ACDelco 11561138 Shoulder Screw with 6-Lobed Socket

The ACDelco 11561138 is a genuine GM shoulder screw designed for precision fastening applications in General Motors vehicles. This shoulder screw features a 6-lobed socket head design, also known as a Torx or star drive, which provides superior torque transfer and reduced cam-out during installation.

Key Features:

• Genuine GM OEM part ensuring exact fit and proper function
• 6-lobed socket head design for reliable installation and removal
• Precision-machined shoulder section provides accurate spacing and alignment
• Engineered to meet GM's strict quality and durability standards
• Direct replacement for original equipment hardware

Shoulder screws are specialized fasteners with an unthreaded cylindrical section between the head and threaded portion. This shoulder design allows the fastener to act as a precision pivot point or spacing element while maintaining secure fastening. ACDelco parts are manufactured to exacting specifications and backed by General Motors quality assurance.