Material page for anaerobic threadlockers and thread sealants in FKM (Viton®-type) (fluoroelastomer, typically 75 Shore A). The sizes below are the ones we supply; there is no published dimensional standard for this article, so the table rather than a standard number is what to quote. Corrosion behaviour is excellent resistance to heat, fuels, and most chemicals; poor with ketones and hot water/steam and the service range is approx. -20 °C to +200 °C.
Why Choose FKM (Viton®-type) for Anaerobic Threadlockers and Thread Sealants
Specified where temperature or chemical exposure exceeds nitrile. For anaerobic threadlockers and thread sealants, this matters when excellent resistance to heat, fuels, and most chemicals; poor with ketones and hot water/steam is the primary requirement.
Mechanical & Physical Properties
| Grade designation | fluoroelastomer, typically 75 Shore A |
|---|---|
| Magnetic response | Non-magnetic |
| Service temperature | approx. -20 °C to +200 °C |
| Corrosion characteristic | Excellent resistance to heat, fuels, and most chemicals; poor with ketones and hot water/steam |
Corrosion Behavior in Service
Carbon and alloy steel anaerobic threadlockers and thread sealants require a coating for corrosion protection. Zinc plating (with or without passivation) is the most common; hot-dip galvanizing is used for outdoor structural service; black-oxide is mainly a tarnish-prevention finish for tool-room use.
Comparable Grades
For anaerobic threadlockers and thread sealants, consider NBR where the service is ordinary mineral oil and the cost matters, or EPDM for hot water and steam, which attacks FKM. Elastomer selection is decided by the medium, the temperature range and whether the seal is static or dynamic — not by strength.
Sizes of Anaerobic Threadlockers and Thread Sealants Available in FKM (Viton®-type)
| Grade | Removal | Typical use | Notes |
|---|---|---|---|
| low strength | hand tools | set screws, adjusting screws, small fasteners | up to about M12 |
| medium strength | hand tools | general assembly, machine screws | the usual default |
| high strength | heat and hand tools | studs, permanent assemblies | not for parts serviced in the field |
| thread sealant grade | hand tools | tapered pipe threads, hydraulic fittings | seals rather than locks |
| retaining compound | heat | bearings, bushes, cylindrical fits | not a thread product |
Dimensions are independent of the material: every size above is available in FKM (Viton®-type).
Custom manufacturing · Made to drawing
Need this seal in a grade that is not listed?
Fkm is one of the grades the catalog describes. A special seal is almost always a compound change rather than a size change — the same dimensions in a material that survives the medium.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
