S-94361A331 1/4"-28 Shoulder Screws
Shoulder Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior tensile strength of 140,000 psi for reliable performance in high-stress applications
- Precision Class 3A thread fit ensures secure, vibration-resistant fastening with minimal backlash
- Black oxide finish provides excellent corrosion resistance and reduced light reflection
- Knurled head texture offers enhanced grip for manual adjustments during assembly
- Alloy steel construction with Rockwell C32 hardness delivers exceptional durability and wear resistance
- Standard shoulder fit maintains accurate component alignment in machinery assemblies
- 5/32" hex drive enables efficient installation with standard tools
Professional Applications & Engineering Value
This alloy steel shoulder screw with 1/4"-28 UNF fine threads and black oxide finish addresses critical engineering challenges in precision machinery and industrial equipment. The Class 3A thread fit provides exceptional dimensional accuracy for applications requiring minimal clearance and vibration resistance, while the 15/16" shoulder length with tight tolerances ensures precise component positioning in rotating assemblies, pivoting mechanisms, and alignment fixtures. The combination of 140,000 psi tensile strength and Rockwell C32 hardness makes this socket head shoulder screw ideal for high-load applications where both structural integrity and wear resistance are paramount. The knurled head facilitates manual adjustments in confined spaces, making it particularly valuable in maintenance operations and precision instrument manufacturing.
Specification Summary & Compliance
This shoulder screw features Class 3A thread fit per UNF standards with precise dimensional tolerances including shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". The product complies with RoHS 3 (2015/863/EU) with exemption 6(a) for lead as an alloying element in steel and is REACH (EC 1907/2006) compliant, meeting international environmental and safety regulations for industrial components.
