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All Metal Lock Nut

All Metal Lock Nut
Not sure what nut you have?
Two ways to identify it - whichever is easier with what is in front of you.
1If you have the 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.

Open the nut identification chart ›

2If you have its bolt

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.

Open the bolt and screw guide ›

MATERIALS AND FINISHES

Available finishes: Stainless Steel.

GRADES, SIZES AND THREADS

Grades stocked: A2-70 G304, A4-70 G316.

Sizes: M12 (12mm), M10 (10mm), M4 (4mm), M5 (5mm), M6 (6mm), M8 (8mm), M16 (16mm), M20 (20mm).

Thread systems: Metric - Coarse, Metric - Fine.

STANDARDS

DIN 980.

These all metal 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.

View as Grid List

19 Items found

Set Descending Direction
per page

Hex all-metal lock nuts use distorted upper threads (no nylon insert) to grip the mating bolt and resist back-off. Effective under extreme temperature, chemical exposure, weld spatter and conditions where a nylon insert would fail. We stock 20+ variants across the all metal 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 - All Metal Lock Nut Metric Coarse Stainless G304 DIN 980 · Specs - All Metal Lock Nut Metric Coarse Stainless G316 DIN 980

For full sizing data and standards, see our Technical PDFs library.

Filter by :
Filter By
Category
System of Measurement
  1. Metric 19 items
Size
  1. M4 (4mm) 2 items
  2. M5 (5mm) 2 items
  3. M6 (6mm) 2 items
  4. M8 (8mm) 2 items
  5. M10 (10mm) 3 items
  6. M12 (12mm) 3 items
  7. M16 (16mm) 2 items
  8. M20 (20mm) 2 items
  9. M24 (24mm) 1 item
Size & Thread Pitch
  1. M4 x 0.70p Coarse 2 items
  2. M5 x 0.80p Coarse 2 items
  3. M6 x 1.00p Coarse 2 items
  4. M8 x 1.25p Coarse 2 items
  5. M10 x 1.25p Fine 1 item
  6. M10 x 1.50p Coarse 2 items
  7. M12 x 1.25p Extra Fine 1 item
  8. M12 x 1.75p Coarse 2 items
  9. M16 x 2.00p Coarse 2 items
  10. M20 x 2.50p Coarse 2 items
  11. M24 x 3.00p Coarse 1 item
Material / Finish
  1. Stainless Steel 19 items
Class / Grade
  1. A2-70 G304 11 items
  2. A4-70 G316 8 items
Corrosion Protection Level
  1. Ultimate 8 items
  2. Excellent 11 items
Overall Nut Height Range Guide
  1. 3.90 - 4.20mm 2 items
  2. 4.90 - 5.20mm 2 items
  3. 5.30 - 5.60mm 2 items
  4. 6.80 - 7.10mm 2 items
  5. 8.40 - 8.70mm 3 items
  6. 10.20 - 10.50mm 3 items
  7. 14.50 - 14.80mm 2 items
  8. 17.20 - 17.50mm 2 items
  9. 21.50 - 22.50mm 1 item
Spanner Size
  1. 7mm 2 items
  2. 8mm 2 items
  3. 10mm 2 items
  4. 13mm 2 items
  5. 17mm 3 items
  6. 19mm 3 items
  7. 24mm 2 items
  8. 30mm 2 items
  9. 36mm 1 item
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