Summit Hydraulics Coupler Part Numbers: AG & FF Series Size Guide
Summit part numbers are easy once you know the pattern: letters = style, number = size, then M or F = male or female. Example: AG12M = ag style, 1/2", male. Find the part number stamped on the metal body of your coupler and type it in the box below, or use the chart. No number? Measure it instead.
Free Coupler Size Finder
Enter your part number or a measurement:
We'll tell you the size and the Tractor Relief Tool™ that fits. Searches 1,450+ part numbers.
- ✓Use the number stamped on the metal body of the coupler, not the hose. Hose printing (SAE 100R2, PSI, W.P.) won't match.
- ✓No part number? Measure across the male end (the plug, not the female socket) and type it, like 24.5 mm or 0.96 in. See how to measure →
- ✓Dashes, spaces and capitals don't matter (AG12M-08N = ag12m08n).
- ✓Can't read the whole number? Type the first few characters you can see.
Summit Coupler Size Chart
| The number after AG or FF | Your size is |
|---|---|
| 14 | 1/4" |
| 38 | 3/8" |
| 12 | 1/2" |
| 1 | 1" |
- AG = ag / Pioneer style (common on tractors). Same style as Pioneer.
- FF = flat face (common on skid steers).
M = male (the plug end). F = female (the socket it plugs into). "-B" at the end means ball valve. Same size. Ignore anything after the size (like 12GAS, 08N or 3/4-16 ORB). That's the hose thread, not the coupler size. Summit A- and B-series are different styles: use the search box.
Know your size now? Shop Tractor Relief Tools™ for Summit Couplers →
Common Summit Part Numbers and Sizes
| Part number | Size | Matching tool |
|---|---|---|
| AG12M-08N | 1/2" ag, male | 1/2" Ag / Pioneer Tool → |
| AG12M-08N-B | 1/2" ag, male | 1/2" Ag / Pioneer Tool → |
| AG12F-08N | 1/2" ag, female | 1/2" Ag / Pioneer Tool → |
| AG38M-06N | 3/8" ag, male | 3/8" Ag / Pioneer Tool → |
| AG14M-04N | 1/4" ag, male | 1/4" Ag / Pioneer Tool → |
| FF12M-08N | 1/2" flat face, male | 1/2" Flat Face Tool → |
| FF12F-12N | 1/2" flat face, female | 1/2" Flat Face Tool → |
Summit Coupler Won't Connect? Fix It in Seconds.
It's almost always pressure trapped in the disconnected half. The Tractor Relief Tool™ pushes onto the coupler, releases that pressure, and you reconnect. No hammer, no loosened fittings, no oil spray.
- Built for this one job. Lives in the cab.
- Steel, aluminum and stainless steel.
- Right Size Guarantee: easy exchange within 30 days.
Still not sure of your size? Search your part number or measurement:
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Powered by Tractor Relief Tool™. Summit Hydraulics is a brand of its owner. Tractor Relief Tool™ is not affiliated with Summit Hydraulics. Always confirm your size before ordering.
