Ahlstrom's qualitative grades of filter paper are, by definition, recommended for use in analytical methods, which determine or identify particulate constituents of a mixture irrespective of the amount present. Ahlstrom offers a complete range of low ash filter papers for general laboratory work that provides you with the correct combination of particle retention, filtration speed, loading capacity and wet-strength. Qualitative analysis, low ash content 0.06 percent, untreated, consistent performance, wet-strengthened grades, custom cut. These grades contain a high level of alpha-cellulose that provides high purity but will weaken when wet. The inherent strength of standard (untreated) grades does not pose a problem when they are used in routine quadrant folded applications. We do not recommend these grades for use in vacuum work or when wet handling is required.
Shoulder Screw, Shoulder Screw Type Standard Shoulder Screw, Head Type Standard, Drive Type Socket, Material Stainless Steel, Material Grade/Class 316, Finish Plain, System of Measurement Metric, Thread Size M2-0.4, Minimum Thread Length 3.8 mm, Shoulder Length 4 mm, Shoulder Length Tolerance -0.0 mm to +0.25 mm, Shoulder Diameter 3 mm, Shoulder Diameter Tolerance -0.04 mm to +0.0 mm, Pack Size Small Pack, Head Height 2 mm, Head Diameter 5 mm, Dimensional Standards AMPG 2013 ZS.02