| http://www.w3.org/ns/prov#value | - The inner diameter ofthe collar 20 is slightly greater than the outer diameter of section 16A and slightly less than the diameter of the annular shoulder 19.The stem 16 is formed of relatively hard material, such as 7075 or 2024 aluminum, Monel metal, A286 high-temperature stainless, carbon steel, or other suitable materials.
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