S-99553A140 4-40 x 1/8" ASME B18.3 Set Screws
Set 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 corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and extended service life.
- Precise and secure fastening ensured by the Class 3A thread fit, minimizing the risk of loosening under vibration.
- High-strength performance from Rockwell B80 hardness, providing reliable clamping force and durability.
- Easy installation and removal with the hex drive design, allowing for efficient assembly with standard tools.
- Effective component positioning thanks to the oval tip, which minimizes surface damage to the shaft.
- Broad industrial compatibility with UNC coarse threading and right-hand direction, conforming to common assembly requirements.
- Compliance with major standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
This 4-40 UNC set screw in 316 Stainless Steel is engineered to address critical challenges in precision assemblies, such as machinery, automotive components, and electronic enclosures. Its headless design and hex drive facilitate compact installations where space is limited, while the oval tip provides concentrated clamping force without marring surfaces. The coarse thread spacing and Class 3A thread fit enhance grip in materials prone to stress, reducing the need for frequent retightening. By combining corrosion-resistant properties with high hardness, this fastener delivers long-term reliability in demanding conditions, from marine to chemical processing industries.
Specification Summary & Compliance
This set screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC threading per ASME B18.3. It meets regulatory requirements such as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety. Manufactured from 316 Stainless Steel with a Rockwell B80 hardness, it guarantees consistent performance in industrial applications.
