/ Precision Measuring Tools / Precision Hand Tools / Precision Shop Tools / Jack Screws / 190A * Not actual product image 50681 190A Little Giant Jack Screw - Jack Only 50681 Other similar products Little Giant Jack Screws are used for leveling work on planer beds, drills, setting up machinery, and general use in toolrooms or machine shops. 190 Series are 2-1/4" to 3-3/8" / 57-85mm in Size. Series 190 and 191 have 20-pitch screws and for those who desire a finer adjustment, the F190 has a 40-pitch screw. Jack Only. Features Specifications Parts Contact Starrett Features 20-pitch screw Range : 2-1/4 - 3-3/8" / 57-85mm Jack Base Diameter : 1-1/4" / 32mm Specifications Range (in): 2 - 1/4 to 3 - 3/8" Range (mm): 57 - 85mm Maximum Height - Attachments (in): 6 -3/8" Maximum Height - Attachments (mm): 162mm Parts Member of Kit Item #DescriptionPart No.QtyInformation 10BASE #19002137-01 20JACKSCREW W/CAPPT990301 30•PLATE,TOP02142-01 40•JACKSCREW .500-20RD02140-01 50ROD, 2 1/4-6 1/4"02143-01