S-92929A137 4-40 x 5/8" ASME B18.6.3 Plastic Slotted Flat Head Screws
Plastic Slotted Flat 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
- Corrosion-resistant nylon construction eliminates rust and galvanic corrosion in sensitive environments
- Wide temperature tolerance (-40° to 185°F) ensures reliable performance in both extreme cold and moderate heat applications
- 100° countersink angle with flat head design provides flush mounting for improved aesthetics and safety
- Class 2A coarse UNC threading delivers faster assembly and superior vibration resistance in plastic and soft materials
- Full thread engagement along 5/8" length maximizes holding power and distribution of load forces
- Slotted drive compatibility offers simple installation with standard screwdrivers for maintenance flexibility
- Regulatory compliance package meets ASME B18.6.3, RoHS 3 and REACH standards for global industrial acceptance
Professional Applications & Engineering Value
These 4-40 UNC flat head slotted nylon screws solve critical challenges in electrical enclosures, medical devices, and food processing equipment where metal fasteners cause contamination or short-circuit risks. The nylon plastic material provides excellent dielectric properties while resisting chemicals and moisture. The coarse UNC threading with Class 2A fit prevents stripping in soft substrates and maintains secure fastening under vibration. The 100° countersink angle creates seamless surfaces that won't snag wiring or interfere with moving components. Ideal for temperature-resistant applications ranging from freezer assemblies to moderately heated industrial controls.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread tolerances ensuring precise fit and interchangeability. The 4-40 UNC coarse thread profile with right-hand direction and full threading provides consistent engagement depth. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for restricted substance control. Standard flat head profile with 0.225" head diameter and 5/8" length maintains dimensional consistency across production batches.
