Value Collection D39449 Hex Head Cap Screw 5/8-18 X 2 in Grade 8

Product Description

The VALUE COLLECTION D39449 is a fully threaded hex head cap screw designed for high-strength fastening applications in mechanical, structural, and industrial assemblies. Sized at 5/8-18 UNF with a 2-inch length under head, this fastener is manufactured from Grade 8 steel and finished with a zinc yellow dichromate coating that provides corrosion resistance in demanding environments. Conforming to ASME B18.2.1 and SAE J429 standards, it suits applications where tensile strength and dimensional accuracy are required. Licensed trades and maintenance professionals rely on Grade 8 hex cap screws for high-load connections where lower-grade fasteners would be inadequate.

This screw is suited for use in equipment assembly, machinery repair, heavy-duty brackets, and structural connections requiring a fine-thread UNF fastener. The 5/8-18 thread pitch is a fine-series designation that provides increased thread engagement and resistance to loosening under vibration. Typical install environments include industrial machinery, automotive assemblies, and commercial mechanical equipment where controlled torque and reliable clamping force are critical. The minimum order quantity is 10 pieces.

Key Features

• Grade 8 steel construction meets SAE J429 tensile and yield strength requirements
• Fully threaded 5/8-18 UNF fine-thread profile for increased thread engagement
• Zinc yellow dichromate finish provides corrosion protection in moderate-exposure environments
• Conforms to ASME B18.2.1 dimensional standards for consistent fit and interchangeability
• 2-inch length under head suits medium-depth clamping and fastening applications

Compatibility

Designed as a standard UNF hex head cap screw for use in any application requiring a 5/8-18 fine-thread, 2-inch fully threaded Grade 8 fastener conforming to ASME B18.2.1 and SAE J429.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson using the appropriate hex socket or wrench sized for a 5/8-inch hex head cap screw. Fastener torque should be applied per the applicable equipment service manual or engineering specification for Grade 8 fasteners. Ensure mating threads are clean and free of debris before installation to prevent galling or cross-threading. Do not reuse fasteners that show signs of thread damage, corrosion, or deformation.