Xerox Phaser 7400

Service Parts Disassembly 8-7
Fastener Types
The following table lists the primary types of Posi-Drive screws used to assemble the
printer. The procedures provide dimensional specifications for screws being removed.
Caution
Use care when installing self-tapping screws in plastic. To properly start the
screw in plastic, turn the screw counter-clockwise in the hole until you feel the
screw engage the threads, then tighten as usual. Failure to properly align or over
tighten the screw can result in damage to previously tapped threads.
Posi-Drive Screw Types used in the Printer
Type Application Shape Characteristics
Self-tapping,
plastic
1. Black colored.
2. Screw thread is coarse
compared to metal screw.
3. Screw tip is thin.
Self-tapping,
plastic with
flange
1. Black colored.
2. It has a flange.
3. Screw thread is coarse
compared to metal screw.
4. Screw tip is thin.
Sheet Metal,
silver
1. Silver colored.
2. Diameter is uniform.
Sheet Metal.
with flange
1. Silver colored.
2. It has a flange.
3. Diameter is uniform.
4. Typically 6 mm or 10 mm in
length.
Sheet Metal,
silver with
lock washer
1. Silver colored.
2. Diameter is uniform.
3. Typically 6 mm in length.
Sheet Metal,
silver with
toothed
washer
1. Silver colored.
2. Includes a toothed washer.
3. Diameter is uniform.
4. Used for grounding terminals.
Parts etc Plastic
Coarse
Parts etc Plastic
Coarse
Parts etc Sheet metal
Parts etc Sheet metal
Parts Etc. Sheet Metal
Lock
Washe
r
Parts etc Sheet metal