Four Bolt Flange
SAE J518 and ISO 6162
Interchangeable with DIN 20066 and JIS B 8363, except for the bolt sizes. All Caterpillar® Flange dimensions are identical to Code 62 dimensions on this chart. The difference is the flange thickness. All CAT flange sizes have a flange thickness of 0.56″.
Sealing – An O-Ring, inserted into a ring groove in the flange head, seals on a smooth faced female port. It is held in place by two clamp halves and four bolts in a rectangular pattern.
| Port Size (inch) | Dash Size | Code 61 Bolt Spacing (inch) | Code 61 Flange Head Diameter (inch) | Code 62 Bolt Spacing (inch) | Code 62 Flange Head Diameter (inch) |
| 1/2 | -08 | 1-1/2 (1.50) | 1-3/16 (1.19) | 1-19/32 (1.59) | 1-1/4 (1.25) |
| 3/4 | -12 | 1-7/8 (1.88) | 1-1/2 (1.50) | 2 (2.00) | 1-5/8 (1.63) |
| 1 | -16 | 2-1/16 (2.06) | 1-3/4 (1.75) | 2-1/4 (2.25) | 1-7/8 (1.88) |
| 1-1/4 | -20 | 2-5/16 (2.31) | 2 (2.00) | 2-5/8 (2.63) | 2-1/8 (2.13) |
| 1-1/2 | -24 | 2-3/4 (2.75) | 2-3/8 (2.38) | 3-1/8 (3.13) | 2-1/2 (2.50) |
| 2 | -32 | 3-1/16 (3.06) | 2-13/32 (2.81) | 3-13/16 (3.81) | 3-1/8 (3.13) |
| 2-1/2 | -40 | 3-1/2 (3.50) | 3-5/16 (3.31) | – | – |
| 3 | -48 | 4-3/16 (4.19) | 4 (4.00) | – | – |
| 3-1/2 | -56 | 4-3/5 (4.75) | 4-1/2 (4.53) | – | – |
| 4 | -64 | 5-1/8 (5.12) | 5 (5.03) | – | – |
| Size | SAE | Flange Thickness (in) | O-Ring |
| -8 | Code 61 | 0.265 | 210 |
| -12 | Code 61 | 0.265 | 214 |
| -16 | Code 61 | 0.315 | 219 |
| -20 | Code 61 | 0.315 | 222 |
| -24 | Code 61 | 0.315 | 225 |
| -32 | Code 61 | 0.375 | 228 |
| -40 | Code 61 | 0.375 | 232 |
| -48 | Code 61 | 0.375 | 237 |
| -8 | Code 62 | 0.305 | 210 |
| -12 | Code 62 | 0.345 | 214 |
| -16 | Code 62 | 0.375 | 219 |
| -20 | Code 62 | 0.405 | 222 |
| -24 | Code 62 | 0.495 | 225 |
| -32 | Code 62 | 0.495 | 228 |
| CAT | CAT | (All Sizes) 0.560 | – |