ACME 3/8-8, 4 Start Components (2 Turns Per Inch) ◊ For screws measuring 3/8" diameter with 8 TPI and a 4 start acme thread form. ◊ Screws available at: McMaster-Carr [part# 98940A607]
Photo	Part #	Component	Need a flange?	Price	Buy
	AC38084-LN	Anti-backlash Leadnuts (more pics) ◊ Stock Flange: 1.250 dia. x .250 thick ◊ Overall length: 1.100 ◊ Spring clearance needed: .650 dia minimum	Add Your Flange options	$19.00 ea.
	AC38084-AC	Threaded Couplers (more info) ◊ Outside diameter: .860 ◊ Length: 1.250	Select Bore Size: 1/4" Bore (.250") 5/16" Bore (312") 3/8" Bore (.375") 5mm Bore (.197") 6mm Bore (.236") 7mm Bore (.275") 8mm Bore (.315") 9mm Bore (.354") 10mm Bore (.394") (This is for the stepper shaft)	$15.25 ea.
	AC38084-TC	Thread Clamps (more info) ◊ Outside diameter: .860 ◊ Thickness: .375		$9.50 ea.
	AC38084-FN	Flange Nuts Non anti-backlash nuts for various uses. ◊ Stock Flange: 1.250 dia. x .250 thick ◊ Body dia: .625 ◊ Overall length: .925	Add Your Flange options	$10.50 ea.