... .LengthWeightWrench Flat(L×W)SM ThicknessSM ALLOY5/8”38.1mm23.81mm101.6mm0.56kg31.8×34.9mm0.254~0.508mmNi60A/Ni60B Place ... of OriginShandong, China (Mainland)Brand NameYUNSHENGModel NumberAPI 11B 5/8" SM FS ROD COUPLINGMATERIALALLOY STEEL BAR, AISI 5140OUT DIAMETER38. ... TYPEFULL SIZE, SLIM HOLE, OVER SIZETHREAD SIZES5/8", 3/4", 7/8", 1", 1.1/8"USAGEJOINNING TWO SUCKER RODS TOGETHER FOR DOWNHOLEOIL ...