The Hard Disk Drive Anti-Vibration Screws feature blue rubber anti-vibration grommets that absorb vibrations created by the hard drive and keep the vibrations from being amplified by the computer case. The rubber grommet fits snug on the thicker "shoulder" part of the screw to make a tight fit. Buy 1 screw or as many as you want.

Thread:	6-32
Thread Length:	4.75mm
Shoulder Length:	3.3mm
Shoulder Ø:	4.4mm
Total Length:	10.85mm

04-28-2011
Reviewer: ()
Great product. As another reviewer pointed out, you will need to drill bigger holes in the drive mounts of the case (NOT the drives!). I used a 1/4 inch drill bit and the grommets fit perfectly. I also had to slightly bend the mount chassis of the case outwards to give the drives a little extra room (to accommodate for the extra thickness added by the grommets). Otherwise, the grommets get sheared off when sliding the drive back into the chassis. I recommend ordering a few extra grommets in case this happens.

03-28-2010
Reviewer: Unbelievable Easy Solutions For (1)
First time ever , after DELL computers, I bought HP Pavilion... From the first day I''ve received it, I''ve noted annoying loud noise, coming from hard drives... Replacing hard drives did not helped. And then... I found a LITTLE - LITTLE difference between DELL assembly and HP assembly - DELL using rubber washes in-between HD''s and case everywhere!!! I''ve purchased these Hard Disk Drive Anti-Vibration Screws with the really soft rubber washes and installed it. Have to tell you - it is not 0just insert rubber washes and go... - You may need to drill existing holes to bigger size to fit rubber washers- and that''s it. The HD NOISE DISAPPEARED AT ALL!

06-12-2009
Reviewer: cwk (1)
These screws and grommet combo''s are the perfect fit for those who have purchased a normal tower and wanted to get rid of excess vibration from hard-drives! When they arrived I noticed that they are too large for standard case holes that are pre-punched for hard-drive screws. In order to remedy this you will need a 15/64ths (.234”) drill bit and a steady hand. After enlarging the holes for the grommet, (remove your hard drives first!), I test-fit the hard-drive with the grommets in. They slid in with minimal resistance and the screws held the drives in securely! After reassembly and booting, I thought I forgot to plug the hard-drives in. The vibration is GONE from my tower. Thanks FrozenCPU! Note: When installing the screws you only need to tighten them until they are firm, over tightening will result in cutting the grommet.