The LSP1301 Series low pressure steel sight plug has a clear glass sight and male SAE straight thread connection. Designed to be an economical alternative to high performance fused sight plugs, the LSP1301 Series sight plug features a tamper resistant construction with the reliability of an o-ring seal. The sight plug can be accessorized with reflector, float ball and choice of tank seal material. Box quantities may apply. Standard Features: Stud end sizes from dash 08 (3/4-16UNF) to dash 28 (2¼-12UN) per SAE J1926/3 Clear glass sight Body machined from cold finished steel bar stock Zinc clear finish Available with open view or combination of reflector, float ball and tank seal Pressure & Temperature Ratings: Maximum operating temperature up to 180°F (82°C). For applications requiring maximum operating temperatures in excess of 180°F (82°C), consult factory for available options. Pressure ratings vary by sight plug size, refer to spec sheet for complete details. Caution: Do not use an impact wrench to install a sight plug. Not recommended for steam applications. Scratched glass significantly reduces the pressure rating of the sight plug.