National Item Identification Number
National Stock Number
Federal Supply Class
Any material specifically designed and constructed to resist deterioration from the action of heat, gas, chemicals or liquids and used to create a tight seal. It is supplied in loose form or in coils, spirals, spools or cut lengths, usually having a square or round cross section. For rubber items having a round cross section, see RUBBER ROUND SECTION. Excludes ROPE, ASBESTOS; CALKING COTTON; and CALKING LEAD. See also PACKING, PREFORMED; and OAKUM.
Commercial and Government Entity Code (Supplier Data)
Reference Numbers (Part Numbers)
M21F1418 ITEM 7