Hex Cap Bolts Grade-8 Steel

Usages for Grade 8 Hex Bolts

Grade 8 hex bolts are used in applications requiring higher clamping force and fatigue resistance than Grade 5 bolts can provide. Common uses include heavy equipment frames, truck and trailer chassis, agricultural machinery, hydraulic cylinder mounts, industrial presses and tooling, and gearbox and drivetrain assemblies. They are identified by six radial lines on the bolt head and must be paired with compatible Grade 8 or higher nuts to develop full joint strength.

Grade 8 Hex Bolts for all Industries

Grade 8 hex bolts are used across heavy equipment manufacturing, automotive and truck assembly, agricultural equipment production, industrial machinery fabrication, and MRO maintenance programs. OEM manufacturers, equipment builders, and maintenance teams who need a strong, widely available hex bolt without the complexity of ASTM structural certification consistently specify Grade 8. Blue Ribbon Fastener supplies Grade 8 bolts in production quantities with competitive pricing for OEM and MRO programs.

Grade 8 Hex Bolts Features for Engineers & Buyers:

• SAE J429 Grade 8 — minimum 150,000 psi tensile strength
• Six-radial-line head marking for positive grade identification
• Available in full-thread and partial-thread (hex cap) configurations
• Zinc-plated and plain (mill) finishes stocked
• Wide range of diameters (1/4" through 1-1/2") and lengths
• Compatible with Grade 8 and Grade C heavy hex nuts
• Volume pricing for OEM and production programs — call or request a quote