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Yokelink Square Nuts are the industry standard for securing machine bolts, carriage bolts, and double arming bolts in overhead poleline and transmission applications. The classic four-sided design provides a large bearing surface for wrenches, making it easy for linemen to apply high torque safely, even while wearing heavy insulating gloves.
Oversized Tapped for Perfect Assembly: To accommodate the thickness of our premium Hot Dip Galvanized coating, all Yokelink utility square nuts are overtapped (tapped oversize) after galvanizing. This ensures a smooth, bind-free assembly onto heavily galvanized bolts in the field. Manufactured from high-grade carbon steel, our square nuts meet the rigorous mechanical requirements of ASTM A563 Grade A and are fully galvanized to ASTM A153 Class C for exceptional rust protection.
Design: Traditional square shape for secure wrench engagement.
Threading: UNC (Unified National Coarse) threads, overtapped to fit HDG bolts.
Material: Carbon Steel meeting ASTM A563 Grade A specifications.
Finish: Hot Dip Galvanized (HDG) per ASTM A153 for maximum corrosion resistance.
Dimensions: according to ASME B18.2.2 and IEEE C135.1
Compatibility: Perfect for wooden utility poles, crossarms, and general construction.
| Part No. | Size | Width | Height | Weight |
| Inch (F) | Inch (H) | Kg / Pcs | ||
| A0938 | 3/8"-16 | 5/8 | 21/64 | 0.007 |
| A0912 | 1/2"-13 | 13/16 | 7/16 | 0.027 |
| A0958 | 5/8"-11 | 1 | 35/64 | 0.049 |
| A0934 | 3/4"-10 | 1-1/8 | 21/32 | 0.070 |
| A0978 | 7/8"-9 | 1-5/16 | 49/64 | 0.111 |
| Size | Part No. | HUBBELL | MACLEAN |
| 3/8"-16 | A0938 | 8600M | J8561 |
| 1/2"-13 | A0912 | 55083P | J8562 |
| 5/8"-11 | A0958 | 55084P | J8563 |
| 3/4"-10 | A0934 | 55085P | J8564 |
| 7/8"-9 | A0978 | 56538P | J8564-1/2 |
Q3: What is the difference between a Square Nut and a Heavy Hex Nut in poleline hardware?
A: While both are widely used, a square nut has four sides, offering a larger flat surface area. This makes it much easier for linemen to grip securely with standard wrenches or pliers, especially when wearing thick, high-voltage safety gloves. A heavy hex nut has six sides and is typically used in tighter spaces (like transmission tower joints) where the wrench turning angle is limited.
Q4: Why does my galvanized square nut get stuck or bind on the bolt during installation?
A: If a nut binds on a Hot-Dip Galvanized (HDG) bolt, it usually means the nut was not overtapped.
The HDG process adds a thick, irregular layer of zinc to the bolt's threads. To compensate for this, Yokelink poleline square nuts are specially overtapped (threaded slightly larger) after galvanization, ensuring a smooth, bind-free assembly every time.
Q5: Do I need to use a washer with a square nut on a wooden utility pole?
A: Yes, it is highly recommended. When tightening a square nut directly against a wooden pole, the high clamping force can cause the nut to crush and sink into the wood fibers, weakening the connection over time. You should always place a square flat washer or a curved washer beneath the nut to distribute the load evenly across the wood surface.
Q6: Can I use a standard stainless steel nut with a hot-dip galvanized machine bolt?
A: It is not recommended. Mixing stainless steel and hot-dip galvanized carbon steel in outdoor poleline environments can lead to galvanic corrosion (bimetallic corrosion), which prematurely degrades the zinc coating. For maximum longevity and safety, always pair an HDG square nut with an HDG bolt.
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Main Product:
Poleline Hardware ,
Insulator fitting,
Thimble eye,
Anchor rod,
Sturctral Bolt,
Fastener
