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Solid brass industrial style Air Coupler Plug helps you quickly switch between different air tools and accessories. It is a must have air fittings for pneumatic tools, air compressors, air blow guns and air hoses etc. The industrial style, or industrial interchange, is compatible with M, D and I/M style couplers. The solid brass construction provides high corrosion resistance and prolong service span. Recommended to use Teflon tape.
| Body Size | Connecting Type | Part Number | Material |
| 1/4 | 1/4-18 NPT Male Thread | API22M | Brass, Steel, Aluminium |
| 1/4 | 1/4-18 NPT Female Thread | API22F | Brass, Steel, Aluminium |
| 1/4 | 3/8-18 NPT Male Thread | API23M | Brass, Steel |
| 1/4 | 3/8-18 NPT Female Thread | API23F | Brass, Steel |
| 1/4 | 1/4 Hose I.D., Barbed | API22H | Brass, Steel |
| 1/4 | 3/8 Hose I.D., Barbed | API23H | Brass, Steel |
| 3/8 | 1/4-18 NPT Male Thread | API32M | Brass, Steel |
| 3/8 | 1/4-18 NPT Female Thread | API32F | Brass, Steel |
| 3/8 | 3/8-18 NPT Male Thread | API33M | Brass, Steel |
| 3/8 | 3/8-18 NPT Female Thread | API33F | Brass, Steel |
| 3/8 | 1/2-14 NPT Male Thread | API34M | Brass, Steel |
| 3/8 | 1/2-14 NPT Female Thread | API34F | Brass, Steel |
| 3/8 | 3/8 Hose I.D., Barbed | API33H | Brass, Steel |
| 3/8 | 1/2 Hose I.D., Barbed | API34H | Brass, Steel |
| 1/2 | 3/8-18 NPT Male Thread | API43M | Steel |
| 1/2 | 3/8-18 NPT Female Thread | API43F | Steel |
| 1/2 | 1/2-14 NPT Male Thread | API44M | Steel |
| 1/2 | 1/2-14 NPT Female Thread | API44F | Steel |
| 1/2 | 3/4-14 NPT Male Thread | API46M | Steel |
| 1/2 | 3/4-14 NPT Female Thread | API46F | Steel |