Hexagon Head Cap Screw Cummins 3178947

High-Performance Hexagon Head Cap Screw 3178947

The Cummins 3178947 Hexagon Head Cap Screw is a specialized heavy-duty fastener designed for high-stress applications within commercial diesel engines. Engineered for precision and durability, this screw ensures the structural integrity of critical engine assemblies, maintaining tight connections under extreme operational vibrations and thermal cycles.

Technical Specifications

• Part Number: 3178947
• Dimensions: 5/16 – 18 x 1 1/4″
• Head Type: Hexagon (facilitates efficient torque application with standard tools)
• Material: High-strength steel for superior tensile strength
• Weight: 0.03 lb

Engine Compatibility

This component is integral to several Cummins engine platforms, including:

• K Series: K38, K50, KTA38GC
• QSK Series: QSK38 (CM2150/CM850), QSK50 (CM2150/CM2350)
• Gas Engines: GTA38 G CMEICS

Key Applications

The 3178947 screw is utilized across multiple engine systems to ensure reliable performance:

• Cylinder Block & Head: Securing the cylinder block to the base and maintaining the seal between the head and block.
• Camshaft Mounting: Ensuring precise valve timing by securing the camshaft assembly.
• Lubrication System: Fastening oil manifolds, oil control valves, and piston cooling valves.
• Internal Hardware: Used in short block and long block assemblies to secure main bearings and oil connections.