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6th Edition, August 1, 2017

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Retaining Compound, Anaerobic, High Temperature, Low Viscosity



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Product Details:

  • Revision: 6th Edition, August 1, 2017
  • Published Date: August 2017
  • Status: Active, Most Current
  • Document Language: English
  • Published By: General Motors Company (GMNA)
  • Page Count: 5
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

Material Description. A low viscosity, slow curing green anaerobic dimethylacrylate polyester resin base liquid compound that solidifies by polymerization (not by solvent evaporation) into a tough plastic when confined between closely fitted metal surfaces. This material may be used on slightly oiled cadmium and zinc plated, black oxide, and phosphate and oil coated parts and still obtain satisfactory properties. For maximum properties, parts must be cleaned.

Symbols. None.

Applicability. This material is intended for supplementing press fits or bonding slip fitted cylindrical parts. Material shall be capable of obtaining full retaining and/or locking strength with gap thickness to 0.10 mm diametral and seal with gap thicknesses to 0.25 mm using the ASTM D4562 or ISO 10123 static shear strength pin and collar tests. The material curing time may be substantially reduced with accelerators or heat. This is not to be used for press fit cup plugs.

Temperature Use Range. It is best suited for application where temperatures range from -54 °C to 200 °C. Low temperature performance is based on maintaining 50% or more of the original minimum static shear strength after 2 h exposure (measure in 30 s or less). The low temperature test is not required for this standard. The upper temperature limit is based on Table 3 aging requirements.

Remarks. The words must, shall or will as used in this document mean a mandatory requirement.

Application of the product outside its use category (retaining) as defined by GMW16800, 7.1.10.2 is strictly prohibited.

Preferential bonding to one surface (adhesive failure) can be an indicator of surface contamination or inactivity if the metal is different.

Use of automated application dispensing system equipment designed for this product provides a measured uniform liquid coating. Contact the product manufacturer for equipment recommendations.

Test Result Perspective. Steel Pin and Collar forms are used to establish and compare diametral gap limit, cure speed and strength between retaining compounds. Test this product on end use surfaces as the metal reactivity (see 1.4.7) and production surface cleanliness affecting cure speed and strength to gap may be different from the values in this specification.

Container Size. No anaerobic container is more than 1 L because pressure on the product in the container can cause curing. Do not transfer anaerobic into an unauthorized or contaminated container.

Product Change Breakpoint. In September 2013 the manufacturer announced formulation improvements in primer-less cure and surface oil tolerance from original formulation approved in 1974. The revised product chemistry is represented in Table 1, Table 2 and Table 3.

Reactive Surfaces. Anaerobics bond with active metal ions and cure in the absence of air. The following are very reactive; brass, copper, manganese, followed by active; aluminum, bronze, iron, nickel and steel. Inactive metals are annodized aluminum, cadmium, chrome finishes, Inconel, magnesium, plated parts, galvanized steel, stainless steel, titanium and zinc. Small percentages of copper or other active metals are added to inactive compositions to promote anaerobic curing. Borate and nitrate cleaning residues will retard bonding and cure.