Loctite 2400NA and 2700NA threadlockers have an MSDS health rating of 1. They reportedly enhance occupational health and safety by eliminating allergic skin, CMR, and Prop 65 hazards. 2400NA is a mediumstrength, general-purpose formulation for fasteners from 0.25 to 0.75 in. in diameter. It allows fasteners to be disassembled using standard hand tools. 2700NA is a high-strength threadlocker for permanent assembly of fasteners up to 0.75 in. in diameter.
Henkel Corp., Engineering Adhesives
One Henkel Way
Rocky Hill, CT 06067