The thread size of a drum-tightening lug is not standard and can vary depending on the brand and model of the drum. It is important to know the specific thread size when working with drum hardware to ensure compatibility and avoid damage.Camco Lug Mounting Screws (10-24 threads): Camco used 10-24 threads for their lug mounting screws during the Oaklawn era.Gretsch Broadkaster Rocket Lug Mounting Screws (10-24 threads): Gretsch offered three different styles of these screws, all featuring 10-24 threads.Gretsch Round Badge Lug Backing Screws (8-32 threads): Introduced in the early 1950s when Gretsch changed their lug style, these screws had a matte zinc finish and separate nickel round washers.Gretsch Hex Head Bolts: In the late 1960s, Gretsch started using hex head bolts with captive star washers. They had the same thread as the earlier slot head round badge screws.Kent Lug Mounting Screws (10-24 threads): Kent drums made in the US during the late 1940s to early 1960s used 10-24 threads for their lug mounting screws.Leedy Self-Aligning Lug Mounting Screws (6-32 threads): Leedy self-aligning lug mounting screws used 6-32 threads and were paired with backing plates.Leedy Box Lug Mounting Screws (8-32 threads): Leedy drums from the 1920s to 1930s featured box lug mounting screws with 8-32 threads.Leedy Conn Era Lug Mounting Screws (10-24 threads): Leedy drums from 1930 to the mid-1950s used 10-24 threads for their lug mounting screws.Ludwig & Ludwig Lug Mounting Screws (8-32 threads): Ludwig & Ludwig drums from the 1920s to 1940s, and possibly earlier, used 8-32 threads for their lug mounting screws. Their wood shell drums had cup washers, while their metal snares used different washers.Ludwig 3-Ply Lug Mounting Screws (8-32 threads): Introduced in the 1960s or early 1970s, Ludwig's 3-ply lug mounting screws had 8-32 threads.Ludwig 6-Ply Mounting Screws: Longer versions of the 3-ply screws, Ludwig introduced these in the 1970s, offering both original and self-tapping versions.Rogers Bread and Butter Lug Backing Screws (10-24 threads): Rogers drums from the 1950s to early 1960s used 10-24 threads for their bread and butter lug backing screws.Slingerland Radio King Lug Mounting Screws (8-32 threads): These screws were used on Slingerland Radio King drums from the late 1930s through the 1940s. They came in two lengths: 3/8" and 5/8", with the longer screws needed for the large reinforcement rings under the lugs.Slingerland 50s Lug Mounting Screws: Introduced with the Sound King lugs, these screws had 1/4" and 3/8" lengths and 8-32 threads.Slingerland Mid-60s to Early 70s Lug Mounting Screws (8-32 threads): These screws had a simple hex head design and came in three lengths: 5/16", 3/8", and 7/16" (measured below the captive washer).It is worth noting that vintage drums and accessories with standard threads are less common today, as US manufacturing moved overseas in the 1980s, leading to a switch to metric tooling. However, the information provided above should be helpful for repairing or restoring vintage drum gear., Slingerland Radio King Lug Mounting Screws (8-32 threads): These screws were used on Slingerland Radio King drums from the late 1930s through the 1940s. They came in two lengths: 3/8" and 5/8", with the longer screws needed for the large reinforcement rings under the lugs., Slingerland Radio King lug mounting screws, late 1930s- through sometime in the 40s. 8-32 threads, 3/8" and 5/8" lengths. The longer screws were needed for where the large reinforcement rings protruded under part of the lug..