The U.S. aircraft register, updated daily
Parts

Nitrate Thinner

No failure report names the nitrate thinner. 2 FAA approvals let 1 company make a replacement nitrate thinner, Randolph Products CO holding the most (2).

Approved replacement parts 2 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a nitrate thinner and sell it as an approved part for the models named. These are the companies holding such approvals for a nitrate thinner:

MakerPartReplacesFitsGrantedStatus
Randolph Products CONitrate Thinner 286286Miscellaneous Aircraft Make(s) as listed on Sealed...2003-03-27current
Randolph Products CONitrate Thinner 286Miscellaneous Aircraft Make(s) as listed on Sealed...2001-02-06current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.