S9978, S24200 Medium Strength Threadlocker

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Medium Strength Blue 242 Threadlocker is our most widely used Threadlocker for automotive applications. Medium strength Threadlockers are used on most fasteners subject to vibration caused loosening that are not exposed to high heat. Typical applications include axle shaft flange bolts, spindle bolts, hub retaining bolts, ring gear bolts, pinion nuts, transmission fasteners, transfer case hardware, clutch cover bolts, flywheel bolts, and more. Two sizes available, S9978 will typically treat 4-8 fasteners depending upon size, S24200 is usually enough to cover all the fasteners of a major component like an axle, transmission, or transfer case. Made in U.S.A.

Also see our Shop Supplies web page for more thread treatment chemicals

S9978
Medium Strength Threadlocker 1 gram Single Use Packet
Yes
* Kits made up of multiple items may not show an inventory in-stock status but are almost always in stock!

S24200
Medium Strength Threadlocker 0.20 fluid ounce Tube
Yes
* Kits made up of multiple items may not show an inventory in-stock status but are almost always in stock!

tech note

Shop manuals may or may not specify the use of a Threadlocking compound. Most older manuals do not make any reference to any thread treatment, but most recent ones do. With the exception of wheel lug nuts, most threaded fasteners used in automotive drivetrains could be candidates for either a Threadlocker or anti-seize compound. If your service manual gives no guidance, you need to base your decision on both environmental conditions (corrosive and/or wet) and the consequences that may occur if a fastener backs off. As a basic rule, I apply Threadlocker to most fasteners such as spindle bolts that could cause severe consequences if they loosened up. For things like cross member bolts that usually do not come loose, but are subject to corrosion, I use anti-seize.