Hillman Fasteners 220447 Grade 8 Hex Cap Screw 1x2

Product Description

The HILLMAN FASTENERS 220447 is a Grade 8 hex cap screw with a yellow zinc coating, sized at 1 inch diameter by 2 inches in length. Grade 8 hardware carries a higher tensile strength than standard Grade 5 or Grade 2 fasteners, making it appropriate for high-load structural and mechanical connections. The yellow zinc finish provides a base level of corrosion resistance and serves as a visual identifier for Grade 8 classification. This fastener is sold individually and is suitable for use by mechanics, millwrights, contractors, and maintenance technicians working on heavy equipment, agricultural machinery, and structural assemblies.

This hex cap screw is used in applications that require a National Coarse (NC) thread pattern on a 1 inch diameter shank. NC threads are the standard choice for general fastening in steel and iron assemblies where quick assembly and resistance to cross-threading are priorities. Typical install scenarios include heavy equipment frames, trailer hitches, agricultural implements, and industrial machinery where Grade 8 strength is specified by the engineer or OEM design. The yellow zinc coating also helps with bolt identification during maintenance inspections.

Key Features

• Grade 8 tensile strength for high-load structural and mechanical fastening
• National Coarse (NC) thread form for compatibility with standard tapped holes in steel and iron
• Yellow zinc coating provides corrosion resistance and visual Grade 8 identification
• 1 inch diameter by 2 inch length hex cap screw profile
• Standard hex drive fits common wrenches and impact sockets

Compatibility

Designed as an OEM-style replacement or service fastener for applications specifying a 1 inch National Coarse Grade 8 hex cap screw in structural, agricultural, or industrial mechanical assemblies.

Installation Notes

Installation of Grade 8 fasteners is typically performed by mechanics, millwrights, or general contractors using standard hex wrenches or impact tools with the appropriate 1 inch socket. Always verify that the mating nut or tapped hole is rated for Grade 8 service before installation. De-energize, depressurize, or otherwise render safe any equipment before replacing fasteners on live assemblies. Follow applicable engineering specifications or equipment service manuals for proper seating and load requirements.