HARDLOCK Nut (Rim Type) Availability

The locknut, “HARDLOCK Nut” also known as eccentric double nut comes in BASIC and RIM Type.
RIM refers to the Flanged section on the Convex nut and prevents the socket from getting stuck on the bottom nut (Convex nut).

The below chart answers the below questions:
・What sizes is Hard lock nut (Rim Type) available in?
・What materials or finishes Rim is not available in?
・Is there a Double Nut or Jam nut with a stopper?

    Quick Answer:

Rim type products are only available for Metric type HARDLOCK locknuts. Currently these locknuts are available in sizes M5 ~ M30 only for coarse pitch threads, with the exception of sizes M14 and M18. Stainless Steel hard lock nuts (Rim type) are available from M5 ~ M16, with the exception of M14.

All other exceptions seen as below.

Size Class 4/low-carbon steel
(JIS SS400 equivalent)		 Class 8/medium-carbon steel
(JIS S45C)		 Class 10/chromium molybdenum steel (JIS SCM435) A2/stainless steel (JIS SUS304 equivalent)
Electrogalvanized
(trivalent chromate)		 Hot-dip galvanized
(HDZ35)		 Treated with manganese phosphate
(Parkerized)		 Treated with manganese phosphate
(Parkerized)		 Unplated/plain
M5x0.8 Available − − − Available
M6x1.0 Available − − − Available
M8x1.25 Available Available Available Available Available
M10x1.5 Available Available Available Available Available
M12x1.75 Available Available Available Available Available
M14x2.0 − − − − −
M16x2.0 Available Available Available Available Available
M18x2.5 − − − − −
M20x2.5 Available Available Available Available −
M22x2.5 Available Available Available Available −
M24x3.0 Available Available Available Available −
M27x3.0 Available Available Available Available −
M30x3.5 Available Available Available Available −

For items not provided in the table above, refer to the Basic Normal Type specifications.