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1/4" x 20 TPI UNC Coarse Zinc Hex Bolts Grade 8 High Tensile AS 2465
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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
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| System of Measurement | Imperial |
|---|---|
| Product | Hex Head Bolt |
| Head Type | Hex Head |
| Size | 1/4" |
| Size & Thread Pitch | 1/4" x 20 TPI UNC |
| Thread Pitch | 20 TPI |
| Thread | Coarse |
| Thread Direction | Right Hand |
| Corrosion Protection Level | Moderate |
| Class Grade | High Tensile Grade 8 |
| Material | Carbon Steel |
| Finish | Zinc Plated |
| Length (l) | Select from the dropdown |
| Thread Length (t) | Select length to view. Are APPROX and can vary 1/4" +/- |
| Product Diameter (d) | 0.242 - 0.249" (6.15 - 6.33mm) |
| Across Flats (af) | 0.425 - 0.438" (10.80 - 11.13mm) |
| Across Corners (ac) | 0.488 - 0.505" (12.40 - 12.83mm) |
| Head Height (h) | 0.150 - 0.163" (3.81 - 4.15mm) |
| Spanner Size (af) | 7/16" |
| Drive Type | Hex |
| Closest size in mm | M6 (6mm) |
| Standard Made To | AS2465-1999 |
| Brand | Hobson Engineering |
| Alternative Brands | Brighton Best | Bremick Fasteners |
Dimensional data is a guide only. Tolerance differences exist between brands and batches
About Hex Bolts & Set Screws
Hex Bolts and Set Screws are the workhorses of the bolting world. The default fastener whenever you need to clamp two parts together with a spanner on both ends. Six-sided head driven with a spanner or socket, and a fully or partially threaded shank. A hex bolt is partially threaded (plain shank under the head); a hex set screw is fully threaded right up to the head. Used for metal-to-metal joints, machinery assembly, structural framing, and any application that needs reliable clamp load.
Recommended use Indoor and dry-environment use only. Common in automotive, machinery and electrical assembly where the bolt is not exposed to weather, condensation or wet service.
Compare your fastener to our visual size guide to confirm M-size, pitch and length.
Match your spanner / socket AF (across-flats) to the bolt size it fits. Our reference chart covers every metric and imperial size we stock.
Frequently Asked Questions
Partial thread is preferred where the unthreaded shank passes through the joint (better bearing area). Full thread is used where the joint clamps near the head.
See the head marking chart and full strength table on our site for the full conversion table.
The standard defines head dimensions, thread tolerance, mechanical properties and the marking convention on the head.
Drive these with a matching spanner, socket or driver bit. Using an oversized tool will round off the head.
Add a spring washer or Nyloc nut if the joint is subject to vibration. For metal-to-metal structural connections, hardened washers may be required.
Refer to the Material & Coating section above for the full environmental rating of this finish.
All plain-carbon and alloy steel fasteners are magnetic. Zinc plating, hot-dip galvanising and zinc-flake coatings do not change this. The magnetism comes from the steel core, not the surface treatment.
Material & Coating
Zinc Electroplated zinc on carbon steel. A thin (5 to 12 micron) bright (clear-passivated) zinc layer applied by electrolysis. Bright silvery finish.
Important NOT suitable for outdoor, wet, marine or treated-timber applications. The thin coating is consumed quickly by rainwater or treated-pine preservatives. For outdoor use, specify hot-dip galvanised.
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 20 TPI, meaning 20 thread peaks per inch.
How to Measure
Fastener Length This product has a head that sits on top of the material, so the length is measured from directly under the head to the tip of the thread. The head itself is not included in the size.
Thread Length On a bolt the thread length runs from the start of the unthreaded section (called the shank) to the end of the thread. Set screws are fully threaded. If the length is 75mm, the thread length is 75mm. To view the thread length, select a length above.
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 | BHG8ZC0250050, 453002, BHG8ZC0250075, HUC804003Z, B80CZ060752, 453006, BHG8ZC0250100, HUC804010Z, B80CZ061002, 453010, BHG8ZC0250125, B80CZ061252, 453012, BHG8ZC0250150, HUC804012Z, B80CZ061502, 453014, BHG8ZC0250175, 453016, BHG8ZC0250200, HUC804020Z, B80CZ062002, 453018, BHG8ZC0250250, HUC804022Z, B80CZ062502, 453022, BHG8ZC0250300, HUC804030Z, B80CZ063002, 453026, BHG8ZC0250350, HUC804032Z, B80CZ063502, 453028, BHG8ZC0250400, HUC804040Z, B80CZ064002, 453030, BHG8ZC0250450, 453031, BHG8ZC0250500, 453032, BHG8ZC0250600, 453034 |
| UPC | 9314818698399, 662403694776, 9314818698405, 9337357062094, 662403809149, 9314818698412, 9337357062100, 662403694790, 9314818698429, 9337357062117, 082893999241, 9314818698436, 9337357062124, 662403690778, 9314818698443, 662403809224, 9314818698450, 9337357062148, 662403809248, 9314818698474, 9337357062155, 662403809286, 9314818698498, 9337357062179, 662403809323, 9314818698504, 9337357062186, 662403809361, 9314818698511, 9337357062193, 662403809408, 9314818698528, 662403809422, 9314818698535, 662403809446, 9314818698559, 662403809484 |
