5340-12-317-3578

6340-14-408-3190 6340144083190 144083190 is a rigid or flexible item of various shapes attached to a structure for the purpose of providing access for inspection, service, replacement of components and/or adjustments or mounting operations. it is designed to be attached by means of bolt holes, slots, mounting ears, tabs, and the like. to permit access, the mounted cover requires partial or complete removal. it may include an observation window. for items permanently attached by hinges and the like, see door, access (as modified). excludes all covers not specifically designed to provide access for the purposes listed above.

5305-14-478-5447 5305144785447 144785447 is an externally threaded fastener whose threaded portion is of one nominal diameter. the head has an internal socket or multiple spline for use with an inserted driver. a locking feature may be incorporated in the design of the head or threads. excludes items with bevel (conical) heads. see bolt, internal wrenching. excludes screw, shoulder; and screw, machine.

3040-01-408-3190 3040014083190 014083190 is an item designed to be mounted around a shaft to limit axial movement of the shaft and/or its assembled parts. it is secured directly to the shaft by use of a setscrew(s), pin(s), or the like, which may be a part of the item of supply. a pilot hole drilled in or through the wall(s) for drilling and pinning at application may be considered a method of securing. solid items have a bearing surface on one or both end(s) perpendicular to the axis. for items designed to be mounted around the extended hub portion of a mounted item on a shaft or clamp around a shaft, see clamp, hub. see also bearing, sleeve; bushing, sleeve; spacer, sleeve; and coupling, shaft, rigid.

1560-00-478-5447 1560004785447 004785447

2805-99-408-3190 2805994083190 994083190