LOCTITE 272 threadlocker(mm)

LOCTITE 272 is a high-strength, one-component anaerobic threadlocker engineered for the permanent locking and sealing of threaded fasteners. This red-orange acrylic dimethacrylate ester adhesive is purpose-built for large bolts and studs (M25 and larger) found in heavy industrial machinery, structural equipment, and high-vibration assemblies. As a true anaerobic threadlocker, LOCTITE 272 cures only when confined between close-fitting metal surfaces in the absence of air, forming a durable thermoset bond that locks out fastener loosening caused by mechanical shock, vibration, and thermal cycling.

Key Features

LOCTITE 272 requires no mixing and applies straight from the bottle, simplifying assembly-line workflows. It offers medium viscosity (4,000–15,000 mPa·s) for controlled application on large-diameter threads without excessive run-off. The cured adhesive maintains structural integrity from sub-zero conditions through elevated operating temperatures and resists a broad range of industrial fluids, including motor oil, gasoline, toluene, and phosphate ester. Because it's a high-strength, permanent threadlocker, disassembly requires localized heating to roughly 250°C — a deliberate design feature that prevents accidental loosening in safety-critical assemblies.

Performance Data

After 24 hours of cure at 22°C, LOCTITE 272 delivers a breakaway torque of 23 N·m and prevail torque of 25 N·m on M10 steel nuts and bolts, with compressive shear strength of ≥14.5 N/mm² on steel pins and collars. Strength continues to build with extended cure (≥20 N/mm² after 72 hours at 200°C), and the adhesive retains roughly 70% of its strength even at 200°C hot-strength testing. Cure speed accelerates significantly with the use of LOCTITE Activator SF 7471 or SF 7649, which is especially valuable on passive substrates like zinc dichromate or stainless steel where natural anaerobic cure is slower.

Applications

LOCTITE 272 high-strength threadlocker is widely specified for large bolt and stud locking in pumps, compressors, structural steel connections, heavy equipment, and machinery subject to continuous vibration. It's equally effective as a thread sealant for hydraulic and pneumatic fittings, where a 360° bead applied to the leading threads fills voids and prevents leak paths. Typical industries include oil and gas, heavy manufacturing, construction equipment, power generation, and any application demanding a permanent, vibration-resistant fastener lock.

Directions for Use

For best results, clean threads with a LOCTITE cleaning solvent before application. On inactive metals or where cure speed needs acceleration, spray threads with Activator SF 7471 or SF 7649 and allow to dry. For thru-holes, apply several drops at the nut engagement area; for blind holes, apply down the internal threads to the bottom of the hole. Assemble and tighten as normal — full cure develops within 24 hours at room temperature. To disassemble, apply localized heat to approximately 250°C before loosening. Cured residue can be removed by soaking in LOCTITE 7200 solvent followed by mechanical scraping, then wiping with LOCTITE Cleaner 7063.

Why Buy From Tapemart

Tapemart is an authorized LOCTITE distributor supplying genuine, factory-fresh LOCTITE 272 high-strength threadlocker to industrial, MRO, and OEM customers. We stock a full range of LOCTITE anaerobic threadlockers, retaining compounds, and activators, backed by fast shipping and technical support to help you select the right product for your bolt-locking application. Order LOCTITE 272 online from Tapemart today and get permanent, vibration-proof thread locking you can rely on.