HP Pro 4300 C9H70UT C9H70UT#ABA manual Screws used in the printer, Screw measurement guide

Screws used in the printer

This table describes the screws used in the printer and provides guidelines to help determine where each type of screw is used. The screws can vary in length depending on the thickness of the material that is being fastened.

Always note where each type of screw is located and replace each one in its original location.

Hint	When you are disassembling the product, place the screws into the chassis holes from which they
	were removed. This prevents their loss, and ensures that the proper type and length of screw for
	each location is used when the product is reassembled.
	Table 36. Common fasteners used in this product
		Drawing and description	Purpose
			This screw is used to fasten metal

	to metal when good electrical
	contact is needed. This screw
	also provides high resistance to
	loosening.
Phillips machine screw with captive star washer
	This screw is used to fasten sheet
	metal or plastic to plastic frames
	(the deep, coarsely spaced
	threads provide an increased
	holding capability while
Phillips screw with self-tapping threads	decreasing the possibility of
	stripping the target hole).

Reinstal note: To install a self-tapping screw, first turn it counterclockwise to align it with the existing thread pattern, and then carefully turn it clockwise to tighten it. You will feel resistance and hear the screw click when it engages the existing threads in the hole. Do not overtighten the screw. If a self-tapping screw- hole becomes stripped, repair the screw-hole or replace the affected assembly.

This screw is used to fasten sheet metal parts to the sheet metal chassis. It spans large clearance holes and distributes the load by increasing the bearing surface.

Phillips washer-head machine screw with a broad, flat washer attached to the screw head

Screw measurement guide

134 Removing and replacing parts Q2431-90912