Value Collection 37817 Plow Bolt 1-1/4-7 Unc 4 in Grade 8

Product Description

The VALUE COLLECTION 37817 is a Grade 8 alloy steel plow bolt with a 1-1/4-7 UNC thread size and a 4-inch overall length. It features a domed head profile and a yellow zinc dichromate finish that provides corrosion resistance in outdoor and harsh-environment applications. Grade 8 alloy steel delivers high tensile strength suitable for heavy-load fastening tasks. This bolt is used in heavy equipment, agricultural machinery, road grading equipment, and structural assemblies where a flush or low-profile head is required. Installation is typically performed by equipment mechanics, ironworkers, or maintenance technicians.

Plow bolts are commonly specified for applications where the fastener head must sit flush or recessed into the mating surface, preventing interference with moving materials or blades. The domed head style on the 37817 seats into a countersunk hole and resists rotation during tightening. This makes the bolt well suited for blade mounting on graders, dozers, scrapers, and similar heavy-duty equipment. The yellow zinc dichromate finish adds a layer of protection against oxidation in field conditions.

Key Features

• Grade 8 alloy steel construction for high tensile and shear strength
• 1-1/4-7 UNC thread form for compatibility with standard inch-series hardware
• 4-inch overall length suits deep blade and structural mounting applications
• Domed head seats flush in countersunk holes and resists spinning during installation
• Yellow zinc dichromate finish provides corrosion resistance in outdoor environments

Compatibility

Designed as a standard-pattern plow bolt for heavy equipment blade assemblies and structural applications requiring a 1-1/4-7 UNC Grade 8 fastener with a 4-inch overall length and domed head seating.

Installation Notes

Installation is performed by qualified equipment mechanics or maintenance technicians. Ensure the mating countersunk hole is properly sized and free of debris before seating the domed head. Use the correct Grade 8 heavy hex nut and hardened washer to maintain clamp load. Torque to the fastener manufacturer or equipment OEM specification; do not substitute a lower-grade nut or washer with this Grade 8 bolt.