Universal phono cartridge mounting kit stainless steel screw set for turntables with 2.5mm and 2mm allen bolts, nuts and washers including short 6mm to long 20mm bolts for deep-bodied cartridges, supplied with allen keys
Universal Stainless Steel Phono Cartridge Mounting Kit with Allen Keys for Turntables

Mounting a new phono cartridge to your turntable's headshell requires specific, often hard-to-find hardware. This universal mounting kit provides a comprehensive solution, containing every bolt, nut, washer, and tool needed for a secure and correct installation. Designed for compatibility, it includes a full spectrum of stainless steel allen bolt lengths from 6mm for shallow mounts to 20mm for deeper cartridge bodies, plus dedicated fixings for Thorens headshells. By supplying manufacturer-recommended stainless steel instead of aluminium, and including the necessary allen keys, this kit removes the guesswork and potential for error, helping you achieve the precise fit required for optimal turntable performance and sound quality.
Features and Construction

This kit is constructed entirely from practical, specified components chosen for universal fit and durability. Its value lies in the completeness of the selection and the suitability of the materials used, as advised by equipment manufacturers.
Material and Build
The entire kit is manufactured from high-strength stainless steel. This material choice is critical, as several cartridge manufacturers explicitly advise against using aluminium screws, which can seize or become stuck in the threaded holes of the cartridge mounting plate. The source text cites Ortofon's installation instructions as a specific example of this guidance. The stainless steel construction ensures the fixings are robust and suitable for repeated installation and adjustment without risk of cross-threading or damage to the delicate cartridge body.
Size and Practical Fit
The kit's practicality is defined by its range of bolt lengths and threading. It focuses on the two most common thread sizes for this application: M2.5 and M2. The primary set consists of M2.5 allen bolts supplied in pairs at 6mm, 8mm, 10mm, 12mm, 16mm, and 20mm lengths. This spread allows you to select the shortest possible bolt that fits your specific cartridge and headshell combination, which is imperative for stability and performance. The secondary set includes M2 x 10mm and M2 x 16mm bolts, nuts, and washers specifically included for compatibility with the majority of Thorens turntable headshells.
Uses and Placement

This kit serves a very specific, technical purpose within the realm of analogue audio playback. Its use is centred on the correct mechanical installation of a critical component.
Event or Professional Use
For audio technicians, record store proprietors, or DJs who frequently swap or upgrade cartridges on multiple decks, this kit offers a reliable, always-available stock of correct fixings. It eliminates downtime spent searching for individual screws and ensures every cartridge is fitted with the appropriate hardware, maintaining consistent alignment and tracking force across different setups. The inclusion of two allen keys means the tools are always to hand, whether in a workshop or at a venue.
Everyday Home Use
For the home enthusiast installing a new cartridge or re-mounting an existing one, this kit provides peace of mind. It answers the common question of "which screws do I use?" by providing all viable options. The instructions emphasise using the shortest suitable bolt, and the kit enables you to follow this rule exactly. Having the correct stainless steel hardware also future-proofs your setup, allowing for safe removal and reinstallation if you decide to change cartridges later, without the risk of stuck aluminium screws damaging your equipment.
Benefits and Buying Value

The value of this product is derived from its completeness, material correctness, and the convenience it offers in a niche but essential task.
Reuse and Low Maintenance
Stainless steel is a durable material resistant to corrosion and wear. The bolts, nuts, and washers in this kit can be reused multiple times across different cartridges or turntables. Unlike consumable or disposable items, this is a permanent addition to your toolkit. The allen keys are standard sizes, so if one is misplaced, it is easily replaceable. The kit requires no maintenance itself; its value is in providing reliable components that facilitate the proper maintenance of your turntable.
Why Choose This Product
You would choose this universal mounting kit over individual or incorrect fixings for its adherence to manufacturer guidance and its comprehensive nature. It directly addresses the specified warning against aluminium screws. It also solves the practical problem of sourcing multiple, small-sized metric screws by bundling every necessary item—from the most common 6-12mm bolts to the specialist 16-20mm lengths and Thorens-compatible M2 bolts—into one purchase. This completeness saves time, prevents installation errors, and supports the goal of achieving the best possible performance from your phono cartridge and turntable.