(6-4)DNA photolyase, 6×4, South African Class 6 4-6-0, 4-6-2, BR Standard Class 4 4-6-0, 4-6-4, South African Class C 4-6-0T, HK 4.6×30mm, Zurich 4 and 6, SBB Be 4/6 12303-12342, South African Class C1 4-6-2T, South African Class E 4-6-4T, South African Class 2 4-6-2, PPR 35 Tonner 4-6-0T Portuguese, 4-6-4+4-6-4, Mehrabad Airport Terminal 4 and 6 station, CGR NG 4-6-2T, South African Class C2 4-6-4T, South African Class 6G 4-6-0, 25 or 6 to 4, South African Class 2C 4-6-2, South African Class 5B 4-6-2, Matthew 11:4–6, South African Class 6C 4-6-0, South African Class 6F 4-6-0, South African Class 6J 4-6-0, South African Class 6Z 2-6-4, SBB Be 4/6 12302, South African Class 6D 4-6-0, South African Class 6L 4-6-0, CSAR Rack 4-6-4RT, 2-amino-4-hydroxy-6-hydroxymethyldihydropteridine diphosphokinase, South African Class 6K 4-6-0, South African Class 10A 4-6-2, Römer 2-4-6, South African Class 10C 4-6-2, 6/4, Chondro-6-sulfatase, Bernina Railway Ge 6/6 81, CGR 5th Class 4-6-0 1890, South African Class 5A 4-6-2

4-6-0, SBB Be 4/6 12301, Matthew 4:6, South African Class 10 4-6-2, South African Class 6H 4-6-0, 4-4-6, Metropolitan & Suburban 4-6-2T, NGR Class N 4-6-2T 1906, South African Class Experimental 1 4-6-2, 4-6-2+2-6-4, Order-6-4 triangular honeycomb, CGR 5th Class 4-6-0 1891, 0-6-4T, 4-6-0+0-6-4, TDP-4-oxo-6-deoxy-alpha-D-glucose-3,4-oxoisomerase (dTDP-3-dehydro-6-deoxy-alpha-D-glucopyranose-forming), 6-APDB, South African Class NG3 4-6-2T, South African Class 6A 4-6-0, Baldwin DR-6, 4-6-4-4, CGR 4th Class 4-6-0TT 1882 Joy, South African Class 16 4-6-2, South African Class 6B 4-6-0, Tornado outbreak of January 4–6, 1946, South African Class 10B 4-6-2, South African Class F 4-6-4T, TDP-4-oxo-6-deoxy-alpha-D-glucose-3,4-oxoisomerase (dTDP-3-dehydro-6-deoxy-alpha-D-galactopyranose-forming), South African Class 6E 4-6-0, (Z)-6-Dodecen-4-olide, CGR 4th Class 4-6-0TT 1882, BR Standard Class 4 2-6-0 76084, South African Class 9 4-6-2, 4.6×36mm, 4-6-6-4, 5,7-Dihydroxy-6-methoxy-2-(4-phenoxyphenyl)chromen-4-one, South African Class 10D 4-6-2, 2-6-4, CGR 4th Class 4-6-0TT 1884, South African Class 5 4-6-2, 6+4 Cycloaddition, 6-Hydroxy-3-succinoylpyridine 3-monooxygenase, BR Standard Class 4 2-6-0, 4/6, Chalcone 4'-O-glucosyltransferase, SBB Ae 4/6, 2,5-Diamino-6-hydroxy-4-(5-phosphoribosylamino)pyrimidine, GDP-6-deoxy-D-talose 4-dehydrogenase, 6-Hydroxypseudooxynicotine dehydrogenase, LMS Stanier Class 5 4-6-0 4806, Order-6-4 square honeycomb

(6-4)DNA photolyase, 6×4, South African Class 6 4-6-0, 4-6-2, BR Standard Class 4 4-6-0, 4-6-4, South African Class C 4-6-0T, HK 4.6×30mm, Zurich 4 and 6, SBB Be 4/6 12303-12342, South African Class C1 4-6-2T, South African Class E 4-6-4T, South African Class 2 4-6-2, PPR 35 Tonner 4-6-0T Portuguese, 4-6-4+4-6-4, Mehrabad Airport Terminal 4 and 6 station, CGR NG 4-6-2T, South African Class C2 4-6-4T, South African Class 6G 4-6-0, 25 or 6 to 4, South African Class 2C 4-6-2, South African Class 5B 4-6-2, Matthew 11:4–6, South African Class 6C 4-6-0, South African Class 6F 4-6-0, South African Class 6J 4-6-0, South African Class 6Z 2-6-4, SBB Be 4/6 12302, South African Class 6D 4-6-0, South African Class 6L 4-6-0, CSAR Rack 4-6-4RT, 2-amino-4-hydroxy-6-hydroxymethyldihydropteridine diphosphokinase, South African Class 6K 4-6-0, South African Class 10A 4-6-2, Römer 2-4-6, South African Class 10C 4-6-2, 6/4, Chondro-6-sulfatase, Bernina Railway Ge 6/6 81, CGR 5th Class 4-6-0 1890, South African