Installation Instructions Model 474 Mechanical Joint Tapping Sleeve Failure to follow installation instructions will result in voided product warranty. For Fittings Equipped With Stainless Steel Bolts and Nuts
When not properly handled it is the nature of stainless steel fasteners to gall and freeze (seize up). This is due to the inherent properties of the stainless material. Galling and freezing is often triggered by the presence of metal chips, burrs and grains of sand on the threads of the bolts and nuts. Extra care has been taken by JCM prior to assembly and packing of this fitting to assure a trouble-free installation. 1. The nuts and bolts are made from material of different hardness so that they have different strengths. 2. Nuts are coated with a special anti-seize coating. Additional lubricant may be needed. A Molybdenum-Base lubricant is recommended. 3. Each nut is assembled by hand to be sure that it went on the bolt freely. 4. The bolts and nuts are handled carefully to avoid damage to the threads. 5. The bolts and nuts are made to exacting specifications to assure that the correct material is used and that the thread form is correct. Stainless hardware is especially susceptible to galling. JCM supplies specially coated nuts to eliminate the galling caused by over-torquing, but the bolt threads must be kept clean, free from nicks and not pitched or thrown into the tool bucket during the installation process. Use of the JCM 901 Master Wrench or JCM 905 Torque Wrench with Deep Socket is highly recommended. Use of pneumatic wrench for installation could cause hardware to seize and is not recommended.
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