Stressproof
Product of LaSalle Steel Co. A modified 1144 steel. Used to resist abrasion wear such as a shaft running in sand. 1/2" to 2-15/16" DIA. Full keyed and plain.

Strength Length
Tensile 132,000 PSI Any up to 12 FT.
Yield 100,000 PSI  
Wear ability without case  
Hardening hardness RC23  

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