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BSP Welding Nipple - Tapered / Rated- A4 (T316) Marine Grade Stainless Steel - Taper Threads (BSPT / R Thread). The ISO 7 tapered Whitworth threads are equivalent to DIN 2999, BS 21 (BS EN 10226-1), JIS B0203.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.