Thread identification
SAE Code 62 Flange (SAE J518)
Code 62 is the 6,000 psi SAE 4-bolt flange series — same O-ring-on-pad principle as code 61, with heavier heads and wider bolt patterns for high-pressure spiral-hose mains.
Identify it
Four checks at the bench.
- 01
Four-bolt split flange with a noticeably thick flange head
- 02
Measure head OD: larger than code 61 at the same nominal size
- 03
Bolt spacing matches the 62 chart, not 61
- 04
Typically found on excavator main circuits and high-tonnage presses
Don't confuse it with…
- Code 61 hardware bolts up loosely to 62 pads on some sizes — a dangerous mismatch at 6,000 psi
- Caterpillar-style flanges are a heavier proprietary pattern again
Reference
Size chart.
| Size | Thread |
|---|---|
| 1/2" (head OD 1.25") | 6,000 psi |
| 3/4" (head OD 1.62") | 6,000 psi |
| 1" (head OD 1.88") | 6,000 psi |
| 1-1/4" (head OD 2.25") | 6,000 psi |
| 1-1/2" (head OD 2.62") | 6,000 psi |
| 2" (head OD 3.12") | 6,000 psi |
A1 stocks it.
- Code 62 Flange Head — StraightA1-4S-C62
- Code 62 Flange Head — 45°A1-4S-C62-45
- R15 Interlock Code 62 FlangeA1-6S-C62
- 6-Spiral Code 62 Flange — 90°A1-6S-C62-90
Unsure even after the checks? Bring the fitting to the counter — gauging an unknown thread takes us about a minute. (817) 589-7101.
SAE Code 62 Flange (SAE J518) — FAQs
Can I use code 61 clamps on a code 62 head?
No. Dimensions and ratings differ; a mixed stack may assemble but won't hold rated pressure safely. Match the series on every component.
Does A1 stock flange clamps and bolts?
Yes — split flange halves, bolts, and O-rings for both series, alongside the hose heads.