Class 5A 4-6-2, 4-6-0, SBB Be 4/6 12301, Matthew 4:6, South African Class 10 4-6-2, South African Class 6H 4-6-0, 4-4-6, Metropolitan & Suburban 4-6-2T, NGR Class N 4-6-2T 1906, South African Class Experimental 1 4-6-2, 4-6-2+2-6-4, Order-6-4 triangular honeycomb, CGR 5th Class 4-6-0 1891, 0-6-4T, 4-6-0+0-6-4, TDP-4-oxo-6-deoxy-alpha-D-glucose-3,4-oxoisomerase (dTDP-3-dehydro-6-deoxy-alpha-D-glucopyranose-forming), 6-APDB, South African Class NG3 4-6-2T, South African Class 6A 4-6-0, Baldwin DR-6, 4-6-4-4, CGR 4th Class 4-6-0TT 1882 Joy, South African Class 16 4-6-2, South African Class 6B 4-6-0, Tornado outbreak of January 4–6, 1946, South African Class 10B 4-6-2, South African Class F 4-6-4T, TDP-4-oxo-6-deoxy-alpha-D-glucose-3,4-oxoisomerase (dTDP-3-dehydro-6-deoxy-alpha-D-galactopyranose-forming), South African Class 6E 4-6-0, (Z)-6-Dodecen-4-olide, CGR 4th Class 4-6-0TT 1882, BR Standard Class 4 2-6-0 76084, South African Class 9 4-6-2, 4.6×36mm, 4-6-6-4, 5,7-Dihydroxy-6-methoxy-2-(4-phenoxyphenyl)chromen-4-one, South African Class 10D 4-6-2, 2-6-4, CGR 4th Class 4-6-0TT 1884, South African Class 5 4-6-2, 6+4 Cycloaddition, 6-Hydroxy-3-succinoylpyridine 3-monooxygenase, BR Standard Class 4 2-6-0, 4/6, Chalcone 4'-O-glucosyltransferase, SBB Ae 4/6, 2,5-Diamino-6-hydroxy-4-(5-phosphoribosylamino)pyrimidine, GDP-6-deoxy-D-talose 4-dehydrogenase, 6-Hydroxypseudooxynicotine dehydrogenase, LMS Stanier Class 5 4-6-0 4806, Order-6-4 square honeycomb, South African Class GF 4-6-2+2-6-4, Fructose-6-phosphate phosphoketolase, DTDP-6-deoxy-L-talose 4-dehydrogenase, South African Class Experimental 6 4-8-0, CGR 4th Class 4-6-0TT 1880, 4, 5 and 6, N-acetylgalactosamine-6-sulfatase, South African Class GH 4-6-2+2-6-4, Olympus Zuiko Digital ED 9-18mm f/4-5.6, GDP-4-dehydro-6-deoxy-D-mannose reductase, 6-4-4-6, Chondro-4-sulfatase, N-acetylgalactosamine-4-sulfatase, South African Class NG4 4-6-2T, 4-6-6-2, DTDP-6-deoxy-L-talose 4-dehydrogenase (NAD+), South African Class NG8 4-6-0, 4-4-6-4, 2-6-6-4, DTDP-dihydrostreptose—streptidine-6-phosphate dihydrostreptosyltransferase, Diamond T 4-ton 6×6 truck, Konica Minolta AF Zoom DT 11-18mm f/4.5-5.6 (D), DTDP-L-rhamnose 4-epimerase, 2-4-6T, SBB Am 4/6 1101, Special Herbs, Vols. 4, 5 & 6, Réseau Breton 4-6-0 tank locomotives, 2-Amino-4-hydroxy-6-pyrophosphoryl-methylpteridine, 6-methylsalicylate decarboxylase, BCDR 4-6-4T, 2-hydroxy-4-carboxymuconate semialdehyde hemiacetal dehydrogenase, 6-Hydroxyflavone, Glycoprotein 6-alpha-L-fucosyltransferase, LMS 2 and 2A boilered 4-6-0 locomotives, 2,5-diamino-6-(ribosylamino)-4(3H)-pyrimidinone 5'-phosphate reductase, UDP-4-amino-4-deoxy-L-arabinose aminotransferase, Cadillac V8 engine, 4-chlorobenzoate—CoA ligase, Hebrews 6, Bavarian S 3/6, BR Standard Class 4 2-6-4T, Methylquercetagetin 6-O-methyltransferase, DTDP-4-amino-4,6-dideoxy-D-glucose transaminase, 4-hydroxybenzoate—CoA ligase, 6-Pyruvoyltetrahydropterin synthase, N-acetylmuramic acid 6-phosphate etherase, List of tornadoes in the outbreak of May 4–6, 2007, 4-phosphopantoate—beta-alanine ligase, 4-hydroxyglutamate transaminase, L&YR Hughes 4-6-4T, CDP-4-dehydro-6-deoxyglucose reductase, Matthew 6:4, DTDP-4-dehydrorhamnose reductase, 4-Coumarate-CoA ligase, Trehalose 6-phosphate phosphorylase, N-acetylgalactosamine 4-sulfate 6-O-sulfotransferase, 4-chlorobenzoate dehalogenase, Lysine 6-dehydrogenase, Ezra 4, 2-amino-5-formylamino-6-ribosylaminopyrimidin-4(3H)-one 5'-monophosphate deformylase