S-90484A256 10-32 x 3/8" ASME B18.3, ASTM F835 Tamper-Resistant Hex-Drive Steel Button Head Screws
Tamper-Resistant Hex-Drive Steel Button Head 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
- Tamper-resistant hex drive prevents unauthorized removal, enhancing security in public or restricted-access equipment.
- Class 3A thread fit ensures superior precision and tighter assembly tolerances, reducing the risk of loosening under vibration.
- Black-oxide finish on alloy steel provides excellent corrosion resistance, extending service life in harsh industrial environments.
- 130,000 psi tensile strength and Rockwell C39 hardness deliver exceptional load-bearing capacity and resistance to wear and deformation.
- Fully threaded 10-32 UNF fine thread design offers maximum grip and holding power in thin materials or fine-pitch applications.
- Rounded button head profile presents a low-profile, smooth finish that minimizes snagging and improves safety.
- Compliance with ASME B18.3 and ASTM F835 guarantees consistent quality and interchangeability in regulated assemblies.
Professional Applications & Engineering Value
These 10-32 UNF Class 3A Black-Oxide Alloy Steel rounded head screws are engineered to address critical challenges in industrial fastening, such as vibration-induced loosening and tampering. The fine thread and Class 3A fit provide exceptional clamping force and precision alignment, ideal for machinery, electronics, and automotive components where reliability is paramount. The tamper-resistant hex drive adds a layer of security in public infrastructure or sensitive equipment, while the black-oxide coating on high-strength alloy steel resists rust and wear, ensuring long-term performance even in demanding conditions. This combination makes them a trusted choice for engineers seeking durability, security, and compliance in their assemblies.
Specification Summary & Compliance
This screw features a 10-32 UNF fine thread with Class 3A tolerance for high precision, a 3/8" length, and 5/32" tamper-resistant hex drive. It is manufactured from alloy steel with Rockwell C39 hardness and 130,000 psi tensile strength. The product complies with ASME B18.3 and ASTM F835 specifications, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safety and regulatory adherence.
