S-95345A035 4-40 x 7/8" ASME B18.13 Stainless Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer
Stainless Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Washer & Nut
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior vibration resistance through integrated 410 stainless steel internal-tooth lock washers that maintain clamping force under dynamic loads
- Excellent corrosion protection with passivated finish on both screw and washer, ideal for harsh industrial environments
- High tensile strength of 70,000 psi ensures reliable performance in demanding applications requiring robust fastening
- Precise Class 2A thread fit provides consistent engagement and reduces cross-threading risks during installation
- Optimized Phillips No. 1 drive offers efficient torque transfer while the pan head design provides substantial bearing surface
- Full threading along the 7/8" length allows for maximum adjustment flexibility and secure fastening at any point
- Dual-material construction combines 18-8 stainless steel screw with 410 stainless steel washer for comprehensive performance
Professional Applications & Engineering Value
These 4-40 UNC rounded head screws with integrated lock washers address critical vibration-induced loosening challenges in industrial assemblies. The 18-8 stainless steel construction provides excellent corrosion resistance while maintaining 70,000 psi tensile strength for high-stress applications. The internal-tooth lock washer design bites into both the bearing surface and screw head, creating permanent resistance to rotational forces in machinery, electronic enclosures, and automotive components. The passivated finish enhances surface durability while the coarse UNC threads ensure rapid installation in production environments. These fully threaded pan head screws with Phillips drive are engineered for applications where vibration resistance, corrosion protection, and reliable performance are paramount.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse threads (4-40 size) and 7/8" length. Complies with ASME B18.13 specifications for dimensional accuracy and performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards for environmental safety. Features 18-8 stainless steel screw body and 410 stainless steel internal-tooth lock washer, both with passivated finish for enhanced corrosion resistance.
