Basic Info.

Product Description

Api class sm coupling 1)type: sm fs and sh coupling 2)coupling diameter: 5/8 ",3/4",7/8",1",1-1/8" 3)weight: 0.41-1.29 kg/pcs 4)material: aisi 5i40 5)spray material:ni60a alloy coating 6)sm thickness:0.01-0.02in 7) basic hardness: hrc 16-23 8)surface hardness: hrc 55-62 9)hole rate: <2% 10)min. hardness of the layer: 595hv0.2 11) operating temperature: -1000~400? 12) life: > 180 days 13)standard: api spec 11b 14)package: wooden case 15)payment terms: t/t our new products 1) sm coupling with great bevel edge 2) two-way cambered protection coupling