Prevents Nuts and Bolts from Loosening with Vibration
Our 3M Scotch-Weld Threadlocker TL71 hardens and seals threaded assemblies to resist vibration and prevent loosening or leakage of secured fasteners. Applying this adhesive to fasteners before tightening seals out moisture and prevents corrosion. Application is fast and easy with just a targeted squeeze of the bottle. The anaerobic formulation begins to cure quickly into a polymer that seals, secures, and retains. An activator can be used for even faster cure or larger gap sizes. The high strength adhesive is only removable through high heat application.
Recommended Applications
- Threadlocking of screws, bolts and nuts
- Applications vary by temperature resistance, removability and oil tolerance
Eliminates the Need for Lock Washers and Other Locking Components
Our 3M Scotch-Weld Threadlocker TL71 is effective for locking, vibration resistance, sealing, and bonding threaded assemblies. Places where it is useful include machine tool access bolts, hydraulic system bolts, gear box/driveshaft bolts, bearing cover cap screws, countersunk screws and conveyor roller bolts.
Understanding Anaerobic Adhesives
Anaerobic adhesives are uniquely formulated to cure in the absence of oxygen. The term “anaerobic” means “living without air” and when the oxygen is excluded, a chemical chain reaction begins that causes the adhesive to polymerize. Contact with metal speeds the polymerization process and rapidly accelerates the curing process, forming tough cross-linked plastic that provides aggressive adhesion with effective shear strength.
More commonly referred to as threadlockers, pipe sealants, retaining compounds, and gasket makers, these adhesives are often used to enhance the seal, or holding force, in the threads of joined fastener systems such as nut-and-bolt assemblies. A nut-and-bolt assembly may have as little as 15% metal-to-metal contact and even a small amount of anaerobic adhesive readily fills any air voids between the threads and then hardens to a thermoset plastic. These unique adhesives are easy-to-dispense, cure rapidly, and provide effective torque strength while resisting temperature and vibration and sealing out moisture and gasses to protect against corrosion. Anaerobic adhesives can decrease manufacturing costs, enhance equipment reliability, minimize aftermarket breakdown, and reduce warranty claims.

3M 20942, Scotch-Weld Urethane Adhesive 3549, Brown, Part A, 5 Gallon Drum, (Pail), 7100041738
3M™ 72016, Remote Alarm & Strobe 529-05-20, Audible, 7000131708, 1 EA/Case
3M 18451, Scotch-Brite Heavy Duty Hand Pad 7440B, HP-HP, A/O Medium, 6 in x 9 in, 7000000715, 40 ea/Case
3M™ 72787, Calibration Kit 529-04-48, Large, 7000052154, 1 EA/Case
Dynabrade 78425 4-1/2" Dia. x 3/8" Coarse DynaBrite Surface Conditioning Disc, 25/pack
3M 05508, Marine Adhesive Sealant 4000 UV, White, 600 mL Sausage Pack, 7010330455, 12/Case
3M 45714, Cubitron II Hookit Cloth Disc 947A, 120+ X-weight, 3 in x NH, D/F 3HL, Die 300BE, 7100113113
3M 77197, Scotch-Brite™ Roloc™ Deburr and Finish PRO Unitized Wheel,TR, 3 in x 1/8 in x NH, 8C CRS+, 7100109130, 40/box
3M 53914, Performance Plus Duct Tape 8979N Nuclear Red, 48 mm x 54.8 m 12.1 mil, 7000049014, 24/ case
3M™ 07011, Supplied Air Respirator Hose W-9435-50/07011(AAD), 7000005373, 1 EA/Case
ACS CX1250 Diamond Belt, 1/2" X 24" 60u
3M™ 53797, Flexible Diamond Belt 6451J, 1/2" Dia x 18" L, M125 Micron, Type G, Pattern B2, 7010509272
Dynabrade 97570 1/2" NPT Female Safety Coupler
Norton 66623325035 - 2" 120 Grit Fine Grade Aluminum Oxide Vortex Rapid Prep Green TR Non-Woven Surface Preparation Disc, 50 Each
3M 01334, PSA Cloth Disc 348D, 50 X-weight, 3 in x NH, Die 300V, 7000118879
Standard Abrasives 725008, Buff and Blend Cross Buff HP, A/O Very Fine, 1 in x 3/8 in x 2 Ply x 8-32, 7000046829
3M 36516, Green Corps Abrasive File Belt, 40 grit, 1/2 in x 18 in (12.7 mm x 457.2 mm), 7100225352, 20 Belts Per Carton, 5 Cartons Per Case
3M 04029, Scotch-Brite Hand Pad 7447, HP-HP, A/O Very Fine, Maroon, 6 in x 9 in, 7000000728, 60/Case
Dynabrade 51750 .1 hp Straight-Line Extension Pencil Grinder, Rear Exhaust, 60,000 RPM, 1/8" Collet
3M 49054, Polyurethane Sealant 540, White, 310 mL Cartridge, 7000000941, 12/Case
Insize ISV-K1810, VIDEOSCOPE, lens diameter .071", cable length 40", 6940561973402
3M 07148, Dual Airline Back-Mounted Breathing Tube SA-2500/07148(AAD), 7000002006, 1 EA/Case
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander
3M 35827, Hookit Dust Extraction Flexible Sanding Block, 273 mm x 67 mm, 7100256623
3M 71358, 641WY 1/4" X 24", 600 Mesh Diamond Cloth Belt, 7010534894
Dynabrade 14360 Pneumatic Pipe Belt Finisher
3M 26054, PPS Series 2.0 Adapter, Type S18, 3/8 Female, 18 Thread NPS,
4 per case
3M 91773, Scotch Super Glue Liquid in Precision Applicator, AD124, .14 oz (4 g), 7100045780
Dynabrade 11684 Dynabelter Contact Arm Assembly 4" DIA X 5/8" W., 40 Duro Serrated
3M 01328, PSA Cloth Disc 348D, P180 X-weight, 3 in x NH, Die 300V, 7000045068
Dynabrade 78423 4-1/2" Dia. x 3/8" Very Fine DynaBrite Surface Conditioning Disc, 25/pack
3M 02960, Scotch-Brite Cut and Polish Wheel, CP-WL, 5A Fine, 6 in x 1 in x 1 in, 7100009186, Box of 3
3M 05530, Stikit Soft Hand Pad, 2-3/4 in x 5-1/2 in x 3/8 in, 7000028351
Norton 66261014936 3" DIA X 1/8" Thick, Bear-Tex NEX Rapid Blend Quick-Change Type III Non-Woven Unified Wheel, 40 Each
3M 56788, Stacked Lens Cover FF-400-18, 7010385198
3M™ 72010, Replacement Filter Kit 523-01-29, 7000056891, 1 EA/Case
3M 29821, Sanding Screen, 150 Grit, 20 in x NH, 7100160254
3M 26582, Accuspray Refill Pack for PPS Series 2.0, Blue, 1.2 mm, 7100152952
Norton 66261013403 - 3" X 1/2" Extra Coarse Grade Silicon Carbide Bear-Tex Rapid Strip TR Stripping Disc, 10 Each
3M 33349, 641WY 1/4" X 24", 220 Mesh Diamond Cloth Belt, 7010534919
3M 11137, Roloc Disc 361F, 50 YF-weight, TR, 1-1/2 in, Die R150S, 7000045094
3M 88892, PSA Cloth Disc 348D, 60 X-weight, 15 in x NH, Die 1500A, 7010360718
3M 33440, Cubitron II File Belt, 33440, 80+, 10 mm x 330 mm (3/8 in x 13 in), 7100033195, 10 belts per carton, 5 cartons per case 
