/ Precision Measuring Tools / Precision Hand Tools / Precision Shop Tools / Jack Screws / F190A * Not actual product image 64623 F190A Little Giant Jack Screw - Jack Only, with Fine-Adjusting Screw 64623 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, with Fine-Adjusting Screw. Features Specifications Parts Contact Starrett Features 40-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 1JACK ONLYF190A0 2JACKSCREW W/CAPPT995251 3BASE #FS19024364-01 4ROD, 2 1/4-6 1/4"02143-01