Normas - Engenharia Projetos e Construção
A490M - Standard Specification for High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural Steel Joints [Metric] A490 - Standard Specification for Heat-Treated Steel Structural Bolts, 150 ksi Minimum Tensile Strength A491 - Standard Specification for Aluminum-Coated Steel Chain-Link Fence Fabric
اقرأ المزيد