Yamamoto Acoustic Crafts High Rigidity Bolt & Washer Set for Cartridge Mounting

Set of highly rigid screws and washers for weight balance adjustment of cartridges.
Commonly used aluminum screws have low strength, which is a disadvantage in terms of sound quality. The cartridge picks up the unevenness of the record disc as a music signal and reproduces it. The headshell has a large impact on sound quality, of course, but the screws that hold the cartridge in place also have a large effect on the sound. The sound quality can be improved by using strong screws to fasten the cartridge.
Two types of bolts can be selected, one made of titanium alloy and the other made of brass. The set includes two of each of several different lengths and a nut. The included nut is small (4 mm on the opposite side) and can be used in the groove of the cartridge body without difficulty. WA-1 is a brass washer with non-magnetic undercoating and 24-karat gold plating that can be used to increase the weight of an analog cartridge when it is mounted in a headshell. A longer screw is used in combination with the WA-1 to adjust the weight of the headshell and cartridge included. For fine adjustment, adjusting the number of nuts and length of bolts makes it possible to unify the weight of the headshell section and makes it easier to use. If the total weight of the cartridge and headshell is unified, it will eliminate the need for needle pressure adjustment when replacing the carriage, making cartridge replacement easier.

WA-1 is a set of 10 washers made of brass with non-magnetic base treatment and 24k gold plating.
BT-1 is a lightweight, high-rigidity screw made of titanium alloy, and BT-2 is a brass screw with a non-magnetic base treatment and 24-karat gold plating.

WA-1

Type	Large brass washer for M3 and M2.6
Dimensions	11mm diameter, 3.1mm inside diameter, 2mm thickness
Weight	1.47g/1 piece

BT-1

Format of BT-1	Bolt and nut for cartridge mounting
Set Contents	Plus head titanium bolts M2.6 length 6mm, 8mm, 12mm, 15mm, 2 each total 8 pcs. 2 gold-plated brass nuts with 4mm side
Material	Titanium alloy bolt fabric finish (light black), brass gold-plated nut

BT-2

Type	Bolt and nut for cartridge mounting
Set Contents	M2.6 bolt length 6, 8, 12, 15, 18, 20, 25mm each 10 M2.6 nuts with 4mm opposite sides
Material	Brass, non-magnetic base treatment, 24k gold plating