Fractional Sizes Medium Carbon Steel Grade 5 Hex Tap Bolt with Clear Cr3 Zinc Plating

Fractional Size Grade 5 Hex Tap Bolts with Clear Cr3 Zinc Plating

Fractional size medium carbon steel Grade 5 hex tap bolts are high-strength, fully threaded fasteners engineered for dependable performance in structural and mechanical assemblies. Manufactured from heat-treated medium carbon steel and finished with clear Cr3 zinc plating, these hex tap bolts offer an ideal balance of strength, corrosion resistance, and installation efficiency for demanding industrial applications.

What Is a Grade 5 Hex Tap Bolt?

Grade 5 hex tap bolts are designed to meet SAE J429 mechanical requirements. Made from quenched and tempered medium carbon steel, they deliver significantly higher tensile strength than low carbon alternatives such as Grade 2 or A307 bolts.

Key mechanical properties include:

• Minimum tensile strength of approximately 120,000 PSI

• High yield strength for secure clamping force

• Improved resistance to shear and vibration

• Three radial head markings for grade identification

Because they are fully threaded, hex tap bolts provide maximum thread engagement when installed into tapped holes or used with nuts.

Fractional Sizes and Thread Configurations

Common Inch Diameters

Fractional size Grade 5 hex tap bolts are available in standard UNC (coarse) and UNF (fine) threads, with common diameters including:

• 1/4"

• 5/16"

• 3/8"

• 1/2"

• 5/8" and larger

UNC threads are preferred for general construction and steel assemblies, while UNF threads offer increased tensile holding power in precision applications.

Clear Cr3 Zinc Plating Advantages

Clear Cr3 (trivalent chromium) zinc plating provides moderate corrosion protection while complying with modern environmental standards. This finish enhances durability without significantly altering thread fit or tolerances.

Benefits include:

• Bright, clean silver appearance

• Protection against rust in indoor and light outdoor environments

• Smooth installation with reduced friction

• RoHS-compliant surface treatment

Industrial Applications

Grade 5 hex tap bolts with clear Cr3 zinc plating are widely used in:

• Automotive assemblies

• Equipment manufacturing

• Structural steel connections

• Agricultural machinery

• Maintenance and repair operations

Why Choose Grade 5 Hex Tap Bolts?

• Higher strength than low carbon alternatives

• Full-length threading for maximum grip

• Reliable clamping performance under load

• Corrosion-resistant zinc finish

For high-strength fractional inch fastening, medium carbon steel Grade 5 hex tap bolts with clear Cr3 zinc plating deliver durability, compliance, and long-term performance.