EHP-AYP 539109389 Hex Cap Screw HCS 3/8-16 x 3-1/2 Grade 5 OEM Fastener

The EHP-AYP 539109389 is an OEM-specification Hex Cap Screw (HCS) 3/8-16 x 3-1/2, Grade 5 fastener designed for use in Husqvarna, AYP (American Yard Products), Poulan Pro, and related outdoor power equipment. This genuine replacement bolt maintains the exact fit and torque specifications required by the original equipment manufacturer.

Key Features:

• Thread Size: 3/8-16 UNC (Unified National Coarse) thread
• Length: 3-1/2 inches
• Grade 5 Steel — medium-carbon steel construction for reliable tensile strength in demanding applications
• OEM Part Number: 539109389
• Direct OEM replacement — engineered to original specifications for a precise fit
• Compatible with Husqvarna, AYP, Craftsman, Poulan Pro, Sears, and Roper equipment platforms
• Used across multiple equipment types including lawn mowers, zero-turn riders, and stump grinders

Using the correct OEM fastener ensures proper clamping force, thread engagement, and equipment safety. The 539109389 hex cap screw is a common hardware component found throughout the drivetrain, deck, and chassis assemblies of AYP-platform machines. Sold individually.