What fastener sizes is Loctite 266 suitable for?

This threadlocker is designed for metal threaded fasteners up to 20 mm (3/4") in diameter.

What is the maximum temperature resistance of Loctite 266?

Loctite 266 resists operating temperatures up to 232 °C (450 °F).

Does this threadlocker withstand severe shock and vibration?

Yes, its high strength formula reliably prevents loosening caused by heavy shock and vibration.

Can Loctite 266 be applied to lightly oiled fasteners?

Yes, it is surface-tolerant and cures reliably on lightly oiled or mildly contaminated metal surfaces.

How do you disassemble parts locked with Loctite 266?

Apply localized heat above 250 °C to the assembly and disassemble while hot using hand tools.

LOCTITE 266 high-strength threadlocker for high temperatures (50 ml bottle) - 1117533

Name: LOCTITE 266 high-strength threadlocker for high temperatures (50 ml bottle) - 1117533
Brand: LOCTITE
SKU: 11993305
Price: 64.4 EUR
Availability: PreOrder

Supplier number: LOCTITE 1117533 | EAN 0079340428478

Recommended Retail Price €81.51

64.40 tax incl.

€53.22 excl. VAT (incl. all environmental contributions)

On order: delivered from 16/10/2026

The minimum purchase order quantity for the product is 10.

Ordered before 20:00 - delivered as of 16/10/2026
Free shipping
Delivery by DHL

✆ Talk to a specialist

How does it work?

For a purchase value of €99 to €125 excl. VAT, receive FREE LOCTITE 55 thread sealing cord 50 m (IDH 528244) worth €9.99.
For a purchase value of more than €125 excl. VAT, receive FREE LOCTITE SF 7850 hand cleaner 400 ml (IDH 2098250) worth €13.21.
The free item is automatically added to your order. No registration is required.
The promotion is valid from 01.10.2026 to 31.10.2026.
Loctite Buy & Get deals are recognisable by the promotion label on the product page. Click the label to view all available deals.

Reliable locking with Loctite 266

Practical benefits

Resists extreme working temperatures: You secure threaded assemblies reliably under harsh conditions thanks to temperature resistance up to 232 °C.
High strength permanent bond: The heavy-duty formula prevents fasteners from loosening under severe shock, heavy loads, and continuous vibration.
Clean and controlled application: Its thixotropic properties ensure the liquid stays on the threads without unwanted dripping or migration.

In a nutshell

The right choise for

With Loctite 266, you permanently lock and seal heavy-duty metal threaded fasteners up to 20 mm in diameter with total confidence. This high strength threadlocker is engineered for demanding applications, delivering dependable thermal resistance up to 232 °C. Its robust formulation prevents bolts and studs from loosening under continuous vibration or severe mechanical shock, making it ideal for engines and industrial machinery. Thanks to its thixotropic liquid properties, you can apply it cleanly and accurately without unwanted dripping, even on lightly oiled metal surfaces. When needed, disassembly is straightforward by heating the joint above 250 °C. This 50 ml bottle provides the reliable holding power you need under high temperatures.

Product information FAQ

€64.40

tax incl.

Key features according to our expert

Net volume: 50 ml
ADR packing group: Not applicable
ADR class: Not applicable
Principal hazard property: GHS07 Harmful or irritant
UN number: Not applicable
P-statements: P261; P273; P280; P333 + P313; P337 + P313
H-statements: H317; H319; H335; H412
Hazard class: GHS07 Harmful or irritant
Physical state: Liquid
Flash point: > 100 °C

Product description:

High temperature, high strength, red-orange threadlocker.
LOCTITE 266 is a high temperature, high strength, red-orange anaerobic threadlocker.
It is a 1-part, thixotropic liquid that is fast curing and which resists oil and mild surface contamination at temperatures up to +232°C.
Locks fasteners up to 20mm in diameter.

Precautionary statements

P261: Avoid breathing dust/fume/gas/mist/vapours/spray.
P273: Avoid release to the environment.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P333 + P313: If skin irritation or rash occurs: Get medical advice/attention.
P337 + P313: If eye irritation persists: Get medical advice/attention.

Hazard statements

H317: May cause an allergic skin reaction.
H319: Causes serious eye irritation.
H335: May cause respiratory irritation.
H412: Harmful to aquatic life with long lasting effects.

All Features

Net volume: 50 ml
Adr packing group: Not applicable
Adr class: Not applicable
Principal hazard property: GHS07 Harmful or irritant
Un number: Not applicable
P-statements: P261; P273; P280; P333 + P313; P337 + P313
H-statements: H317; H319; H335; H412
Hazard class: GHS07 Harmful or irritant
Physical state: Liquid
Flash point: > 100 °C

Brand LOCTITE
11993305
EAN 0079340428478
Supplier number LOCTITE 1117533

Frequently asked questions about this product

Answered by specialists

What fastener sizes is Loctite 266 suitable for?: This threadlocker is designed for metal threaded fasteners up to 20 mm (3/4") in diameter.
What is the maximum temperature resistance of Loctite 266?: Loctite 266 resists operating temperatures up to 232 °C (450 °F).
Does this threadlocker withstand severe shock and vibration?: Yes, its high strength formula reliably prevents loosening caused by heavy shock and vibration.
Can Loctite 266 be applied to lightly oiled fasteners?: Yes, it is surface-tolerant and cures reliably on lightly oiled or mildly contaminated metal surfaces.
How do you disassemble parts locked with Loctite 266?: Apply localized heat above 250 °C to the assembly and disassemble while hot using hand tools.