Machined 1045 steel threaded reducer bushings with a 5/8-11 UNC-2A male outside thread and a smaller UNC-2B female through thread. Both threads are right hand. An integral hex shoulder provides wrench access.
Sold in packs of 100 identical parts. Cart quantity 1 = 100 pieces. Select the inside thread and shank length. Bare machined and deburred.
Dimensions in inches: hex across flats 0.750; hex thickness 0.188. Available shank lengths measured below the hex: 0.500, 0.750, 1.000. Overall length equals shank length plus hex thickness. Inside thread options: 1/4-20, 5/16-18 UNC.
Hex tolerance +.000/-.005; shank length and hex thickness +/- .003. Straight machine threads. No fluid-sealing or load rating is assigned. Retention and service suitability depend on the final assembly.
Manufacturing reference: MMW-TRB-001 Rev A, common geometry Sheet 1 and size Sheet 3 of 10. The selected variant SKU matches the drawing.