Threaded stepped thermowells used in hydraulics. Manufactured by Ashcroft. All models are real world products that can be purcahsed (I am not affiliated with Ashcroft except as a customer). All parts are drawn to real world scale. Multiple lengths included.Part 10W0250R260: 1/2dia x 2.5Part 10W0250RT385: 5/8dia x 2.5Part 10W0450RT260: 1/2dia x 4.5Part 10W0450RT385: 5/8dia x 4.5Part 10W0750RT260: 1/2dia x 7.5Part 10W0750RT385: 5/8dia x 7.5Part 10W1050RT260: 1/2dia x 10.5Part 10W1050RT385: 5/8dia x 10.5Part 10W1350RT260: 1/2dia x 13.5Part 10W1350RT385: 5/8dia x 13.5Part 10W1650RT260: 1/2dia x 16.5Part 10W1650RT385: 5/8dia x 16.5Part 10W2250RT260: 1/2dia x 22.5Part 10W2250RT385: 5/8dia x 22.5