Chain Part#	Pitch (inches)	Plat Lacing	Overall Width (F)	Pin Diameter (A)	Plate Height (H)	Plate Thickness (T)	Bearing Area Square Inches	Weight Per ft. Pounds Average	Average Tensil Strength Pounds	Connecting Link Part#
BL421	1/2	2x1	0.331	0.200	0.475	0.080	0.016	0.26	2,500	BL421-CL
BL422	1/2	2x2	0.413	0.200	0.475	0.080	0.021	0.37	5,000	BL422-CL
BL423	1/2	2x3	0.496	0.200	0.475	0.080	0.047	0.48	6,100	BL423-CL
BL434	1/2	3x4	0.657	0.200	0.475	0.080	0.063	0.65	9,200	BL434-CL
BL444	1/2	4x4	0.735	0.200	0.475	0.080	0.063	0.76	10,000	BL444-CL
BL446	1/2	4x6	0.898	0.200	0.475	0.080	0.095	0.93	12,200	BL446-CL
BL466	1/2	6x6	1.055	0.200	0.475	0.080	0.095	1.11	14,000	BL466-CL
BL521	5/8	2x1	0.394	0.234	0.594	0.094	0.022	0.41	3,800	BL521-CL
BL522	5/8	2x2	0.484	0.234	0.594	0.094	0.044	0.57	7,500	BL522-CL
BL523	5/8	2x3	0.591	0.234	0.594	0.094	0.066	0.73	9,000	BL523-CL
BL534	5/8	3x4	0.783	0.234	0.594	0.094	0.088	1.01	13,600	BL534-CL
BL544	5/8	4x4	0.878	0.234	0.594	0.094	0.088	1.12	15,000	BL544-CL
BL546	5/8	4x6	1.071	0.234	0.594	0.094	0.133	1.40	18,000	BL546-CL
BL566	5/8	6x6	1.264	0.234	0.594	0.094	0.133	1.68	21,000	BL566-CL
BL622	3/4	2x2	0.646	0.312	0.713	0.125	0.079	0.90	12,000	BL622-CL
BL623	3/4	2x3	0.783	0.312	0.713	0.125	0.118	1.18	13,600	BL623-CL
BL634	3/4	3x4	1.039	0.312	0.713	0.125	0.157	1.63	20,400	BL634-CL
BL644	3/4	4x4	1.165	0.312	0.713	0.125	0.157	1.84	24,000	BL644-CL
BL646	3/4	4x6	1.421	0.312	0.713	0.125	0.236	2.30	27,200	BL646-CL
BL666	3/4	6x6	1.685	0.312	0.713	0.125	0.236	2.76	35,000	BL666-CL
BL822	1	2x2	0.807	0.375	0.950	0.156	0.118	1.41	20,000	BL822-CL
BL823	1	2x3	0.969	0.375	0.950	0.156	0.177	1.81	23,000	BL823-CL
BL834	1	3x4	1.287	0.375	0.950	0.156	0.236	2.51	34,900	BL834-CL
BL844	1	4x4	1.449	0.375	0.950	0.156	0.236	2.85	40,100	BL844-CL
BL846	1	4x6	1.760	0.375	0.950	0.156	0.354	3.55	46,100	BL846-CL
BL866	1	6x6	2.087	0.375	0.950	0.156	0.354	4.25	53,100	BL866-CL
BL1022	1 1/4	2x2	0.961	0.437	1.188	0.187	0.165	2.03	29,500	BL1022-CL
BL1023	1 1/4	2x3	1.154	0.437	1.188	0.187	0.248	2.65	32,100	BL1023-CL
BL1034	1 1/4	3x4	1.543	0.437	1.188	0.187	0.330	3.68	50,200	BL1034-CL
BL1044	1 1/4	4x4	1.728	0.437	1.188	0.187	0.330	4.18	59,000	BL1044-CL
BL1046	1 1/4	4x6	2.110	0.437	1.188	0.187	0.496	5.21	64,200	BL1046-CL
BL1066	1 1/4	6x6	2.492	0.437	1.188	0.187	0.496	6.25	82,200	BL1066-CL
BL1223	1 1/2	2x3	1.350	0.500	1.425	0.219	0.330	3.69	41,100	BL1223-CL
BL1234	1 1/2	3x4	1.783	0.500	1.425	0.219	0.440	5.12	66,700	BL1234-CL
BL1244	1 1/2	4x4	1.840	0.500	1.430	0.230	0.550	6.25	68,750	BL1244-CL
BL1246	1 1/2	4x6	2.457	0.500	1.425	0.219	0.661	7.24	82,300	BL1246-CL
BL1423	1 3/4	2x3	1.524	0.562	1.663	0.250	0.425	5.07	52,200	BL1423-CL
BL1434	1 3/4	3x4	2.035	0.562	1.663	0.250	0.567	7.03	76,900	BL1434-CL
BL1446	1 3/4	4x6	2.795	0.562	1.663	0.250	0.850	10.00	104,300	BL1446-CL
BL1634	2	3x4	2.100	0.690	1.900	0.300	0.860	9.41	100,091	BL1634-CL
BL1644	2	4x4	2.400	0.690	1.900	0.300	0.980	10.75	131,431	BL1644-CL
BL1646	2	4x6	3.000	0.690	1.900	0.300	1.180	13.44	131,431	BL1646-CL
BL1666	2	6x6	3.600	0.690	1.900	0.300	1.240	16.13	194,863	BL1666-CL
BL1688	2	8x8	4.800	0.690	1.900	0.300	1.360	21.50	262,841	BL1688-CL