S-93310A255 10-32 x 1/4" ASME B18.3, ASTM F879, MIL-DTL-18240 Thread-Locking Stainless Steel Button Head Hex-Drive Screws
Thread-Locking Stainless Steel Button Head Hex-Drive 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
- Permanent vibration resistance with nylon patch locking, ensuring reliable performance in high-stress environments
- Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial and outdoor applications
- High tensile strength of 70,000 psi provides exceptional load-bearing capacity for critical assemblies
- Precise Class 3A thread fit delivers secure, tight fastening with minimal risk of loosening
- Wide temperature tolerance from -70° to 250°F maintains integrity in extreme thermal conditions
- Hex drive design allows for easy installation and high torque application without slippage
- Rounded button head profile offers a low-profile, aesthetically pleasing finish while reducing snagging risks
Professional Applications & Engineering Value
Engineered for demanding environments, these 10-32 UNF nylon patch locking screws address common industrial challenges such as vibration-induced loosening and corrosion. The 18-8 stainless steel material ensures longevity in moist or chemically aggressive settings, while the fine thread spacing and Class 3A fit provide superior clamping force and alignment precision. The nylon patch thread locker creates a permanent bond that withstands cyclic loads, making these fasteners ideal for automotive control systems, aerospace instrumentation, and heavy machinery assemblies. Their compliance with ASME B18.3, ASTM F879, and MIL-DTL-18240 standards guarantees consistent quality and reliability in mission-critical applications.
Specification Summary & Compliance
This rounded head screw features a 10-32 UNF fine thread with Class 3A precision fit, ensuring exact dimensional accuracy per unified thread standards. Manufacturing adheres to ASME B18.3, ASTM F879, and MIL-DTL-18240 specifications, with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The nylon patch locking mechanism operates effectively across a -70° to 250°F temperature range, while the Rockwell B55 hardness and 70,000 psi tensile strength validate its durability under mechanical stress.
