Threadlocker Selection Guide

LOCTITE® Threadlocker Selection Guide

Threadlockers are designed to lock fasteners in place while sealing them against wear and tear. Suited for a wide range of applications, LOCTITE® Threadlockers increase the reliability of threaded assemblies. The below selection guide will help you find the right Threadlocker for your application.

Shortcomings of locking devices

Split ring or spring washers

Split ring or spring washers

Increased friction reduces clamp load; will not ensure reliable threadlocking under dynamic loads.

Tab washers, split pins, castle nuts

Tab washers, split pins, castle nuts

Expensive and time-consuming methods, they often impose challenges to line up their components appropriately (i.e., tabs, cotter pins).

Tooth or ribbed flanged bolts

Tooth or ribbed flanged bolts

Prevent self-loosening, but are expensive; need larger flange-bearing surfaces and may damage the surfaces.

Nylon nut

Nylon nut

More expensive than a standard nut, nylon inserts increase friction, which results in inaccurate torque.

How does LOCTITE® Threadlocker help?

Problem

Problem

Without Threadlockers:
Vibrational loosening due
to 85% air gap.

Solution

Solution

With Threadlockers:
There's no vibrational
loosening and no gaps.

Why use LOCTITE® threadlockers?

LOCTITE® Benefits:

Better Performance

  • Reliable assembly: Lock against vibration, shock and thermal cycling – plus seal against corrosion and galling.
  • Easy disassembly: Using hand tools when low- or medium-grade formula is selected.
  • Outperform locking devices: Better clamp load retention compared to all mechanical locking devices.

Cost Savings

  • Failure: Reliable threaded assemblies reduce costly downtimes.
  • Inventory: "One size fits all" universally applicable for a wide range of fastener sizes.
  • Processing: Ease of automation reduces assembly costs and increases throughput.
  • Material Cost: Lower cost per unit compared to most locking devices.

Find Your LOCTITE® Threadlocker

Suited for a wide range of applications, LOCTITE® Threadlockers increase the reliability of threaded assemblies.

Purple

Model No. Mfg No. Size
AA553 231125 10 ml bottle
AA554 231127 50 ml bottle

Blue

Model No. Mfg No. Size
AA188 329837 10 ml bottle
AA555 1329467 50 ml bottle
AC322 1329505 250 ml bottle

Green

Model No. Mfg No. Size
AA454 233731 10 ml bottle
AA455 135392 50 ml bottle
AA024 135393 250 ml bottle

Red

Model No. Mfg No. Size
AD289 1330583 10 ml bottle
AD290 1330585 50 ml bottle
AD291 1330335 250 ml bottle

Shop By Threadlocker Strength

LOCTITE 222

LOCTITE® 222
Low Strength

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LOCTITE 243

LOCTITE® 243
Medium Strength

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LOCTITE 290

LOCTITE® 290
Medium/High Strength

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LOCTITE 263

LOCTITE® 263
High Strength

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