- Stock in BC
Machine Bolt with Square Nut · 5/8-11 x 12 in · Galvanized Steel · Hydel 1258M
What this product is for
This 5/8-11 x 12 in (approx. 305 mm) machine bolt is used in pole line hardware assemblies where utility components need a through-bolt connection with a nut. It is supplied in galvanized steel for corrosion resistance in outdoor service.
Use for
Use for fastening crossarm hardware, brackets, braces, clamps, and similar overhead distribution components where a 12 in bolt length and 5/8 in thread size match the assembly requirement. The included square nut supports typical pole line hardware installations.
Avoid for
Avoid using this bolt where a different head style, thread length, coating system, or utility standard is specified. Do not substitute based on diameter alone if the required grip length, loading, or approved hardware schedule differs.
Best for
Best for Canadian utility and contractor applications needing a standard imperial machine bolt for outdoor pole hardware, especially where galvanized finish and an included nut help simplify field assembly.
Installed in
Typically installed in wood pole distribution assemblies, crossarm connections, and other outdoor line hardware applications. As a rule of thumb, buyers usually match bolt length to the total material stack-up plus allowance for the nut and exposed thread. Actual fit depends on hardware thickness and utility construction standards.
Why this product exists
Pole line assemblies often require a longer bolt with corrosion-resistant finish and a compatible nut for secure mechanical fastening in exposed environments. This product addresses that need with a 12 in under-head length, 5/8-11 thread, square head, and galvanized steel construction.
Compared with similar products
Compared with shorter 5/8 in machine bolts, this 12 in version is selected when the hardware stack-up is thicker or when more thread engagement is needed past the nut. Compared with general-purpose construction bolts, pole line machine bolts are chosen to match utility hardware dimensions and field practices.
Specifications
- Brand: Hydel
- Manufacturer part number: 1258M
- Product type: Machine bolt with square nut
- Application family: Pole line hardware
- Thread size: 5/8-11 in
- Length under head: 12 in (approx. 305 mm)
- Thread length: 6 in (approx. 152 mm)
- Head type: Square
- Material/finish: Galvanized steel
- Includes: Square nut
- Measurement system: Imperial
- Tensile strength: 13,500 lb
- Compliance: CSA certified
- Country of manufacture note: Made in Canada with domestic and imported parts
Minimum Order $20
We accept the following payment methods:

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(Contractor Accounts)
Standard Shipping-Free on orders over $249 in Metropolitan Areas / $499 in Rural Areas
(All Other Accounts)
Standard Shipping-Free on orders over $499
Minimum Order Is $20
Freight Surcharge Apply To Oversized/Over-Weight Items(Not Limited To):
- PVC and EMT Pipe
- Wire and Cable
- Items over 48 inches in length
Surcharges are applied to items on an individual basis regardless if the rest of the order meets prepaid levels. If a freight line appears at the time of check out it only applies to the Items carrying a surcharge and not the entire basket of goods.
Shipping Options:
- A courier can deliver to your home, office, or your job site
- Pick up at local depot near you (applies to the following locations)
Edmonton Warehouse 8135 Roper Rd Edmonton, T6E 6S4, AB
Burnaby Warehouse 5608 Goring St Burnaby, V5B 3A3, BC
Orders are typically delivered within two to eleven business days. The transit time begins the first full shipping day after your order leaves our warehouse. Please allow an additional 2-5 days for delivery to remote locations, additional fees may apply.
THE FOLLOWING APPLIES TO STANDARD SHIPPING OPTIONS
- We cannot deliver to P.O. boxes.
- A signature may be required for shipments over $500.
- No weekend delivery.
- Wire & cable, EMT or PVC conduit, tube lamps 4ft or greater, and 10ft ground rods & mast pipes have special conditions.
Standard Shipping cost on orders less than $499
Total shipping cost = "Per Shipment" cost + "Per Item" cost. The "per item" cost is listed in terms of price per pound.
Product Group | Per Shipment* | Per Item |
|---|---|---|
Boxes | $6.99 | $1.49/lb |
Conduit & Raceway | $149.99 | $2.49/lb |
Connectors & Fittings | $5.99 | $1.19/lb |
Data & Structured Home | $5.99 | $1.19/lb |
Distribution Equipment | $5.99 | $1.19/lb |
Emergency Lighting | $6.99 | $1.49/lb |
Heating & Ventilation | $6.99 | $1.49/lb |
Lighting Controls | $5.99 | $1.19/lb |
Lighting Indoor | $6.99 | $1.49/lb |
Lighting Outdoor | $6.99 | $1.49/lb |
Tools | $4.99 | $.99/lb |
Wire & Cable | $49.99 | $2.29/lb |
Wiring Devices | $5.99 | $1.19/lb |
Any combination of the above items | Highest applicable per-shipment charge | As above |
Effective Date: August, 15, 1998
At Evolt Electrical Supply, customer satisfaction is our top priority. Please review our return policy below:
Returns
Defective Items:
- If you receive a defective item, you may return it for a replacement or refund within 30 days of purchase.
- To initiate a return, please contact our customer service team with your order number and a description of the defect.
Non-Defective Items:
- We do not accept returns for non-defective items. All sales are final once the product is shipped or ordered from the manufacturer. In certain circumstances we may amend this so feel free to contact our customer service team.
Return Process
Authorization:
- Before returning any items, you must obtain a Return Merchandise Authorization (RMA) number from our customer service team. Returns without an RMA number will not be accepted.
- Backordered items can not be cancelled if the item is in transit from the manufacturer, contact us to review.
Shipping:
- Customers are responsible for the return shipping costs. We recommend using a trackable shipping service or purchasing shipping insurance.
Condition:
- Returned items must be in their original packaging and condition. Any items returned damaged due to improper packaging or misuse will not be eligible for a refund or replacement.
Refunds
- Once we receive and inspect your returned item, we will notify you of the approval or rejection of your refund.
- Approved refunds will be processed within [7] business days and a credit will automatically be applied to your original method of payment.
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