Document YG9rXG8pNgepEGkq6pn6pZVEk

Engineering Material Specification',' -----------------------------------------------:-------------------:-------------------- ^------ -------- :--;----------- Material Nam* Spaettlcetion Number CASKET, ASBES70S/NTTRILE BUTADIENE RUBBER , E M> ESF-M8G65-A 1. SCOPE The material defined by this specification is a nitrile butadiene rubber, asbestos material iv v with an antistick coating on both sides. i 2. APPLICATION This specification was released originally for material used as a gasket on the carburetor choke housing cover. t-'vr.S REQUIREMENTS #8 3.1 COMPRESSIBILITY, min (ASTM F 36, 1000 psi (6.8 MPa) load) 12% Recovery, min 40% 3.2 TENSILE STRENGTH, min (ASTM F 104, Type l) 2000 psi (13.8 MPa) 3.3 IMMERSION IN LIQUIDS (ASTM D 471, 22 h at 23 2C) Immersion Fluid Weight Change, max ASTM Oil No. 3 ASTM Reference Fuel "B" Water 40% 35% 40% 3.4 SURFACE COATING Must not stick Test Method: A 5/8 in (15.S mm) 1,D. x 1-1/2 in (38.1 mm) O.D. test specimen is clamped between 2 discs cf 17/32 in (13.5 mm) l.D. x 2 in (51 mm) O.D. aluminum plates (maximum thickness 0.062 in (1.57 mm) backed by 1/2 in 112.7 mm) steel plates. A 1/2 in (12.7 mm) steel bolt is inserted through the hole and a nut put on it. Tighten the bolt to 700 in.lb (79 N*m). Heat the essembly to 149 + 3C for 5 h. Remove and allow to cool to room temperature. The specimen shalTcome off the aluminum without tearing. 3.5 SUPPLIER'S RESPONSIBILITY Meterial supplied to this specification must -be equivalent to that originally approved. Changes in formulation or processing slteS^ot be made without prior approval es described in Supplier Procedure 1-A. APPROVAL OF 8UPPLIER3 (pVEf?) Suppliers to this specification must be spproved by the effected product engineering office. Procedure for gaining approval of a specific material to a new/existing ES-M specification is contained in Supplier Procedure 3-A. Approved new suppliers will be added to the Engineering Materials Approved Source List. Date Fate. No. Revisions ! 30 17 I 11964 03 02 M 3M8-" Molricated. Renumbered & Retyped c'J*'KQ7f~tiio* soprtnf Released F6-1268 <, V Ptgt _Lo1 Jl B001 1348