Home / Welding Equipment / Welding Accessories / Hose Couplers/Fittings / Hose Nuts – “B” Fitting. Acetylene 9/16″ Hose Nuts – “B” Fitting. Acetylene 9/16″ $5.19 Part Number: 12287 Hose Nuts-“B” Acetylene 9/16″ 2 pcs. Hose Nuts - "B" Fitting. Acetylene 9/16" quantity Add to cart UPC: 682488122872 Category: Hose Couplers/Fittings Tag: B Fitting Acetylene 9/16" Related products Oxygen-Acetylene Hose Splicers. 3/16″ $6.55 Part Number: 12280Add to Cart Hose Nuts – “B” Fitting Oxygen – 9/16″ $5.19 Part Number: 12288Add to Cart Oxygen-Acetylene Hose Splicer Kit – 1/4″ $6.46 Part Number: 12286Add to Cart 2 PK Oxygen-Acetylene B-Size Barbed Hose Nipples. 3/16″ ID, 1-7/16″ Length $5.49 Part Number: 12276Add to Cart