Yamamoto Sound Craft
cartridge mounting high rigidity bolt and washers set

This is a set of high-rigidity screws and washers for adjusting the weight balance of cartridges.
Commonly used aluminum screws have low strength and have disadvantages in terms of sound quality. Since the cartridge picks up the unevenness of the vinyl record as a music signal and plays it back, the effect of the vibration is significant. Of course, the impact on the sound quality of the headshell is significant, but the screws that secure the cartridge also greatly affect the sound. By using a high-strength screw to stop the cartridge, the sound quality is improved.
There are two types of bolts to choose from: titanium alloy and brass. There are several types of lengths, two of each and a nut in a set. The included nut has a small side of 4 mm, so it can be used for the groove part of the cartridge body without difficulty. The WA-1 is a brass, non-magnetic primed 24k gold-plated washer that can be used to increase the weight of analog cartridges when attached to the headshell. Use a longer screw to adjust the weight, including the headshell and cartridge, in combination with the WA-1. For fine tuning, you can adjust the number of nuts and the length of the bolts to unify the weight of the headshell and make it easier to use. If the total weight of the cartridge and headshell is unified, there is no need to adjust the needle pressure when changing the car ridge, making it easier to change the cartridge.

The WA-1 is a set of 10 washers made of brass and finished with a non-magnetic primed 24k gold gold plated finish.
BT-1 is a lightweight and highly rigid screw made of titanium alloy. BT-2 is a brass screw with a non-magnetic substrate treated 24k gold plated finish.

WA-1

format	Large brass washers for M3 and M2.6
External dimensions	Diameter 11mm, Inner Diameter 3.1mm, Thickness 2mm
weight	1.47g/1pc

BT-1

format	Cartridge mounting bolts and nuts
Set Contents	Plus head titanium bolt M2.6 length 6mm, 8mm, 12mm, 15mm 2 each 8 pieces in total 2 brass gold-plated nuts, 4mm on opposite side
material	Titanium alloy bolt fabric finish (light black), brass gold-plated nut

BT-2

format	Cartridge mounting bolts and nuts
Set Contents	M2.6 bolt length 6, 8, 12, 15, 18, 20, 25mm 2 each 10 M2.6 4mm nuts
material	Brass, non-magnetic primer, 24k gold plated finish