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ENGINEERING & PERFORMANCE CHARACTERISTICS

• Shoulder diameter ground to tight tolerances for slip-fit or guided motion.

• Shoulder length controlled for repeatable stack-up and spacing accuracy.

• Concentricity between head, shoulder, and thread supports smooth rotation.

• Threads are intended for retention only and are not load-bearing in shear.

• Suitable for high-cycle applications when properly lubricated.

  • Description
  • Features
  • Specifications

SOCKET SHOULDER BOLTS (SHOULDER SCREWS / STRIPPER BOLTS)

Socket shoulder bolts, also commonly referred to as shoulder screws or stripper bolts, are precision fasteners engineered to provide accurate alignment, controlled spacing, and smooth sliding or rotational motion between components. Unlike fully threaded fasteners, socket shoulder bolts feature a precision ground shoulder that functions as the primary load-bearing and guiding surface, while the threaded portion provides retention only.

These fasteners are essential in tooling, dies, molds, automation equipment, and mechanical assemblies where repeatable motion, wear resistance, and dimensional accuracy are critical.

COMMON APPLICATIONS

  • Die sets, molds, and stripper plate assemblies.
  • Automation equipment and mechanical linkages.
  • Sliding plates, cams, levers, and guide mechanisms.
  • Precision fixtures and alignment systems.
  • Wear-critical joints requiring repeatable motion.
  • Assemblies requiring controlled spacing and alignment.

DESIGN CONSIDERATIONS

  • Shoulder diameter should match the mating hole for proper alignment and wear control.
  • Shoulder length must fully span the moving or spaced components.
  • Threads should not contact the bearing surface.
  • Lubrication is recommended for high-cycle sliding applications.
  • Proper torque ensures retention without restricting movement.
  WHY G-FAST DISTRIBUTION G-Fast supplies socket shoulder bolts using an engineering-first approach focused on dimensional accuracy, material performance, and application suitability. Through our Fasteneering® process, we review supplied prints for manufacturability, feasibility, and cost efficiency, ensuring each shoulder bolt performs reliably in its intended guiding, spacing, or motion-control role.
  • Precision ground shoulder provides accurate alignment and controlled motion.
  • Shoulder carries shear and wear loads, isolating threads from bearing forces.
  • Controlled shoulder length establishes precise spacing between components.
  • Internal drive allows controlled torque application in compact assemblies.
  • Designed for sliding, rotating, or locating functions rather than clamping alone.

AVAILABLE MATERIALS

G-Fast manufactures and supplies socket shoulder bolts in a broad range of materials to meet strength, wear, corrosion, and environmental requirements:

Carbon & Alloy Steels

  • Heat-treated, precision ground alloy steel for high strength and wear resistance.
  • Ideal for tooling, dies, automation, and high-cycle mechanical motion.

Stainless Steels

  • Precision ground, heat-treated 410 and 416 stainless steel for high-strength stainless applications.
  • 18-8 (300, 303, 316) stainless steel for corrosion resistance in general industrial environments.
  • Additional stainless grades available to meet specific corrosion or mechanical requirements.

Exotic & Specialty Materials

  • Titanium – high strength-to-weight ratio and corrosion resistance.
  • Monel – excellent performance in marine and chemical environments.
  • Hastelloy – engineered for extreme temperature and highly corrosive conditions.
  • Other specialty alloys available upon request.

THREAD OPTIONS & CONFIGURATIONS

  • Standard right-hand threads.
  • Left-hand threads available for applications requiring reverse rotation resistance.
  • Inch and metric thread systems supported.
  • Unified coarse, fine, and ISO thread forms available.
  • Custom thread lengths, pitches, and tolerances available through Fasteneering® review.

INCH & METRIC AVAILABILITY

  • Inch sizes available across standard shoulder diameters and lengths.
  • Metric sizes available to ISO dimensional standards.
  • Standard and custom shoulder lengths supported.
  • Modified shoulder diameters, head styles, and made-to-print configurations available.