Carrillo BLT-WMC7-1 WMC H-11 Tool Steel Connecting Rod Bolt 7/16 in.-20 (Single)

The Carrillo BLT-WMC7-1 is a replacement WMC-series H-11 tool steel connecting rod bolt, sold individually, designed for use with CP-Carrillo performance connecting rods. Engineered for high-performance and racing applications, this bolt is a direct replacement fastener to maintain the integrity of your rod assembly.

CP-Carrillo's WMC rod bolts are manufactured from H-11 tool steel with a tensile strength rating of 220 KSI, delivering the clamping force and fatigue resistance required in demanding performance engine builds. The fastener features asymmetrical threads, where each thread has a slightly different design than the previous, distributing thread engagement evenly to increase clamp load and extend fastener fatigue life.

Key Specifications:

• Thread Size: 7/16 in.-20
• Bolt Diameter: 7/16 in.
• Underhead Length: 1.750 in. (44.45 mm)
• Nut Style: 12-point
• Cap Retention Style: Cap screw
• Wrench Size: 1/2 in.
• Material: H-11 Tool Steel
• Tensile Strength: 220 KSI
• Finish: Silver paint
• Quantity: Sold individually (1 bolt)
• Nuts Included: No

Each CP-Carrillo fastener design is based on a known yield load that should never be reached during linear bolt stretch. H-11 tool steel WMC bolts are rated for approximately 15–18 torque cycles. CP-Carrillo recommends using the stretch method for installation along with the recommended assembly lube for consistent and accurate preload. Torque figures alone are not CP-Carrillo's preferred installation method, as torque is affected by numerous variables that can alter true preload values.

These bolts are ideal as replacement fasteners for existing Carrillo rod assemblies or when building fresh connecting rods that call for the WMC bolt specification. The material code and serial number are engraved on the bottom of each bolt for easy identification.