Pre-Coated Fasteners (MEC)

MEC Coatings by ThreeBond

ThreeBond pre-applied (MEC) material utilizes microencapsulation technology to coat threaded fasterners, providing powerful locking and sealing characteristics. ThreeBond handles the entire process of coating fasteners - manufacturing the coating material, preparing the fastener for coating and applying the MEC to the fastener at our Ohio facility. Our Ohio facility is ISO 9001 and ISO 14001 certified.

PRECOATED NUTS & BOLTS

BENEFITS OF USING MEC COATING

Eliminate errors:
line workers can be certain the adhesive is on the part, in the correct location and correct amount.

Eliminate physical locking mechanisms:
such as cotter pins and lock washers.

Reduce chance of skin irritation:
dry to the touch

Reduce component costs
and assembly time

Easy to use
with automation equipment

Environmentally friendly

Anti-tampering agent:
leaves a colored residue if the fastener is removed.

MAIN USES: SCREWS, NUTS & BOLTS THAT REQUIRE SEALING AND LOCKING

This processing technique provides fasteners with the sealing and locking function by applying micro-capsulated adhesive on the threaded parts of the bolt in a special process. When the fastener is assembled, the micro-capsule is ruptured and it adheres as a result of a polymerization reaction.

CROSS-SECTION VIEW OF A MEC-PROCESSED PART

With the surface of the threaded part processed by the micro-encapsulated high-reactive adhesive agent, the fastener is coated with the sealant and locking agent.

PRE-APPLIED MEC PRODUCTS

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Classification	Part Number	Color	Applicable Dimension	Critical Temperature of Heat Resistance		Curing Speed (20-25˚C)		Main Characteristics
Classification	Part Number	Color	Applicable Dimension	Locking	Sealing	Working	Final	Main Characteristics
Low Strength	TB2458	Green	M3 or larger	100˚C	170˚C	0.5-1h	24h	General Screws low adhesive force type easy removal
Medium Strength	TB2418	Yellow	M3 or larger	150˚C	170˚C	0.5-1h	24h	General Screws low tightening resistance axial force type 2488 used for nuts
	TB2468	Red	M3 or larger	100˚C	170˚C	0.5-1h	24h
	TB2488	Aqua	M3 or larger	130˚	N/A	0.5-1h	24h
High Strength	TB2448	Blue	M2~M40	160˚C	170˚C	0.5-1h	24h	General screws high adhesive force 2448B & 2478 high heat resistance
	TB2448B	Orange	M2~M40	160˚C	170˚C	0.5-1h	24h
	TB2478	Aqua	M3 or larger	130˚C	170˚C	0.5-1h	24h

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