BS A 303-1994 强度等级小于或等于1100 MPa的有涂层或无涂层短长度或中长度MJ螺纹的由金属材料制成的标称12角螺栓头标称杆螺栓.尺寸
Bolts, normal bihexagonal head, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1100 MPa - Dimensions
This International Standard specifies the dimensions of normal bihexagonal head bolts, with close or large tolerance normal shank, and short or medium length MJ threads, in metallic material, coated or uncoated, with strength classes less than or equal to 1 100 MPa.
It is intended for the drawing up of aerospace product standards.