S-95345A037 4-40 x 1" 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
- Vibration-resistant locking with integrated internal-tooth lock washer prevents loosening in dynamic applications
- Exceptional corrosion resistance through 18-8 stainless steel construction and passivated surface treatment
- High-strength performance with 70,000 psi tensile strength for demanding industrial applications
- Reliable coarse threading (UNC 4-40) ensures quick assembly and superior holding power
- Secure Phillips No. 1 drive provides positive engagement and reduces cam-out during installation
- Full threading along the entire 1" length maximizes grip and load distribution
- Regulatory compliance meets ASME B18.13 standards with RoHS 3 and REACH environmental requirements
Professional Applications & Engineering Value
These 4-40 UNC rounded head Phillips screws with integrated internal-tooth lock washers solve critical vibration-induced loosening problems in industrial equipment, electronic enclosures, and machinery assemblies. The 18-8 stainless steel construction combined with passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for harsh environments. The coarse thread design ensures rapid installation while maintaining strong holding power, while the 410 stainless steel lock washer creates permanent vibration resistance without compromising the corrosion protection. These fully threaded screws deliver maximum thread engagement for superior load distribution across the entire 1" length, preventing stress concentration points in critical assemblies.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC 4-40 coarse threads and right-hand threading direction. Complies with ASME B18.13 manufacturing specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. Features include 0.219" head diameter, pan head style, and integrated internal-tooth lock washer with 0.268" OD and 0.018" thickness.
