Muellar 511-918BC Pipe Reducing Hexagonal Bushing, 4" x 2", Threaded, Galvanized BESTSELLERS 1/2" reduced shank

1/2" reduced shank

Fastener length: 1-1/4" - 2-1/2"

The ingenious design actually forces the louver blades to pivot

5/16 Inch Socket Drive

Muellar 511-918BC Pipe Reducing Hexagonal Bushing, 4" x 2", Threaded, Galvanized BESTSELLERS 1/2" reduced shankMeets the following specifications: Material: ANSI ASTM A 197, Dimensions: ANSI ASME B. 16. 3, B16. 14, B16. 39, Threads: ANSI B1. 20. 1. End Style: Threaded Nominal Size: 4 x 2 In Material Specification: ASTM A 197 Standards: ANSI B1. 20. 1 Threads Finish: Galvanized Dimensional Standards: ANSI ASME B. 16. 3, B16. 14, B16. 39. WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer