1 3/4". These drawn brass lug casings were prone to breakage.
Camco (& George Way)
Camco George Way Tuxedo Lug
2"
Camco 847 Aristocrat turret lug
1 5/16"
Camco by Tama tom lug
4cm
Camco by Tama bass drum lug
6cm
Carlton
Carlton long bass drum or marching snare lugs, 1960s-70s
4 15/16"
Fibes
Fibes/Corder/Darwin lugs casing, 1970s-80s
1 7/8"
Gracy
Gracy snare lugs, 1960s
2 1/16" - these lugs are outwardly indistinguishable from Gretsch snare lugs but do not share the same mounting hole measurements
Gretsch
Gretsch rocket Broadkaster lugs
2 1/8"
Gretsch 5474 large lug
1 5/8"
Gretsch 5473 small lug
1 5/16"
Gretsch 5472 snare lug
2 1/8"
Hayman
Hayman lug
1 3/8"
Kent
Kent 1940s tapped tom lug
1 1/4"
Kent 1940s-early 50s tom lug
1 5/16"
Kent tom lug casings, probably late 1950s-60s
1 1/16"
Kent 1950s double-ended lugs, 1950s
1 9/16"
Kent double-ended lugs, 1950s, a minutely different casting than the version above
1 1/2" (very slightly different than the similar version above)
Kent coffin lug, 1960s
1 5/16"
Leedy
Leedy #50 Self-Aligning lug
1" vertical
11/16" horizontal
Leedy Box/X lug, 1930-50
1 5/8"
Leedy tapped tom lug, 1937-38
15/16"
Leedy Airline lug casing, mid to late 1940s
1 3/16"
Leedy large beavertail lug, 1940-55 (continued after Slingerland's purchase of Leedy)
1 1/2"
Leedy small beavertail lug
1 3/16"
Leedy Dreadnought bass drum lug
7"
Leedy Dreadnought tom lug
1 5/32"
Leedy Slingerland era bass drum lugs
1 1/2", as pre-Slingerland large beavertails were. The Slingerland era Leedy lugs take 8-32 mounting screws, as opposed to the Conn-era 10-24 screws.
Leedy Slingerland era snare drum lugs
2 1/4"
Ludwig
Ludwig & Ludwig Imperial lug (1930s)
1 15/16"
Ludwig 2243 large Classic lug
1 11/16"
Ludwig 2246 small Classic lug
1 1/4"
Ludwig 2239 Large bowtie lug
3 7/8"
Ludwig 2240 bowtie lug - notched version for metal shells is the 2234
2 3/16"
Ludwig & Ludwig/Leedy & Ludwig Large Imperial Lug, 1940s-50s
6 7/8"
Ludwig 2206 Large Imperial Lug, 1960s-80s
6 3/8"
Ludwig 2230 Imperial lug
2 3/16"
Ludwig Modern High Tension or, later, Long Classic Lug. 1963-present
2 3/16", with a 2 3/4" space between the middle holes
Ludwig Modern High Tension or, later, Long Classic lug (short version), 1963-present
4 5/8"
Ludwig Standard snare lug, introduced 1968
2 3/16"
Ludwig Standard tom lug, introduced 1968
1 11/16"
Ludwig PC1041 Accent tom lug
1"
Pearl
Pearl was forward-thinking in their lug design. All Pearl lugs beginning sometime in the 1960s are standardized at 1/2-inch increments in their mounting hole measurements. They are generally interchangeable between eras.
Pearl bass drum lug, early to mid-1960s
2 5/16"
Pearl generic lug, 1970s-90s (and copied by countless low-end import kit makers)
1 1/2"
Pearl President lug
tom 1 1/2"
bass drum 2"
Pearl 2-Way Tom Lug, 1980s
Premier
Olympic by Premier 843756 bass drum lugs, 1960s-70s
2 7/8"
Premier 1049-20 lugs
3.25"
Premier 125-20 lugs
5.25"
Premier B6158 70s lug, originally a Beverley design
1 1/8"
Premier RD843756 70s tom lug
1 7/16"
Remo Mastertouch lug, 1990s
2"
Rogers
Rogers 3917R Bread & Butter Lug
1 5/8" - there were many versions of the bread & butter lugs, each with somewhat different measurements.
Another version of the Rogers 3917R bread & butter lug
this one is 1 11/16"
Rogers 4947R bread & butter bass drum lug
2 1/8". These holes appear slightly farther apart due to cracks in the frame.
Rogers 4850R large double ended beavertail lug
3 3/16"
Rogers 4854R large beavertail lug
2 5/16"
Rogers 4856R small double ended beavertail lug
1 15/16"
Rogers 4858R/4859R small beavertail lug
1 3/4"
Slingerland
Slingerland 548 Streamline bass drum lug (549 when used without inserts)
3"
Slingerland 547 Streamline lug
2 3/16"
Slingerland 564 small beavertail lug. Later versions had a flattened base at the front.
1 1/2"
Slingerland Rolling Bomber bass drum lug
1 5/8" (approximate). The 8-32 threads were cut directly into the wood.