A pre-assembled female mould arrangement for being installed on a moulding machine, the pre-assembled female mould arrangement comprising: an annular forming element, extending about an axis and delimiting a forming cavity about said axis; a plate element, which delimits the forming cavity transversely to said axis; a peripheral annular component that surrounds at least partially the annular forming element; a supporting base;
a fastening element which is so mounted as to render the annular forming element fixed relative to the plate element.

A pre-assembled female mould arrangement for being installed on a moulding machine, the pre-assembled female mould arrangement comprising: an annular forming element, extending about an axis and delimiting a forming cavity about said axis; a plate element, which delimits the forming cavity transversely to said axis; a peripheral annular component that surrounds at least partially the annular forming element; a supporting base;
a fastening element which is so mounted as to render the annular forming element fixed relative to the plate element.

A fastener holding spanner comprises a spanner head defining an aperture capable of engaging during use with a correspondingly-sized nut or bolt head of a fastener, with a clearance there-between, and at least one arm extending from the spanner head. During use of the spanner one of the at least one arms is capable of engaging with an abutment surface adjacent to a nut or bolt head of a fastener engaged by the spanner head upon rotation of the nut or bolt head under applied torque. The aperture comprises a plurality of internal faces, at least two of which are engaging faces. The engaging faces are substantially flat and are arranged to engage with flat faces of a nut or bolt head engaged by the spanner during use. At least one of the internal faces of the aperture is non-engaging with the nut or bolt head during use, the at least one non-engaging face located in between the at least two engaging faces. The aperture further comprises at least one through passage penetrating at least one of the internal faces, the at least one through passage having a longitudinal axis and being at least partially threaded over at least part of its length. In use a threaded member having a flat end may be screwed into the at least one passage, the flat end of the threaded member to contact under pressure a face of a nut or bolt head engaged by the spanner to prevent relative rotation between the spanner and the nut or bolt head. At least two engaging faces of the aperture are distal from the threaded member and located on opposing sides of the longitudinal axis of the at least one through passage.

A fastener holding spanner comprises a spanner head defining an aperture capable of engaging during use with a correspondingly-sized nut or bolt head of a fastener, with a clearance there-between, and at least one arm extending from the spanner head. During use of the spanner one of the at least one arms is capable of engaging with an abutment surface adjacent to a nut or bolt head of a fastener engaged by the spanner head upon rotation of the nut or bolt head under applied torque. The aperture comprises a plurality of internal faces, at least two of which are engaging faces. The engaging faces are substantially flat and are arranged to engage with flat faces of a nut or bolt head engaged by the spanner during use. At least one of the internal faces of the aperture is non-engaging with the nut or bolt head during use, the at least one non-engaging face located in between the at least two engaging faces. The aperture further comprises at least one through passage penetrating at least one of the internal faces, the at least one through passage having a longitudinal axis and being at least partially threaded over at least part of its length. In use a threaded member having a flat end may be screwed into the at least one passage, the flat end of the threaded member to contact under pressure a face of a nut or bolt head engaged by the spanner to prevent relative rotation between the spanner and the nut or bolt head. At least two engaging faces of the aperture are distal from the threaded member and located on opposing sides of the longitudinal axis of the at least one through passage.

A quick reciprocating wrench includes a main body, a claw, and an elastic device therebetween. The main body includes a first jaw opening having a pivot end and a block portion. The claw includes a second jaw opening having a pivotal combination portion and a retaining portion. The pivotal combination portion is pivotally connected with the pivot end, so the claw and the main body pivotally move against each other. The fastener is engaged in the first and the second jaw openings. Distance between the block portion and the neighboring force bearing face of the fastener decreases along a direction in opposite to the expansion direction of the claw and the block portion. The largest width of the distal end of the retaining portion is greater than the smallest distance between the block portion and the first force bearing face of the fastener.

A fixture for holding a barrel-shaped part, including an interior surface, in a fixed position includes a body configured to fit inside the barrel-shaped part and a support ring coupled to the body. The support ring includes a peripheral channel. The fixture further includes a bladder tube engaged with the peripheral channel of the support ring and inflatable to engage the interior surface of the barrel-shaped part when the body is inside the barrel-shaped part.

A fixture for holding a barrel-shaped part, including an interior surface, in a fixed position includes a body configured to fit inside the barrel-shaped part and a support ring coupled to the body. The support ring includes a peripheral channel. The fixture further includes a bladder tube engaged with the peripheral channel of the support ring and inflatable to engage the interior surface of the barrel-shaped part when the body is inside the barrel-shaped part.

The wrench with position-retaining tab comprises the box wrench and a position-retaining structure. The box wrench is a hand tool used for tightening and loosening a threaded connection formed by a bolt or bolt-like structure. The box wrench and the threaded connection are defined elsewhere in this disclosure. The position-retaining structure attaches to the box wrench. The position retaining structure is a spring-loaded structure that inhibits the box wrench from slipping off the bolt or bolt-like structure during the tightening and loosening of the threaded connection.

The wrench with position-retaining tab comprises the box wrench and a position-retaining structure. The box wrench is a hand tool used for tightening and loosening a threaded connection formed by a bolt or bolt-like structure. The box wrench and the threaded connection are defined elsewhere in this disclosure. The position-retaining structure attaches to the box wrench. The position retaining structure is a spring-loaded structure that inhibits the box wrench from slipping off the bolt or bolt-like structure during the tightening and loosening of the threaded connection.

A spanner for simultaneously gripping a plurality of fasteners. The spanner includes a body, the body having a plurality of spaced apart fastener grips for simultaneously gripping the plurality of fasteners. The spanner also includes at least one attachment member for attaching the spanner to a structure the fasteners attach to.