S-93405A106 4-40 x 1/4" ASME B18.13 Steel Pan Head Phillips Screws with Split Lock Washer
Steel Pan Head Phillips Screws with Split Lock Washer
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Washer & Nut
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
- Reliable vibration resistance through integrated split lock washer that maintains clamping force under dynamic loads
- Optimized installation efficiency with Phillips No. 1 drive providing secure tool engagement and reduced cam-out risk
- Exceptional tensile strength rated at 60,000 psi ensures joint integrity under high-stress applications
- Precise thread engagement with Class 2A UNC coarse threads for faster assembly and reduced cross-threading
- Enhanced material durability with Rockwell B70 hardness providing excellent resistance to wear and deformation
- Complete thread coverage along the 1/4" length delivers maximum holding power across the entire fastener
Professional Applications & Engineering Value
These zinc-plated steel rounded head screws with integrated split lock washers provide critical vibration-resistant fastening solutions for industrial assemblies. The 4-40 UNC coarse thread configuration ensures rapid installation while maintaining Class 2A thread fit precision, reducing assembly time in high-volume manufacturing. The combination of 60,000 psi tensile strength and Rockwell B70 hardness makes these Phillips drive screws ideal for electronic enclosures, machinery panels, and automotive components where consistent clamping force and corrosion protection are essential. The fully threaded design maximizes contact surface area, preventing loosening in applications subject to thermal cycling or mechanical shock.
Specification Summary & Compliance
Manufactured to exacting ASME B18.13 specifications with Class 2A thread fit tolerances for consistent performance. Features UNC coarse threads (4-40) with right-hand orientation and complete compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The zinc-plated steel construction and split lock washer integration meet industrial requirements for corrosion resistance and vibration damping in mechanical fastening applications.
