3/8-16unc 276723-4-3/8-16unc
Hex Head Cap Screws are designed for easy assembly into a tapped hole Hex Cap Screws meet SAE specifications with a specially designed washer face under the head and a chamfered pointGrainger's got your back Easy online ordering for the ones who get it done along with 24/7 customer service, free technical support & more3/816 UNC 2B (21) The "2B" is a tolerance class The standards for a thread series include specifications of tolerances Most specify several different classes, because for some uses a close fit is essential, while achieving it for other uses would be a waste of money Hex Nut 3 8 16 Unc 4-3/8-16unc