Six-Sided Head Close Tolerance Bolts Long Thread Dog Point

Precision fastening demands components engineered to deliver consistent performance under exacting conditions. Our Hex Fit Bolts with Extended Thread Dog Point are manufactured for assemblies where hole alignment and shear resistance are critical. These fasteners feature a six-sided drive head that provides ample torque transfer during installation, paired with a shank held to close dimensional tolerances for a near-interference fit. The elongated thread section ensures full thread engagement in thicker materials or stack-ups, while the dog point simplifies alignment by guiding the bolt into tapped holes. Often specified as Hexagonal Interference Fit Bolts with Long Thread Dog Point, they eliminate the need for separate drift pins in many assembly sequences. Engineers seeking a robust locating bolt frequently turn to our Long Thread Dog Point Hexagon Close Fit Bolts, which combine the benefits of a close-tolerance body with a reduced-diameter lead to speed placement without sacrificing joint integrity. Each lot is traceable, with full material certifications available upon request.

Our Six-Sided Head Close Tolerance Bolts Long Thread Dog Point are produced from alloy steel, stainless steel, and nickel-based alloys to suit a wide range of service environments. The head is forged to standard wrench dimensions, and the bearing surface is machined flat for consistent clamp load distribution. Threads are rolled after heat treatment for superior fatigue resistance, with a Class 3A tolerance on the thread form. The dog point pilot conforms to ASME B18.2.1 specifications, and the unthreaded portion of the shank is ground to a tight diameter tolerance, typically +0.0000/-0.0005 inch, to support close-fit hole installations. Below is a summary of core features:

• Close-tolerance body for controlled gap or interference fit
• Extended thread length maximizes grip range
• Dog point tip aligns multiple plies during assembly
• Rolled threads offer enhanced fatigue life
• Available in inch and metric sizes
• Standard finishes include zinc flake, cadmium, and Xylan

The table below presents key dimensional and material options for standard configurations:

Each batch undergoes magnetic particle inspection on the pilot and first full thread, with random samples pulled for tensile and double shear testing. Custom dog point geometries, thread lengths, and underhead configurations can be engineered to meet your specific assembly requirements. Contact our technical team for a part number cross-reference or to request a full PPAP package.