2520-12-197-2654

5331-14-251-9188 5331142519188 142519188 is a nonmetallic circular item with an aperature, having a solid round cross-section. they are used primarily for sealing. for items with other than round cross section, see packing,preformed. for noncircular items with a round cross-section, see seal,nonmetallic round section and rubber,round section.

5306-01-251-9188 5306012519188 012519188 is an externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. the threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. the head is not designed to be held or driven with an inserted driver or by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. for items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. see also screw, cap, hexagon head and screw, machine.

5845-00-251-9188 5845002519188 002519188

1398-99-251-9188 1398992519188 992519188 PAD,CUSHIONING

4320-22-251-9188 4320222519188 222519188 is an item specifically designed to fit over the opening(s) of various items to provide mechanical protection and/or to prevent the entrance of foreign matter during painting, shipping, storage, or the like. it is not designed to retain fluids under pressure during equipment operation. excludes cover, electrical connector; hood, sealing, bottle; and stopper, bottle. for items designed to fit into or over the opening(s) of various items, see cap-plug, protective, dust and moisture seal.