The most reasonably priced component used on the Rm250 2000 (y) Optional is the Grease(c)ep2 Lithium 150g.
Parts such as the Optional: Thread Lock No.1303b Purpl 50g, Thread Lock No.1342, Thread Lock Super (1324), Thread Lock(1333b Red 50g) are included in the Rm250 2000 (y) Optional parts fiche.