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M8 x 1.25p Metric Coarse Mechancial Galvanised Class 6 Hex Nyloc Nuts High Tensile DIN 985
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| Price for each item | Subtotal | % savings | ||
| Buy 1 | Buy 1 | $5.80 each | $5.80 | - |
| Buy 2 + | Buy 2 - 4 | $3.20 each | $6.40 | 44.83% |
| Buy 5 + | Buy 5 - 9 | $1.40 each | $7.00 | 56.25% |
| Buy 10 + | Buy 10 - 19 | $0.80 each | $8.00 | 42.86% |
| Buy 20 + | Buy 20 - 29 | $0.45 each | $9.00 | 43.75% |
| Buy 30 + | Buy 30 - 49 | $0.34 each | $10.20 | 24.44% |
| Buy 50 + | Buy 50 - 74 | $0.22 each | $11.00 | 35.29% |
| Buy 75 + | Buy 75 - 99 | $0.20 each | $15.00 | 9.09% |
| Buy 100 + | Buy 100 - 199 | $0.18 each | $18.00 | 10.00% |
| Buy 200 + | Buy 200 - 499 | $0.16 each | $32.00 | 11.11% |
| Buy 500 + | Buy 500 - 999 | $0.14 each | $70.00 | 12.50% |
| Buy 1000 + | Buy 1000 - 1999 | $0.12 each | $120.00 | 14.29% |
| Buy 2000 + | Buy 2000 - 4999 | $0.10 each | $200.00 | 16.67% |
| Buy 5000 + | Buy 5000 + | $0.09 each | $450.00 | 10.00% |
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In Stock
Other Sizes in Range
Delivery Information
Orders under $30 (Bulky items sent as parcel for FREE)
- Aust Post UNTRACKED Letter – FREE
- Parcel – From $8
- Express – From $10
- Click and Collect – 2hrs
Orders over $30
- Parcel – FREE
- Express – From $10
- Click and Collect – 2hrs
5% Off
10% Off
15% Off
| System of Measurement | Metric |
|---|---|
| Product | Nyloc Insert Nut |
| Size | M8 (8mm) |
| Size & Thread Pitch | M8 x 1.25p Coarse |
| Thread Pitch | 1.25mm |
| Thread | Coarse |
| Thread Direction | Right Hand |
| Corrosion Protection Level | Excellent |
| Class Grade | High Tensile Class 6 |
| Material | Carbon Steel |
| Finish | Mechanically Galvanised |
| Across Flats (af) | 12.73 - 13.00mm |
| Across Corners (ac) | 14.38 - 15.00mm |
| Nut Height Overall (b) | 7.64 - 8.00mm |
| Hex Height (h) | 5.50mm |
| Spanner Size (af) | 13mm |
| Closest size in imperial | 5/16" |
| Standard Made To | DIN985 |
| Brand | Hobson Engineering |
| Alternative Brands | Bremick Fasteners | Brighton Best |
Dimensional data is a guide only. Tolerance differences exist between brands and batches
About Nyloc Insert Nuts
Nyloc Insert Nuts have a nylon ring at the top that grips the bolt thread once the nut is fully seated. The grip is friction-based, so the nut stays tight under vibration without a separate lock washer. Single-use is recommended. The nylon insert deforms on first install and loses bite on re-use.
Recommended use The standard outdoor finish for timber framing, fencing, decking, retaining walls and treated-timber contact (H3 and H4 treated pine). Decades of corrosion protection in most outdoor and rural environments.
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.
Frequently Asked Questions
Vibration is the main reason fasteners come loose. Locking nuts add a friction-locking element (a nylon insert, a deformed metal thread, or a tapered crown) that grips the bolt thread once the nut is fully seated. They are not a substitute for correct torque, but they protect against loss of preload from vibration over time.
On a Nyloc, the unthreaded nylon ring is forced down onto the bolt thread as the nut is tightened. The thread cuts into the nylon, which grips back. On all-metal styles, the locking action comes from a controlled distortion in the top threads that pinches the bolt thread when fully seated.
Best practice: use a fresh Nyloc every time the joint is rebuilt. The locking torque drops noticeably after the first installation as the nylon takes a permanent set.
Match diameter and pitch exactly. The bolt's strength class should be equal to or lower than the nut's class. A higher-class nut on a lower-class bolt is safe; the reverse can strip the bolt before the nut yields.
See the head marking chart and full strength table on our site for the full conversion table.
Locking-nut standards specify the locking torque (the torque required to first run the nut down a bolt) as well as the usual dimensional and strength requirements.
Drive these with a matching spanner, socket or driver bit. Using an oversized tool will round off the head.
