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Knobs and Handles Catalog
Heavy Duty - Inch
Product Information

Inserts: Carbon Steel - C1214 or equivalent, Stainless Steel - 303 or equivalent

Keys: 302 CRES or equivalent

Finish: Carbon Steel - Zinc Phosphate, Stainless Steel - Passivated

Tolerances: +- .10mm unless specified otherwise

Dimensions: All dimensions are in inches

Keys: Inserts with an internal thread size of 5/16 and larger have 4 locking keys. Smaller sizes have 2 locking keys

Heavy Duty - Inch
Carbon
Steel
Part No.
Stainless
Steel
Part No.
Internal
Thread
Class 2B
External
Thread
(Mod.) Class 2A
Length
81388A 81412 8-32 5/16-18 .31
81389A 81413 10-24 3/8-16 .31
81390A 81414 10-32 3/8-16 .31
81391A 81415 1/4-20 7/16-14 .37
81392A 81416 1/4-28 7/16-14 .37
81393A 81417 5/16-18 1/2-13 .43
81394A 81418 5/16-24 1/2-13 .43
81395 81419 3/8-16 9/16-12 .50
81396 81420 3/8-24 9/16-12 .50
81397 81421 7/16-14 5/8-11 .62
81398 81422 7/16-20 5/8-11 .62
81399 81423 1/2-13 3/4-16 .62
81400 81424 1/2-20 5/16-18 .62
81401 9/16-12 3/4-16 .81
81402 9/16-18 3/4-16 .81
81403 5/8-11 7/8-14 .87
81404 5/8-18 7/8-14 .87
81405 3/4-10 1-1/8-12 1.12
81406 3/4-16 1-1/8-12 1.12
81407 7/8-9 1-1/4-12 1.25
81408 7/8-14 1-1/4-12 1.25
81409 1-8 1-3/8-12 1.37
81410 1-12 1-3/8-12 1.37
81411 1-1/4 1-3/8-12 1.37