These are low carbon-steel fasteners that have not been heat-treated.
{"sku":"SKU|PM04432","spec_notab_51_weight":"Weight|0.0218 Pound","spec_notab_thread_type":"Thread Type|Coarse","spec_notab_512_middle_dimension":"Middle Package Dimension|2.9528 Inch","spec_notab_511_largest_dimension":"Largest Package Dimension|4.7236 Inch","promoted_feature_entity_attribute":"Promoted Features|RDO Promise","spec_notab_513_smallest_dimension":"Smallest Package Dimension|0.1969 Inch","part_cdk_id":"Part ID|13196020","spec_notab_size":"Size|5/8-11 x 4","part_cdk_company":"Company|01","part_cdk_division":"Division|01","part_cdk_type_code":"Type Code|12","part_cdk_list_price":"List Price|12.93","part_cdk_part_class":"Part Class|28D","part_cdk_branch_code":"Branch Code|99","part_cdk_branch_name":"Branch Name|Fargo FSO","part_cdk_description":"CDK Description|SHAFT KEY","part_cdk_part_number":"Part Number|PM04432","part_cdk_part_source":"Part Source|N ","part_cdk_part_status":"Part Status|A","part_cdk_vendor_code":"Vendor Code|DEERE","part_cdk_vendor_name":"Vendor Name|JOHN DEERE","part_cdk_product_line":"Product Line|AGXXXX"}