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Socket Head Shoulder Screws

Hex socket head shoulder screws, also known as shoulder bolts, have a hex-shaped socket in a round head, an unthreaded shoulder and a threaded tip. When attached to a stripper plate, these fasteners are also referred to as stripper bolts. The unthreaded portion of the shoulder screw serves as a spacer and bearing surface that allows use with close-fitting rotating parts in engines and machinery and as linear guides in punch-and-die or injection molding sets.

Ondrives.US stocks socket head shoulder bolts in various materials, including martensitic 416 stainless steel and austenitic 303 stainless steel for all standard or metric projects. We offer volume discounts for order quantities of 25 or more.

Need a custom or modified precision shoulder screw? Contact our engineers to discuss your requirements.


Hex Head Stripper Bolt Material & Specification Options for Your Application

When it comes to selecting the best material that fits your application needs, Ondrives.US provides several options. 416 stainless steel is magnetic and heat-treated to increase its hardness and tensile strength. 303 stainless steel offers superior corrosion resistance for severe environments and has slightly lower tensile strength. Other considerations in selecting a precision shoulder screw include:
  • Head diameter
  • Head height
  • Shoulder length and diameter
  • Thread length
  • Thread gauge

Hex Socket Shoulder Screw material & Measurement Info

Precision shoulder screws, shoulder bolts, or stripper bolts have tight dimensional tolerances and are typically manufactured from 303 or 416 stainless steel. Other standard materials include hardened alloy steel, mild steel, 316 stainless, 17-4 PH stainless, brass, and plastics. Socket head shoulder screws are installed using a hex wrench to provide maximum wrenching strength and ensure a secure attachment. Proper measurement standards include:
  • Head Height: measured from the top to bottom of the screw head
  • Shoulder Length: measured from under the screw head to the bottom of the shoulder
  • Thread Length: measured from under the shoulder to the tip of the thread

Selecting the Right Socket Head Shoulder Screw Size

Shoulder length and diameter are the portions that create the journal; thus, they are essential in selecting a hex socket head shoulder bolt. The shoulder must be the appropriate size for secure mounting and proper rotation or alignment. Our Shoulder Screw Buyers Guide provides additional information about selecting the right socket head shoulder bolt for various rotational and sliding applications.

View our product specifications PDF to see a complete listing of our in-stock socket head shoulder screw sizes. All sizes are listed in inches or millimeters and specified by head diameter and height, shoulder-length and diameter, thread length, and type. Custom sizes are also available upon request.

Hex Socket Head Shoulder Screws for Mounting Rotary and Linear Components

The unique design of hex socket head shoulder screws allows them to serve as a shaft or pivot in rotating components, including bearings, levers, bushings, gears, pulleys and more. Shoulder screws can also be used as a stationary linear guide for guiding and aligning parts and components.
Shoulder bolts are highly versatile and suitable for a wide range of applications, including: 
  • Mounting gears, pulleys, sprockets, bearings, and other components
  • Acting as a linear slide to align punches and molds
  • Building custom Cam Followers

Precision Shoulder Screws for Strong and Reliable Fastening

Ondrives.US offers shoulder bolts that feature thread locking via nylon pellet or strip and provide optional head seals using a special coating or O-ring. Thread-locking hex socket shoulder bolts offer a more secure fit and are ideal for mechanical applications requiring higher precision.

The Ondrives.US Advantage

At Ondrives.US, we firmly commit to the quality and consistent improvement of our precision-manufactured hex head shoulder screws. We offer cost-effective solutions, expert service, and timely delivery for all our customer's mechanical components needs.

Custom Hex Socket Head Shoulder Bolt Manufacturing Capabilities

With a fully-equipped production facility, advanced manufacturing equipment, and comprehensive fabrication capabilities, Ondrives.US produces custom hex socket head shoulder bolts that deliver the performance and reliability you need.

Order Precision Shoulder Screws Today

Ondrives.US provides hex socket head shoulder screws, hexalobular (star) head shoulder screws, slotted head shoulder screws, and other precision fasteners designed to meet the requirements of precision machining and other demanding applications. Request a quote for your shoulder bolts today, or contact us to discuss your custom requirements.