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5/8" x 6 TPI ACME Plain Black Uncoated Grade 5 Hex Nut High Tensile
| BUY MORE. SAVE MORE. | ||||
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| Price for each item | Subtotal | % savings | ||
| Buy 1 | Buy 1 | $34.00 each | $34.00 | - |
| Buy 2 + | Buy 2 - 4 | $30.00 each | $60.00 | 11.76% |
| Buy 5 + | Buy 5 - 9 | $29.00 each | $145.00 | 3.33% |
| Buy 10 + | Buy 10 - 19 | $28.00 each | $280.00 | 3.45% |
| Buy 20 + | Buy 20 - 29 | $27.00 each | $540.00 | 3.57% |
| Buy 30 + | Buy 30 - 49 | $26.00 each | $780.00 | 3.70% |
| Buy 50 + | Buy 50 + | $25.00 each | $1,250.00 | 3.85% |
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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 | Imperial |
|---|---|
| Product | ACME Hex Nut |
| Size | 5/8" |
| Size & Thread Pitch | 5/8" x 6 TPI Acme |
| Thread Pitch | 6 TPI |
| Thread | Acme |
| Thread Direction | Right Hand |
| Corrosion Protection Level | Low |
| Class Grade | High Tensile Grade 5 |
| Material | Carbon Steel |
| Finish | Can be either Plain Black uncoated or a Bright Steel appearance |
| Across Flats (af) | 0.985 - 1.010" (25.02 - 25.66mm) |
| Across Corners (ac) | 1.102 - 1.161" (28.02 - 29.49mm) |
| Nut Height Overall (b) | 0.552 - 0.562" (14.03 - 14.28mm) |
| Spanner Size (af) | 1" |
| Closest size in mm | M16 (16mm) |
| Brand | Hobson Engineering |
Dimensional data is a guide only. Tolerance differences exist between brands and batches
About Hex Acme Nuts
Hex Acme Nuts have a trapezoidal thread profile rather than the standard 60-degree V profile. The wider, flatter thread gives more contact area for power transmission and resists wear under sliding load. Used on lead screws, clamping screws, jacks, vices, and any application where the screw thread converts rotation to linear movement under load.
Recommended use Indoor, oiled or sacrificial-wear applications where the fastener is replaced periodically. Common in machinery internals, ground-engaging equipment subject to wear, and any high-tensile assembly that will be painted, oiled or sealed after install.
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
The nut must match the bolt's diameter AND pitch (metric) or TPI (imperial). A 5/8" x 6 TPI nut will not engage a bolt with a different pitch, even when the diameter is the same. Strength class of the nut should equal or exceed the bolt class.
See the head marking chart and full strength table on our site for the full conversion table.
Standards specify the nut's head dimensions, thread tolerance, and minimum strength class. Always pair the nut with a bolt to the equivalent standard for a guaranteed fit.
Drive these with a matching spanner, socket or driver bit. Using an oversized tool will round off the head.
Nuts are the half of the bolted joint that lets it come apart again. Match diameter, pitch and class to the bolt; add a flat washer under the nut to spread load on the clamped face.
Material & Coating
Plain Black Uncoated Carbon steel. No corrosion protection. The dark colour is a thin oxide layer from the heat treatment process, not a corrosion barrier. Appearance varies from light grey to dark black across batches due to the heat treatment process, so colour consistency is not guaranteed between orders.
Important Will corrode rapidly in any wet or humid environment. NOT suitable for outdoor or coastal use without a separate coating.
Grade Imperial fasteners are classified as grade 2, 5, 8, 9, 10, 12. See the head marking chart and full strength table.
Thread Pitch & Terminology
Thread Pitch (Imperial) Imperial fasteners measure thread pitch as TPI (threads per inch), the number of thread peaks per inch of fastener length. Imperial systems include UNC (coarse), UNF (fine), BSW (Whitworth) and BSF (British Standard Fine). This product has 6 TPI, meaning 6 thread peaks per inch.
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 | NHMSPA062 |
| UPC | 9314818510646 |
