| Standard | Size | Width Across Flats | Length |
| DIN6334 | M4 | 7mm | 12mm |
| M5 | 8mm | 15mm, 20mm |
| M6 | 8mm, 9mm, 10mm | 10mm, 15mm, 18mm, 20mm, 25mm, 30mm, 40mm |
| M7 | 9mm, 11mm | 15mm, 21mm, 25mm |
| M8 | 11mm, 12mm, 13mm, 14mm | 20mm, 24mm, 25mm, 28mm, 29mm, 30mm, 32mm, 40mm, 50mm |
| M9 | 11mm | 19mm |
| M10 | 13mm, 14mm, 17mm, 19mm | 20mm, 21mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm |
| M11 | 14mm | 24.5mm |
| M12 | 17mm, 19mm, 22mm | 20mm, 25mm, 30mm, 35mm, 36mm, 40mm, 45mm, 48mm, 50mm, 70mm |
| M13 | 17mm | 29mm |
| M14 | 19mm, 21mm, 22mm | 24mm, 25mm, 30mm, 38mm, 40mm, 42mm, 56mm |
| M15 | 19mm | 32mm |
| M16 | 22mm, 24mm | 30mm, 40mm, 48mm, 50mm, 60mm, 70mm |
| M18 | 27mm | 54mm |
| M20 | 30mm | 38mm, 50mm, 60mm, 80mm |
| M22 | 32mm | 66mm |
| M24 | 36mm | 50mm, 72mm, 80mm, 96mm |
| M27 | 41mm | 81mm |
| M30 | 46mm | 60mm, 90mm, 120mm |
| ANSI B18.2.2 | 1/4" | 3/8", 7/16" | 13/32", 3/4", 7/8", 1" |
| 5/16" | 3/8", 7/16", 15/32", 1/2" | 13/32", 7/8", 1", 1-3/16", 1-9/16", 1-3/4" |
| 3/8" | 1/2", 9/16", 5/8" | 1", 1-1/8", 1-3/16", 1-9/16", 1-3/4", 2" |
| 7/16" | 5/8", 11/16" | 1-3/4" |
| 1/2" | 5/8", 3/4", 11/16", 3/4" | 19/32", 1-1/4", 1-1/2", 1-9/16", 1-3/4", 2" |
| 5/8" | 1/2", 3/4", 13/16", 15/16" | 1", 1-3/16", 1-1/2", 1-29/32", 2", 2-1/8" |
| 3/4" | 15/16", 1", 1-3/32" | 1-1/4", 2", 2-1/4", 2-1/2", 2-9/16" |
| 7/8" | 1-1/8", 1-1/4", 1-5/16" | 1", 1-3/32", 1-1/8", 2-1/4", 2-1/2" |
| 1" | 1-1/4" | 2-1/2" |
| 1-1/8" | 1-5/8", 1-11/16" | 1-1/2", 3" |
| 1-1/4" | 1-5/8" | 3" |
| 1-1/2" | 2" | 4" |
