The GYROLOK Female Adapter converts a male pipe thread to a tube stub end so that any GYROLOK tube fitting of proper size can be connected. It has a female pipe thread on one end and a machined tube stub on the other, and comes in a fractional version for connecting to a male NPT thread (AF) and a metric tube version (AF/ME).


| Type | Female adapter AF (fractional tube, connects to male NPT thread) / AF/ME (metric tube, connects to male NPT thread) |
| Construction | Female pipe thread on one end / machined tube stub on the other |
| Fractional Part Numbers (AF) | 2AF2[ ] (tube 1/8" x NPT thread 1/8") / 2AF4[ ] (tube 1/8" x NPT thread 1/4") / 3AF2[ ] (tube 3/16" x NPT thread 1/8") / 3AF4[ ] (tube 3/16" x NPT thread 1/4") / 4AF2[ ] (tube 1/4" x NPT thread 1/8") / 4AF4[ ] (tube 1/4" x NPT thread 1/4") / 4AF6[ ] (tube 1/4" x NPT thread 3/8") / 4AF8[ ] (tube 1/4" x NPT thread 1/2") / 6AF2[ ] (tube 3/8" x NPT thread 1/8") / 6AF4[ ] (tube 3/8" x NPT thread 1/4") / 6AF6[ ] (tube 3/8" x NPT thread 3/8") / 6AF8[ ] (tube 3/8" x NPT thread 1/2") / 8AF4[ ] (tube 1/2" x NPT thread 1/4") / 8AF6[ ] (tube 1/2" x NPT thread 3/8") / 8AF8[ ] (tube 1/2" x NPT thread 1/2") / 10AF6[ ] (tube 5/8" x NPT thread 3/8") / 10AF8[ ] (tube 5/8" x NPT thread 1/2") / 10AF12[ ] (tube 5/8" x NPT thread 3/4") / 12AF8[ ] (tube 3/4" x NPT thread 1/2") / 12AF12[ ] (tube 3/4" x NPT thread 3/4") / 12AF16[ ] (tube 3/4" x NPT thread 1") / 14AF12[ ] (tube 7/8" x NPT thread 3/4") / 16AF8[ ] (tube 1" x NPT thread 1/2") / 16AF12[ ] (tube 1" x NPT thread 3/4") / 16AF16[ ] (tube 1" x NPT thread 1") / 20AF20[ ] (tube 1 1/4" x NPT thread 1 1/4") / 24AF24[ ] (tube 1 1/2" x NPT thread 1 1/2") / 32AF32[ ] (tube 2" x NPT thread 2") |
| Metric Part Numbers (AF/ME) | 3AF2[ ]ME (tube 3 mm x NPT thread 1/8") / 3AF4[ ]ME (tube 3 mm x NPT thread 1/4") / 6AF2[ ]ME (tube 6 mm x NPT thread 1/8") / 6AF4[ ]ME (tube 6 mm x NPT thread 1/4") / 6AF6[ ]ME (tube 6 mm x NPT thread 3/8") / 6AF8[ ]ME (tube 6 mm x NPT thread 1/2") / 8AF2[ ]ME (tube 8 mm x NPT thread 1/8") / 8AF4[ ]ME (tube 8 mm x NPT thread 1/4") / 8AF6[ ]ME (tube 8 mm x NPT thread 3/8") / 8AF8[ ]ME (tube 8 mm x NPT thread 1/2") / 10AF2[ ]ME (tube 10 mm x NPT thread 1/8") / 10AF4[ ]ME (tube 10 mm x NPT thread 1/4") / 10AF6[ ]ME (tube 10 mm x NPT thread 3/8") / 10AF8[ ]ME (tube 10 mm x NPT thread 1/2") / 12AF4[ ]ME (tube 12 mm x NPT thread 1/4") / 12AF6[ ]ME (tube 12 mm x NPT thread 3/8") / 12AF8[ ]ME (tube 12 mm x NPT thread 1/2") / 12AF12[ ]ME (tube 12 mm x NPT thread 3/4") / 14AF4[ ]ME (tube 14 mm x NPT thread 1/4") / 14AF8[ ]ME (tube 14 mm x NPT thread 1/2") / 15AF8[ ]ME (tube 15 mm x NPT thread 1/2") / 16AF6[ ]ME (tube 16 mm x NPT thread 3/8") / 16AF8[ ]ME (tube 16 mm x NPT thread 1/2") / 16AF12[ ]ME (tube 16 mm x NPT thread 3/4") / 18AF6[ ]ME (tube 18 mm x NPT thread 3/8") / 18AF8[ ]ME (tube 18 mm x NPT thread 1/2") / 18AF12[ ]ME (tube 18 mm x NPT thread 3/4") / 20AF8[ ]ME (tube 20 mm x NPT thread 1/2") / 20AF12[ ]ME (tube 20 mm x NPT thread 3/4") / 22AF8[ ]ME (tube 22 mm x NPT thread 1/2") / 22AF12[ ]ME (tube 22 mm x NPT thread 3/4") / 25AF8[ ]ME (tube 25 mm x NPT thread 1/2") / 25AF12[ ]ME (tube 25 mm x NPT thread 3/4") / 25AF16[ ]ME (tube 25 mm x NPT thread 1") |
| Part Number Rule | Fractional: first number = tube O.D., second number = NPT thread size (both in sixteenths of an inch) / metric: first number = tube O.D. in mm, second number = NPT thread size (in sixteenths of an inch) |
| Material (GYROLOK series) | Material code in the [ ] of the part number: brass BR, 304/304L stainless steel, 316/316L stainless steel, Monel M, Hastelloy C-276 HC, Duplex 2205 DX3, Inconel Alloy 625, Inconel Alloy 825, Super Duplex 2507 D50, titanium TI, 254 SMO 6MO (available materials may vary by fitting type and size) |