Plow bolts are specialized fasteners designed for demanding applications in agricultural implements, road construction machinery, and other heavy equipment where high strength and a smooth, flush surface are required. The low-profile head design allows the bolt to sit flush with the mounting surface, reducing wear and preventing snagging during operation.
Key Features
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Low-profile head design: Sits flush with the mounting surface to minimize protrusion
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Square or ribbed neck beneath the head: Prevents rotation during installation
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High strength grades: Available in Grade 5 and Grade 8 for demanding applications
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Threaded shank: Fully or partially threaded depending on application requirements
Available Types
| Head Style | Description |
|---|---|
| Flat Head Plow Bolt | Standard flat countersunk head for flush mounting; most common configuration |
| Domed Head Plow Bolt | Slightly domed, low-profile head that offers increased bearing surface |
Applicable Standard: ASME B18.9 (Plow Bolts)
Mechanical Properties
| Grade | Tensile Strength | Hardness | Head Marking |
|---|---|---|---|
| Grade 5 | 120,000 PSI minimum | Rockwell C25–34 | Manufacturer ID + three radial lines 120° apart |
| Grade 8 | 150,000 PSI minimum | Rockwell C33–39 | Manufacturer ID + six radial lines 60° apart |
Materials
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Medium Carbon Steel (Grade 5)
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Alloy Steel (Grade 8)
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Stainless Steel
Surface Finish
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Black Oxide (standard)
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Zinc plating (available upon request)
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Other finishes as specified
Common Applications
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Agricultural equipment (plows, cultivators, harrows, discs)
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Road construction machinery (graders, scrapers, pavers)
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Heavy equipment (dozers, loaders, excavators)
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Mining and earthmoving equipment
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Snowplow blades and attachments
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