Material: 
Body, shield and ball stud 230 M07 Pb leaded low carbon steel equivalent 9S Mn Pb 28K, tensile strength 430-500N/mm².
Spring 302 S 26 Stainless Steel..
Protective Finish:
Body, shield and ball stud Zinc plated and yellow passivated; body and ball stud de-embrittled. The assembly is lubricated.

QI  Ball Joint:

• SAE J490 Style 1 - deatachable ball joints.
• The spring loaded outer shield allows both rapid release and reconnection of the ball stud. Linkage assemblies can be installed or removed without disturbing pre-set centres.
• QI Ball Joint is avalible without integral ball stud for assembly to a pre-positioned ball stud. The ball studs are also avalible separately.
• Hexagon form of studs facilitates assembly.
• Knurled shields, to assist grip, will be introduced to eventually become standard to all sizes.
• Metric sizes of this range are shown on Data Sheet QM.
• Subject to quantity, special threaded bodies and ball studs are avalible.