (M8-M16), Shear nuts (M8-M16, breakaway at designed torque), Breakaway studs with shear-cap nuts. Finish: Stainless A2-70 G304.

Recommended Use

Pair with a standard bolt of matching size and thread. The nut provides the security; the bolt does not need to be a security-drive type if the head sits in a recess that hides it from tampering. For maximum security use a security screw head AND a security nut - attacker has to defeat both.

Browse the full BNA range at Security Fasteners or see our Technical PDFs library for matching-bit guides and spec sheets.

Why Australia Trusts Bolt & Nut

98.75% of orders ship the same business day when placed before 1pm AEST. We've been online since 2011, carry 25,000 stock lines and over 200 million pieces ex-stock in Brisbane QLD, and offer up to 13 price breaks plus 3 spend-tier discounts. See our verified customer reviews on REVIEWS.io.

Barrel Nut
Shear Nut
Slab Tee Nut

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