90112022 370 MPa Brass Bulkhead Coupling ISO9001 IATF16949 GB/T 5231 Quick Detail Product Name: Brass Bulkhead Coupling Fitting Shape: Straight Part No. 1: 901 12 022 Material Std: GB/T 5231 Quality: ISO9001, IATF16949 Tensile Strength: ≥ 370 MPa GB/T 5231 Brass, 370 MPa: The body is made from brass to the GB/T 5231 wrought copper alloy standard with a tensile strength of 370 MPa or more, so the thread and hex flats hold their shape under repeated tightening and line load.