Standard polyamide 6.6 insert is rated to about 120 C continuous, 150 C short-term. For higher temperatures use an all-metal locking nut (e.g. Conelock, Stover, K-Lock) which has no nylon and is rated to the same temperature as the steel itself.
Material & Coating
Galvanised Hot-dip galvanised carbon steel. The standard outdoor finish; thick zinc coating gives decades of corrosion resistance. The right choice for trailer chassis, mast and pole mounting, structural pipe clamping and outdoor tank fittings.
Matching Finishes Always match the finish across the assembly. Hot-dip galvanising adds a much thicker coating than zinc plating, so a zinc-plated nut will not wind onto a galvanised bolt, and a galvanised nut on a zinc-plated bolt will be loose. Pair galvanised bolts with galvanised nuts and washers.
Important Performance in permanent coastal applications (within 300 metres of the sea) is reduced. Refer to AGA technical bulletins or contact us for the right grade for severe marine exposure.
Class Metric fasteners are classified as class 2, 4.6, 8.8, 10.9, 12.9, 14.9. See the head marking chart and full strength table.
Thread Pitch & Terminology
Thread Pitch (Metric) Metric fasteners measure thread pitch as the distance between thread peaks, expressed in millimetres. Metric also branches into three series: coarse (the default; widest tolerance, easiest to tap), fine (a tighter pitch for higher clamp load or thinner walls), and extra fine (the tightest pitch, used for thin-wall tube, precision instruments, and aerospace fittings where vibration loosening must be minimised). Always match the series as well as the size - a metric fine nut will not engage a metric coarse bolt of the same diameter, and an extra fine nut will not engage either. This product has a 1.25mm coarse pitch, meaning the peaks are 1.25mm apart.
How to Measure
A nut is named after the bolt it fits. An M10 nut fits an M10 bolt - the 10mm is the bolt's diameter, not anything on the nut itself.
The two quick checks are the spanner size across the flats, and the hole, which always measures smaller than the named size (an M10 nut reads about 8.5mm through the hole).
The most reliable test of all: thread it onto a bolt you know. The right nut spins on by hand with no force.
Resources
For full technical data including key product information, range and a CAD drawing, see our Technical PDFs library.
Convert between metric and imperial sizes, gauge to mm, decimal to fraction and TPI to pitch with our measurement conversion calculators.
Pricing & Delivery
Includes GST, a Tax Invoice and Free Standard Delivery anywhere in Australia.
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Technical data Researched and compiled from numerous industry sources for the sole purpose of providing basic information. All material is advisory only and its use by anyone is entirely voluntary. Reliance on it for any purpose by anyone is at the sole risk of that person, and Bolt and Nut Australia is not responsible for any loss, claim or damages arising therefrom. In developing this information, Bolt and Nut Australia has made a determined effort to present it accurately.
Measurements Sizes are taken from supplier catalogues or hand-measured and should be used as a guide. Minor variation between batches is normal. Stock is sourced from various suppliers, so differences may exist between batches in thread length, markings, appearance or finish.
Product Photos & PDF Data Sheets Represent the product type, not exact size. PDFs are a reference guide only. Specifications may change without notice.
If you see any problems with any of our specifications or you require additional information please contact us.
Delivery
Weigh less than 500grams
Exceptions: Tools, Kits, Bulky items = Sent as a parcel with tracking
Small orders that fit into the slot of your Letterbox are sent:
FREE with Aust Post Letter delivery with NO TRACKING and delivery between 4-12 business days
Or
Select a Quicker delivery service
- $7.00 Parcel Delivery 2-7 business days
- From $12.00 Express Delivery 1-4 business days
- From $14.00 StarTrack PREMIUM Express Delivery 1-3 business days
Or
Click & Collect - Warehouse pickup
Unit 9, 93 Rivergate Place, Murarrie, QLDPlace your order online and we will have it ready within 2 hours. Call if required sooner
Pickup times between 8am - 4pm, Monday - Friday
Weigh more than 500grams
Included is orders under $30 but weigh more than 500grams or wont fit in the slot of your letterbox
Including Large and Bulky heavy orders are sent:
FREE as a Parcel Delivery WITH TRACKING and delivery between 2-7 business days
Or
Select an Express delivery service
- From $12.00 Express Delivery 1-4 business days
- From $14.00 StarTrack PREMIUM Express Delivery 1-3 business days
Or
Click & Collect - Warehouse pickup
Unit 9, 93 Rivergate Place, Murarrie, QLDPlace your order online and we will have it ready within 2 hours. Call if required sooner
Pickup times between 8am - 4pm, Monday - Friday
Further delivery information can be found on our Delivery page
Supplier Details
| MPN | NN06GCM08, NNMC608G |
| UPC | 9314818581615 |
