BOMCOO 200 Pcs 5/16" Spring Lock Washers, 18-8(304) Stainless Steel, ASME B18.21.1 Compliant, Anti-Loosing Split Lock Washers for US Industrial Automotive Machinery High-Vibration Equipment

["✅【Premium 304 Steel & ASME Compliant Precision】18-8(304) stainless steel spring washers with precision forming process, strictly meeting ASME B18.21.1 industry standards for US fastener dimensional accuracy. Superior rust, corrosion and moisture resistance, ideal for damp indoor/outdoor industrial and high-vibration working environments.Non-brittle, durable with stable locking performance, cutting replacement costs notably.","✅【Precision UNC Fit & Anti-Loosing Under Vibration】5/16\" UNC standard size, perfectly matching 5/16\" bolts/nuts. Unique spring structure provides continuous elastic pressure,effectively preventing bolt/nut loosening caused by equipment vibration or thermal expansion.Precision formed edges ensure tight engagement without damaging bolt threads.","✅【200Pcs Full Quantity Bulk Pack & QC Verified Quality】200pcs exact quantity with no shortage, factory QC inspected for consistent premium grade, tailored for US garages,renovation teams, small workshops and industrial bulk procurement. Pure 1/4-20 UNC imperial sizing, with 10+ common fastener sizes available in-store, one purchase fulfills long term use needs.","✅【Universal Fit for US High-Vibration Professional Scenarios】ASME-compliant 5/16\" UNC specification, widely suited for industrial machinery fixing, automotive engine components,high-vibration equipment assembly, commercial construction, electrical maintenance and fastener anti-loosening projects. A core accessory for US professional workers and small business procurement.","✅【Consistent Quality Guarantee & Worry-Free After-Sales】Guaranteed uniform premium quality and perfect dimensional fit for professional fastening applications. Upgraded 24/7 after sales support covers free return, exchange or replacement for genuine dimension, material or quantity shortage issues. 100% satisfaction promise for your professional purchase."]