Appendix

ITW Fastex® Plastic Fastener Manufacturer

SCREW GROMMETS

TEST DATA (REPRESENTATIVE SAMPLES)
Part Number Screw Size Driving Torque* Stripping Torque*
242-160502-70 6 2-4 in.-lb. 10-15 in.-lb.
  8 4-6 in.-lb. 14-21 in.-lb.
242-170602-80 8 3-5 in.-lb. 11-17 in.-lb.
  10 5-8 in.-lb. 16-28 in.-lb.
242-180602-91 8 4-6 in.-lb. 13-21 in.-lb.
  10 6-9 in.-lb. 20-31 in.-lb.

*NOTE-WHEN INSTALLING GROMMETS:
  1. It is desirable that the burr side of the hole be opposite the grommet entry.

  2. The surface condition of the hole edge has a definite bearing on the ease with which a grommet can be inserted and how well it will fit and hold until the screw is driven. For instance, the smaller end of the hole size range, when used with a porcelainized surface, can provide a leak proof fit. Indicated hole sizes are final, i.e.; after painting, enameling, etc. For hole sizes that will provide the best combinations of easy installation and secure fit, the following can serve as a general guide:

    SURFACE CONDITION HOLE SIZE
    Porcelain Small end of indicated range
    Enamel Slightly below mid range
    Paint Middle of indicated range
    Plastic Panel Middle of indicated range
    Raw Metal Large end of indicated range

  3. Driving torque and stripping torque will generally increase with decreasing hole sizes and increasing panel thickness:

Part Number Screw Size Driving Torque Stripping Torque
242-180602-92 8 5-7 in.-lb. 15-22 in.-lb.
  10 8-10 in.-lb. 25-30 in.-lb.
242-180602-93 8 7-9 in.-lb. 22-28 in.-lb.
  10 9-14 in.-lb. 30-45 in.-lb.
242-210602-10 1/4" 12-17 in.-lb. 30-45 in.-lb.

Note: †Driving and stripping torques will vary depending on panel hole size, panel thickness, and screw type used. In all cases, however, the stripping torque is at least 250% of the driving torque.

Note: Dimensions listed are nominal.


Appendix

ITW Fastex®
ITW Fastex® - U.S.
195 Algonquin Road,
Des Plaines, IL 60016
Phone: 847-299-2222
Fax: 847-390-8727
ITW Fastex® - Asia
A4, No.3-2 K.E.P.Z.
Kaohsiung, Taiwan R.O.C.
Phone: 886-7-811-9206-10
Fax: 886-7-811-1795 / 811-0332
sales@itweba.com

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