Earls 1/8 NPT Female Tee - AT991701ERL vacuum-pumps The two different valves are

The two different valves are identical on the outside but have a different thread pitch

The aluminum piece is anodized black and the stainless piece is electropolished to provide corrosion resistance and the APR logo is laser etched on each side

Cab Size Crew Cab

4 V8 1976 - 1978 GMC C15 400/6

Each gauge is tested to insure a top quality and accurate gauge

Earls 1/8 NPT Female Tee - AT991701ERL vacuum-pumps The two different valves areOverview: Black Anodized Lightweight Aluminum Construction. Available for Any Plumbing Situation And Many Custom Applications. Features: Fitting seals on the threads. Must use PTFE tape or sealing compound during assembly. DO NOT overtorque. Application: Year Make Model Submodel Engine Size Universal Specs: Adapter NPT Size ( A ) 1 8 NPT FEMALE Adapter NPT Size ( B ) 1 8 NPT FEMALE Adapter NPT Size ( C ) 1 8 NPT FEMALE Adapter Type Female Tee Brand