Screw - Tightening Information

^{IBM-AUSTRIA - PC-HW-Support 30 Aug 1999}

Screw - Tightening Information

Screw - Tightening Information

ThinkPad/WorkPad - SCREW KIT FRUs
A new range of FRU Screw Kits have been released for various Thinkpad/WorkPad Models.These new Screw Kits contain Nylock screws where the thread of the screws have been coated with Nylon to ensure that the appropriate screw torque is maintained for the life of the product.

They maintain tight connections.
They do not easily come loose, even with shock or vibration.
They need additional force to tighten.
The should be used only once.

Do the following when you service one of the below listed machines:

Keep the screw kit in your tool bag.
Always use new screws.
Use a torque screwdriver if available. (see below 'Screw Tightening Information')

The following screw FRU part numbers have been made available for servicers.
Bulk, kit, and individual screw FRUs are listed.
Use the appropreate FRU P/N that correspond to your usage of screw FRUs.

D/T FRU P/N Qty Description ------------------------------------------------------------ 2608 | 05K5941 Kit Various screws incl. Nyloc ------------------------------------------------------------ 2609 | 10L1956 Kit Various screws incl. Nyloc ------------------------------------------------------------ 2611 | 05K5687 Kit Various screws incl. Nyloc ----------------------------------------------------------- 2635 | 05K4313 Kit 2 M2.5 x 8mm Nyloc screws 2635 | " 5 M2.5 x 8mm Nyloc screws 2635 | " 1 M2.5 x 16mm flat screw |------------------------------------------------ 2635 | 97H3445 1 Nyloc screw M2.5 x 6mm 2635 | 97H3446 1 Nyloc screw M2.5 x 8mm 2635 | 05K4314 1 Nyloc screw M2.5 x 25mm ----------------------------------------------------------- 2635 380Z| 05K5725 9 M2.5 x 6mm Flat Head 2635 | " 1 M2.5 x 3mm Flat Head 2635 | " 1 M2.5 x 4.8mm Flat Head 2635 | " 6 Hex Stud 2635 | " 19 M2.5 x 6 Bind Black 2635 | " 7 M2.5 x 8 Bind Black 2635 | " 4 M2 x 6 Bind 2635 | " 3 M2 x 18 Bind 2635 | " 2 M2.5 x 22 Bind Nylock 2635 | " 3 M2.5 x 12 Bind Nylock 2635 | " 1 M2.6 x 4 Bind Yellow 2635 | " 3 M2.6 x 2.8 Bind Red 2635 | " 4 M2 x 1.7 Special Pan Blue 2635 | " 2 M2 x 2.4 Special Pan Yellow 2635 | " 4 M3 x 3 Flat 2635 | " 1 M2.5 x 6 Special 2635 | " 1 M2.5 x 6 Big Head Yellow 2635 | " 1 M2.5 x 25 Bind Nylock ----------------------------------------------------------- 2640 | 12J0808 Kit 4 M2.5 x 4mm 2640 | " 4 M2.5 x 4mm FLAT/LOC screws 2640 | " 19 M2.5 x 7mm BIND/LOC screws 2640 | " 2 M2.5 x 12mm BND/LOC screws 2640 | " 10 M2.5 x 16mm FLAT screws 2640 | " 1 M2.0 x 13mm PAN screw 2640 | " 6 M2.5 HEX STUD |------------------------------------------------- 2640 | 97H3917 200 Nyloc screw M2.5 x 4mm 2640 | 97H3918 1000 Nyloc screw M2.5 x 7mm 2640 | 97H3919 100 Nyloc screw M2.5 x 12mm ------------------------------------------------------------ 2644 | 05K6083 Kit Various screws incl. Nyloc ------------------------------------------------------------ 2645 | 05K4841 Kit Various screws incl. Nyloc ------------------------------------------------------------ 9545 | 05K4464 Kit Various screws incl. Nyloc ------------------------------------------------------------ 9546 | 97H3449 Kit 20 M2.5 x 4mm BW/N 9546 | " 15 M2.5 x 6mm Nyloc 9546 | " 10 M2.5 x 8mm Nyloc 9546 | " 5 M2.5 x 14mm Nyloc 9546 | " 5 M2 x 14mm PAN W/NY ------------------------------------------------------------ 9546/47 | 97H3444 1 Nyloc screw M2.5 x 4mm 9546/47 | 97H3445 1 Nyloc screw M2.5 x 6mm 9546/47 | 97H3446 1 Nyloc screw M2.5 x 8mm 9546/47 | 97H3447 1 Nyloc screw M2.5 x 14mm 9546/47 | 97H3448 1 Nyloc screw M2 x 14mm ------------------------------------------------------------ 9548/49 | 05K4478 Kit Various screws incl. Nyloc ------------------------------------------------------------

Screw Tightening Information

Loose screws can cause reliability problems. The IBM ThinkPad/WorkPad computer addresses this problem with nylon-coated screws.

Tighten screws as follows:

Plastic to Plastic

Turn an additional 90 degrees after the screw head touches the surface of the plastic part.

Logic Card to Plastic

Turn an additional 180 degrees after the screw head touches the surface of the plastic part.

Torque screw-drivers can be ordered from:

Techni-Tool 5 Apollo Road Box 368 Plymouth Meeting PA 19462 USA Phone : Sales 1-610-941-2400 Fax : 1-610-828-5623 http://www.techni-tool.com

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