S-96125A306 4-40 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
- Exceptional corrosion resistance from Nickel Alloy construction, ideal for harsh industrial environments
- Precise component alignment with a 1/2" shoulder length and standard shoulder fit for stable assembly
- High tensile strength of 70,000 psi and shear strength of 35,000 psi for reliable load-bearing performance
- Superior thread accuracy with Class 3A UNC coarse threads ensuring secure, vibration-resistant fastening
- Easy installation and removal using a 5/64" hex drive and knurled head for improved grip
- Enhanced durability with Rockwell B60 hardness, resisting wear in high-stress applications
- Compliance with RoHS 3 and REACH standards, meeting environmental and safety regulations
Professional Applications & Engineering Value
This 4-40 UNC Class 3A shoulder screw is engineered to address critical alignment and strength challenges in precision assemblies. The Nickel Alloy material offers outstanding resistance to corrosion and oxidation, making it suitable for aerospace, automotive, and electronics industries where exposure to moisture or chemicals is common. The 1/2" shoulder length provides a stable bearing surface, reducing wear on mating parts and ensuring accurate positioning in rotating mechanisms or guide pins. With a coarse thread and right-hand thread direction, it enables quick assembly and disassembly, while the hex drive and knurled head enhance torque application without slippage. Ideal for jigs, fixtures, and machinery requiring high-strength and dimensional stability, this screw minimizes downtime and maintenance costs.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for tight tolerances and reliable engagement. The shoulder diameter is 1/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 1/2" with a tolerance of -0.005" to 0.005", ensuring precise dimensional control. It is manufactured to meet RoHS 3 (2015/863/EU) compliance under exemption 6(c) and is REACH (EC 1907/2006) compliant, confirming its suitability for regulated industrial applications without hazardous substances.
