S-97345A249 1/4"-20 ASME B18.3 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance from 316 stainless steel construction, ideal for harsh industrial and marine environments
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing performance
- Precision Class 3A thread fit ensures secure, vibration-resistant fastening in demanding applications
- Convenient hex socket drive with knurled head for easy installation and removal, even in tight spaces
- Long 1 3/4" shoulder length provides stable bearing surface for rotating components and precise alignment
- Compliance with ASME B18.3 standards guarantees consistent quality and dimensional accuracy
- RoHS 3 and REACH compliant meeting environmental regulations for global industrial use
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw delivers critical engineering value in applications requiring both precision alignment and corrosion resistance. The 1/4"-20 UNC coarse thread with Class 3A fit provides superior vibration resistance in machinery, automation systems, and assembly fixtures. The extended shoulder length serves as a precise axle or pivot point for rotating components, while the knurled socket head with hex drive ensures secure tool engagement during installation. Manufactured from 316 stainless steel, this shoulder screw maintains integrity in corrosive environments including chemical processing, marine equipment, and food machinery, offering long-term reliability where ordinary fasteners would fail.
Specification Summary & Compliance
This precision shoulder screw features 1/4"-20 UNC coarse threads with Class 3A thread fit for superior engagement. Critical dimensions include 3/4" thread length and 1 3/4" shoulder length with tight tolerances (-0.005" to 0.005"). The component meets ASME B18.3 specifications for dimensional consistency and is manufactured from 316 stainless steel with Rockwell B79 hardness. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) ensures environmental responsibility for industrial applications worldwide.
