Bolt strength classes!

Entenda a Classes de resistência de parafusos! Classes de resistência de parafusos Regra prática Conforme a DIN 931, o numero gravado geralmente na superfície superior da cabeça do parafuso, indica sua resistência (Ex.: 8.8). Logo, quanto maior for o numero gravado, maior será a resistência a tração do parafuso. Caso Ler mais

Is oil viscosity important?

Is oil viscosity important? SAE 5W-30, 10W-30, 15W-40. This numbering found on the packaging of lubricating oils represents the viscosity of each product. However, not everyone can understand what this classification is for: what do the numbers mean? And the letter “W”? And the acronym “SAE”? It is for Read more

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