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nicozeg · 07-09-2004, 12:33 PM

After a lot of experience mounting blocks over the last couple years, and tired of the tedious labor that can be repetitive block tests, have found what I consider the ideal mounting kit. The result is a cheap, quick and reliable group.

The parts: (McMaster pn - Description)

-91772A161 - 18-8 SS Pan Head Phillips Machine Screw 6-32 Thread, 2-1/2" Length
This is the same thread used on the standard AMD64 back plate, so is very future proof.

-9657K154 - Steel Compression Spring Znc-Pltd Spring-Tempered, 1" L, 5/16" OD,.035" Wire
Deliver 5 lbs at full compression, for a total of 20, right on AMD recommended force.

-92741A110 - Brass Round Knurled Thumb Nut 6-32 Screw Size, 3/8" Head Dia, 1/4" O'all Height
Cheap and easy to screw without tools.

-90130A007 - EPDM Rubber Cushioning and Sealing Washer #6 Screw Size, .120" ID, 1/4" OD, .062" Thickness
This is a key element. It protects the mainboard and avoids screw rotation while tightening.

-9452K318 - Buna-N O-Ring As568A Dash Number 104
Used to hold bolt on position while mounting.

-90061A007 - Black Nylon 6/6 Shoulder Washer Short Barrel, #6 Screw Size, .040" Length
One on each side of the spring. Protect the block, keep the spring centered, and provide a smooth sliding surface to the nut.

Total cost depends on quantity, but is like U$1 per bolt assembly.

Some details of the installation:

The rubber washer does a very good job, once the bolt head and mainboard are touching it, there's no rotation while tightening, so only one hand is required and no tools.

The O-ring fits tightly, and holds the screw in place. Once it is close to the mobo there’s no more access needed to the backside, the rest of the installation can be done with the board mounted.

Since only one hand is enough to tighten each screw, the process can be done in parallel, tightening at the same time each diagonal pair. This results in an always balanced force on the center of core, making it very safe to bare dies cpus.

I Hope this info is useful for procoolers, finding the ideal matching parts required several hours of research on Mac Master catalog.

Any suggestions to improve it will be appreciated.

07-09-2004, 12:33 PM	#1
nicozeg Cooling Savant Join Date: Sep 2002 Location: Santiago, Chile Posts: 403	The ideal block mounting kit. After a lot of experience mounting blocks over the last couple years, and tired of the tedious labor that can be repetitive block tests, have found what I consider the ideal mounting kit. The result is a cheap, quick and reliable group. The parts: (McMaster pn - Description) -91772A161 - 18-8 SS Pan Head Phillips Machine Screw 6-32 Thread, 2-1/2" Length This is the same thread used on the standard AMD64 back plate, so is very future proof. -9657K154 - Steel Compression Spring Znc-Pltd Spring-Tempered, 1" L, 5/16" OD,.035" Wire Deliver 5 lbs at full compression, for a total of 20, right on AMD recommended force. -92741A110 - Brass Round Knurled Thumb Nut 6-32 Screw Size, 3/8" Head Dia, 1/4" O'all Height Cheap and easy to screw without tools. -90130A007 - EPDM Rubber Cushioning and Sealing Washer #6 Screw Size, .120" ID, 1/4" OD, .062" Thickness This is a key element. It protects the mainboard and avoids screw rotation while tightening. -9452K318 - Buna-N O-Ring As568A Dash Number 104 Used to hold bolt on position while mounting. -90061A007 - Black Nylon 6/6 Shoulder Washer Short Barrel, #6 Screw Size, .040" Length One on each side of the spring. Protect the block, keep the spring centered, and provide a smooth sliding surface to the nut. Total cost depends on quantity, but is like U$1 per bolt assembly. Some details of the installation: The rubber washer does a very good job, once the bolt head and mainboard are touching it, there's no rotation while tightening, so only one hand is required and no tools. The O-ring fits tightly, and holds the screw in place. Once it is close to the mobo there’s no more access needed to the backside, the rest of the installation can be done with the board mounted. Since only one hand is enough to tighten each screw, the process can be done in parallel, tightening at the same time each diagonal pair. This results in an always balanced force on the center of core, making it very safe to bare dies cpus. I Hope this info is useful for procoolers, finding the ideal matching parts required several hours of research on Mac Master catalog. Any suggestions to improve it will be appreciated.