What is the fine-grained topic of the following text: The Studs Are Manufactured From 87 40 Chrome Moly Steel, Heat-tre ated In-house To 200,000 Psi T ensile Strength, And Precision J-form Threads Rolled After H eat-treat To Create A Fastener That Has Threads 1000% Strong er Than Others. Only return the topic.
Manufacturing Process of Chrome Moly Steel Studs