S-91475A384 0.141" ID x 0.25" OD ASME B18.21.1; MS35338-136 Mil. Spec. Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress environments, ensuring long-term joint integrity
• Exceptional corrosion resistance from Black-Oxide 316 Stainless Steel construction maintains performance in harsh, corrosive conditions
• Optimized dimensional precision with 0.141" ID and 0.25" OD provides perfect fit for No. 6 screws, eliminating installation issues
• Enhanced durability through Rockwell C35 hardness rating withstands repeated loading cycles without deformation
• Industry-standard compliance with ASME B18.21.1 and MS35338-136 ensures reliable performance and interchangeability
• Environmental regulation adherence with RoHS 3 and REACH compliance meets global manufacturing requirements
• Reliable locking action from standard split design creates continuous spring tension against both fastener and surface

Professional Applications & Engineering Value

These Black-Oxide 316 Stainless Steel split lock washers deliver critical vibration-resistant fastening solutions for demanding industrial applications. The combination of high-grade stainless steel material and specialized black-oxide surface treatment provides exceptional corrosion protection in marine, chemical processing, and outdoor environments where moisture and corrosive elements threaten fastener integrity. Engineered specifically for No. 6 screw sizes, these washers address common vibration-induced loosening problems in machinery, electrical enclosures, and automotive assemblies. The standard split lock design generates consistent spring tension that compensates for thermal expansion, material relaxation, and dynamic loads, maintaining clamp force where traditional flat washers fail. This makes them ideal for precision equipment, vibration-prone machinery, and critical assemblies requiring reliable long-term fastening security.

Specification Summary & Compliance

This split lock washer features precise inch-dimension specifications with 0.141" internal diameter, 0.25" outer diameter, and 0.031" thickness, engineered for optimal performance with No. 6 screw sizes. Manufacturing complies with ASME B18.21.1 dimensional standards and MS35338-136 military specifications, ensuring consistent quality and performance. The product maintains full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations concerning chemical substances, meeting the latest environmental and safety standards for industrial applications worldwide.