Hex Jam Nut,M2 x 0.40mm,4mm W,PK50 -- 6CB36 [6CB36 from Lindstrom Metric, LLC]
from Grainger Industrial Supply

Hex Jam Nut, Nut Type Thin, A2 Stainless Steel (Comparable to 18-8 Stainless Steel), Plain Finish, Grade Not Rated, Thread Size M2X0.40mm, Thread Type Metric, Right Hand Thread Direction, Width 4mm, Height 1.2mm, Brinnel Hardness 170, General Purpose, Meets/Exceeds DIN 439B, Package 50 [See More]

  • Size: M2
  • Material: Stainless Steel
  • Type: Jam Nut
  • Thread Direction: Right Hand
ESL Slotted Self-Locking Hexagon Nut -- ESL020040QVZO
from J.Lanfranco Fastener Systems Inc.

The ESL's two self-locking slots make it ideal in any application subjected to high vibration, shock, impact, heavy loads, and high temperatures. The ESL provides unparalleled locking ability without seizing up upon removal. [See More]

  • Size: M2
  • Material: Bronze (optional feature); Brass (optional feature); Exotic Metals (optional feature); Steel (optional feature); Hardened Steel (optional feature); Titanium (optional feature)
  • Type: Slotted Locknut
  • Finish: Galvanized (optional feature); Nickel Plated (optional feature); Zinc Plated; Zinc Chromate (optional feature); Geomet®
Self-Clinching Collar, Locking -- NHLSS-M2-*-BDF
from PENCOM

Custom sizes available [See More]

  • Size: M2
  • Finish: Black Dry Film Lubricant
  • Material: Stainless Steel
  • Thread Direction: Right Hand