Insert for a power tool housing

A tool 100 having a motor (132, Figure 3), such as a pneumatic or hydraulic impact wrench, includes a nose housing 108 and a housing 102 with an aperture 110 adapted to receive a fastener 112 to apply a clamping force. An insert 114 having opposed first and second sides (120, 122, Figure 4) is disposed within the aperture. The first side is disposed proximal to a head of the fastener. The second side is disposed proximal to the motor. An insert aperture 124 may extend through the insert to receive the fastener. An exterior surface 126 corresponds to the housing aperture. The nose housing and the insert may be composed of a material resistant to creep and stress relaxation, such as a metal material. The housing may be plastic. The fastener may be threadably coupled to the nose housing. A seal 118, such as an O-ring, may be disposed between the insert and the head of the fastener. The insert may be circular in cross-section and/or include a chamfer 116. The insert may include a barb (228, Figure 5). The insert removes the housing from the load path of the clamping force to reduce the possibility of fluid leaks.