/ Precision Measuring Tools / Precision Hand Tools / Precision Shop Tools / Jack Screws / 190C * Not actual product image 190C Little Giant Jack Screw - 1" Extension Base Only 50683 190 “Little Giant” Jack Screws and Sets Little Giant Jack Screw Wedge Base Extension, 1" (25mm) Base 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. 1" Extension Base Only. Specifications 3D CAD Files / Exploded Parts Diagram Product Testimonials California Prop 65 Other similar products 190A Little Giant Jack Screw - Jack Only 190B Little Giant Jack Screw - 2" Extension Base Only 190C Little Giant Jack Screw - 1" Extension Base Only 190D Little Giant Jack Screw - Auxiliary Pointed Screw Only 190E Little Giant Jack Screw - Extension Base Only 190F Little Giant Jack Screw - Extension V Base Only F190A Little Giant Jack Screw - Jack Only, with Fine-Adjusting Screw F190D Little Giant Jack Screw - Auxiliary Pointed Screw with Fine-Adjusting Screw Only S190 Little Giant Jack Screw Set Complete with All Attachments SF190 Little Giant Jack Screw Set Complete, with Fine-Adjusting Screw and All Attachments Contact Starrett Specifications Made in America: Yes 3D CAD Files / Exploded Parts Diagram Login to see related product files. Or create an account. Product Testimonials Write a product review Write a product review Comments* First Name* Last Name* Email* Occupation The information you provide will be used in accordance with the terms of our privacy policy. I agree to the privacy policy. Please provide the required information. Thank you for submitting a product testimonial on www.starrett.com. By submitting information to Starrett, you acknowledge and give express permission for the L.S. Starrett Company to use and share your statements. California Proposition 65 Warning WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov