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K-Lock Nut
Find the spanner that fits it snugly, then measure the hole. Our nut identification chart lists every metric and imperial nut we stock side by side, sorted by spanner size.
The fastest check is the male thread: the right nut spins onto its bolt by hand with no force. Identify the bolt size and pitch first with our bolt and screw guide, and the nut follows.
MATERIALS AND FINISHES
Available finishes: Zinc Silver Plated.
GRADES, SIZES AND THREADS
Grades stocked: Low Tensile Class 5.
Sizes: M5 (5mm), M6 (6mm).
Thread systems: Metric - Coarse.
STANDARDS
DIN 934K.
These k-lock nuts pair with our bolts, washers and threaded rod. See our Technical Resources page for tightening torques and spec PDFs.
WHY AUSTRALIA TRUSTS BOLT & NUT
With 15+ years selling fasteners online from Brisbane, we hold over 25,000 stock lines and 200 million pieces — 98.75% of online orders placed before 1pm leave same day. Save more as you buy more — we offer up to 13 price breaks plus 3 spend-tier discounts. Read our customer reviews or get in touch if you need help picking the right product.
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In stock
M5 x 0.80p Metric Coarse Zinc Class 5 Hex K-Lock Nut & Tooth Lock Washer DIN 934KAs low as $0.060 each -
Free shipping
In stock
M6 x 1.00p Metric Coarse Zinc Class 5 Hex K-Lock Nut & Tooth Lock Washer DIN 934KAs low as $0.068 each
K-Lock nuts are a one-piece assembly of a hex nut and an external tooth lock washer. The teeth bite into the bearing surface as the nut tightens, providing immediate locking action without the time and cost of fitting a separate washer. Saves assembly time and ensures the washer is never forgotten on the line. We stock 2+ variants across the k-lock nut range.
TECHNICAL RESOURCES
Need help identifying your nut? See our guide to identifying the size of your nut.
Key charts and specification sheets: Specs - K-Lock Nut Metric Coarse Zinc Silver DIN934K
For full sizing data and standards, see our Technical PDFs library.
