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MIL-I-24768 1992 Edition, February 25, 1992
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INSULATION, PLASTICS, LAMINATED, THERMOSETTING; GENERAL SPECIFICATION FOR
Includes all amendments and changes through Supplement 1, Amendment 2, December 8, 1992
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This specification covers thermosetting plastic laminated insulation materials for mechanical and electrical military applications.

The form and type of insulation shall be as specified in the applicable specification sheet (see 3.1 and 6.2.1).

The types of insulation grouped according to the base material used, shall be as follows:

a. Cotton Fabric Base, Phenolic-Resin Binder
         FBE       -  Cotton Fabric Base, Phenolic-Resin, Electrical Grade
        
         FBG       -  Cotton Fabric Base, Phenolic-Resin, General Purpose

         FBI       -  Cotton Fabric Base, Phenolic-Resin, Machining Applications

         FBM       -  Cotton Fabric Base, Phenolic-Resin, Mechanical Grade


Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 55Z3, Department of the Navy, Washington, DC 20362-5101 by using a self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

b. Glass Fabric, Base, Epoxy-Resin Binder
         GEE       -  Glass Fabric Base, Epoxy-Resin, Electrical Grade

         GEB       -  Glass Fabric Base, Epoxy-Resin, High Temperature Electrical Grade

         GEE-F     -  Glass Fabric Base, Epoxy-Resin, Flame Resistant, Electrical Grade

         GEB-F     -  Glass Fabric Base, Epoxy-Resin, High Temperature, Flame Resistant,
                      Electrical Grade




c. Glass Fabric Base, Melamine-Resin Binder
         GME       -  Glass Fabric Base, Melamine-Resin, Electrical Grade

         GMG       -  Glass Fabric Base, Melamine-Resin, General Purpose




d. Glass Mat Base, Polyester-Resin Binder
         GPO N-1   -  Glass Mat Base, Polyester-Resin, Mechanical Grade

         GPO N-2   -  Glass Mat Base, Polyester-Resin, Low Flammability and Self-extinguishing
                      Properties, General Purpose

         GPO N-3   -  Glass Mat Base, Polyester-Resin, Track Resistance, Low Flammability and
                      Self-extinguishing Properties, General Purpose

         GPO N-1P  -  Glass Mat Base, Polyester-Resin, Mechanical Grade, Punching
                      Characteristics

         GPO N-2P  -  Glass Mat Base, Polyester-Resin, Low Flammability, Self-extinguishing
                      Properties, Punching Characteristics

         GPO N-3P  -  Glass Mat Base, Polyester-Resin, Track Resistance, Low Flammability,
                      Self-extinguishing Properties, Punching Characteristics




e. Glass Fabric Base, Silicone-Resin Binder
         GSG       -  Glass Fabric Base, Silicone-Resin, General Purpose




f. Glass Fabric Base, Polytetrafluoroethylene-Resin Binder
         GTE       -  Glass Fabric Base, Polytetrafluoroethylene-Resin, Electrical Grade




g. Glass Fabric Base, Phenolic-Resin Binder
         GPG       -  Glass Fabric Base, Phenolic-Resin, General Purpose




h. Nylon Fabric Base, Phenolic-Resin Binder
         NPG       -  Nylon Fabric Base, Phenolic-Resin, General Purpose




i. Paper Base, Phenolic-Resin Binder
         PBE       -  Paper Base, Phenolic-Resin, Electrical Grade

         PBG       -  Paper Base, Phenolic-Resin, General Purpose

         PBM       -  Paper Base, Phenolic-Resin, Mechanical Grade

         PBM-P     -  Paper Base, Phenolic-Resin, Hot Punching Stock, Mechanical Grade

         PBM-PC    -  Paper Base, Phenolic-Resin, Cold Punching and Shearing Stock,
                      Mechanical Grade

         PBG-P     -  Paper Base, Phenolic-Resin, Hot Punching Stock, General Purpose

         PBE-P     -  Paper Base, Phenolic-Resin, Hot Punching Stock, Electrical Grade

         PBE-PC    -  Paper Base, Phenolic-Resin, Cold Punching Stock, Electrical Grade

         PBM-PF    -  Paper Base, Phenolic-Resin, Hot Punching Stock, Flame Resistant,
                      Mechanical Grade

         PBE-PCF   -  Paper Base, Phenolic-Resin, Cold Punching Stock, Flame Resistant,
                      Electrical Grade




j. Paper Base, Epoxy-Resin Binder
         PEE       -  Paper Base, Epoxy-Resin, Flame Resistant, Electrical Grade




k. Continuous Filament Glass Cloth, Epoxy-Resin Binder
         CEM-1     -  Glass Cloth Base, Epoxy-Resin, Cellulose Core

         CEM-3     -  Glass Cloth Base, Epoxy-Resin, Nonwoven Core




The insulation forms shall be as follows:
    Form R - Rods
    Form S - Sheets
    Form TRR - Tubes, rolled, round
    Form TMR - Tubes, molded, round.




The sizes of insulation shall be as specified in the individual specification sheets (see 3.1).