Can this be used for screws on watch bracelets etc.? Thank you.

Yes, any fastener under 1/4". Blue lecture will work as well, but I prefer purple if the screw will need to come out in the future. If you don't ever plan on removing the screw, use red. I use purple on light duty fasteners such as RC airplanes/helicopters, small firearm components, etc.

Can this be used to lock nylon set screws in an 6061 aluminum bar?

I haven't used it in this application. I use it as a very low tension threadlocker on tiny screws..Have you tried Loctite blue threadlocker? Can you change out the nylon setscrews for brass or stainless steel ones? Those would be very lockable with any of the loctite products. The nylon is the problem since it distorts easily.

Does this Come with the Mil Spec certifications?

Only the bottle of Loctite is received. I would suspect that the certs can be downloaded from the Loctite web site.

Is this the one recomended by Rolex for the bracelet screws?

Yes, Rolex uses Loctite 222 for this purpose.

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22221 Loctite Threadlocker 222MS, 10mL Bottle, Purple

Product ID: 116793927

Details

Brand
Loctite
Compatible material
Plastic
Item form
Liquid
Colour
Purple
Item package quantity
1

⏳Full cure in 24 hrs

🔩Secures fasteners ≤1/4"

🌡️Performance -65°F to 300°F

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VT29895

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Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔒 Lock it down with confidence — purple power for precision fastening!

CONTROLLED LUBRICITY - Optimized viscosity (1200-5000 cP) delivers accurate clamp loads without slippage.
PRECISION FASTENER FIT - Engineered for fasteners up to 1/4 inch, ensuring a perfect, reliable hold every time.
REMOVABLE YET RELIABLE - Strong enough to secure, but can be removed with standard tools when needed—no permanent commitment.
QUICK APPLICATION WINDOW - 20-minute working time lets you lock down components efficiently without rush.
WIDE TEMPERATURE RESILIENCE - Maintains strength and stability from freezing -65°F to scorching 300°F environments.

Loctite 222MS Threadlocker in a 10mL purple bottle is designed for fasteners up to 1/4 inch diameter, offering controlled lubricity for precise clamp loads. It cures fully in 24 hours, performs reliably across extreme temperatures (-65°F to 300°F), and provides a 20-minute application window. This removable threadlocker balances strength and serviceability, ideal for professional-grade fastening needs.

Specifications

Manufacturer	Loctite
Part number	22221
Item Weight	18.1 g
Item model number	22221
Size	10 ML
Colour	Purple
Style	Bottle
Item Package Quantity	1
Number of Pieces	1
Cutting Diameter	1 Inches
Included components	Instruction guide included
Batteries included?	No
Batteries Required?	No
Item diameter	1 Inches

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