What happened with the 991R1 receptacles?

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the R2 replaced the R1. The style of the cam has changed to cause less wear on the cross pin.  The total height and the thickness of the material has slightly changed. Outside dimensions and fixation holes are the same. parts are compatible with studs and washers.
very old part number new part number
991R1-1AF 991R1-1AGV
991R1-1AG 991R1-1AGV
991R1-2AR 991R2-2AR
991R1-2AZ 991R2-2AZ
991R1-3AF 991R2-3AGV
991R1-4AF contact us, this is a version with dimpled holes
991R1-5AR contact us, this is a weldable version that is completely flat
991R1-5AZ contact us, this is a weldable version that is completely flat
991R1-3BP 991R2-3BP
991R1-1BP 991R2-1BP
991R1-1CP contact us, this is a stainless steel A4 version, you might use 991R2-3ASNV or 991R2-1BP as alternatives
 
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