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Small silver tube Loctite 660 retaining compound 6ml

Loctite

Loctite 660 Quick Metal Gap Filler 6ml Silver

SKU CH-9JT0-MMG28

High-viscosity retaining compound fills gaps up to 0.02 in on steel parts, cures in 15 minutes and withstands -65 °F to 300 °F

  • TypeThreadlockers and Retaining Compounds
  • Size6ml
  • ColorSilver
  • Color MappingSilver
  • Fills gaps up to 0.02 in with high-viscosity urethane methacrylate
  • Withstands -65 °F to 300 °F operating range
  • Reaches 2,490 psi shear strength after full cure
  • Sets in 15 minutes for quick assembly work
  • Meets 29 CFR 1910.1200 hazard-communication standard

High-Viscosity Retaining Compound

Loctite 660 is a urethane methacrylate retaining compound designed to bond loose-fitting steel parts. It fills gaps up to 0.02 inches and cures to a silver finish with a shear strength of 490 psi. The product suits mechanics and cyclists repairing worn shafts, housings or bearings where a press fit is no longer possible.

Gap Limits and Cure Requirements

Maximum gap fill is 0.02 inches, so parts with wider clearance will not achieve full strength. A primer is required before application to ensure proper curing on inactive surfaces. Full cure takes one day at room temperature, while the working time allows 15 minutes for assembly. Operating range spans -65 to 300 degrees F.

Compatibility Checks Before Use

Verify that the parts are steel and that the gap does not exceed 0.02 inches. Confirm you have a compatible primer for inactive metals such as stainless steel or plated surfaces. Ensure the repair can remain undisturbed for 24 hours to reach full strength. Clean-up requires solvent and a wire brush once cured.

Highlights

  • Fills gaps up to 0.02 in with high-viscosity urethane methacrylate
  • Withstands -65 °F to 300 °F operating range
  • Reaches 2,490 psi shear strength after full cure
  • Sets in 15 minutes for quick assembly work
  • Meets 29 CFR 1910.1200 hazard-communication standard

Specifications

BrandLoctite
TypeThreadlockers and Retaining Compounds
Size6ml
ColorSilver
Color MappingSilver

Questions about this item

Which Loctite 660 tube size should I pick?

The only size listed is the 6ml tube, supplied as a single unit for small retaining jobs.

What does the 2,490 psi shear strength mean once the compound cures?

After a full day at room temperature the bond holds roughly 2,490 psi in shear, so a loose steel fit can transmit significant torque without slipping.

How does the 0.02 in maximum gap fill limit what I can repair?

The product is rated to bridge gaps up to 0.02 in; larger clearances will not be filled reliably and may leave voids that weaken the joint.

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