can you help with General Electric camloc parts?

Yes we can. 91-S53-9-1AA   ; (same as for: 91-S53-8-1AA , 91-S53-24-1AA) This is a slotted head. The part that we offer needs a slightly smaller tool to open the fastener. Ours measure 13mm ; yours measure 9/16. (if you want we can have that made with 9/16 but then parts will be supplied without certs, as they are then manufactured by our subcontractor) The only thing that is not mentioned on your drawings is the material.  I do think however that yours are cadmium plated. Ours are steel zinc plated or stainless steel. The part number that is your perfect match would be 991S01-9-1AGV, 991S01-8-1AGV , 991S01-24-1AGV   91-S53-24-2AA This part is an offset wing head Which means compatible part number would be 991S03-24-1AGV take care: the difference looks like the plating. finish is immersion zinc flake / chromate dispersion per mil- c-67115 class 2 this looks to be a coating that is resistant to 1000 hours salt spray test. our AGV parts have a resistance of 240 hours. we can offer also ASNV parts with a resistance of 720 hours   We can offer a coating that is zinc flake coated, plating would be done not by anemo 2000 hours! With a thickness of 10-12 µm (thanks to it’s limited thickness it’s ideal for fasteners as exact fit is guaranteed) another advantage is that the mechanical properties of the fasteners are not influenced, as the parts get only a heat treatment of maximum 250°C it is also chrome VI free please communicate which process you want: dip spin , spray or dip-drain and if accepted by the customer also tell me the full quantity?