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ST-1200 Line Size 4 - Thick Panel Grommets

Type 127S-A and 127S-F thick panel grommets are supplied attached to their studs. The bead securing the grommet to the stud is close to the head to allow maximum retraction of the stud end into the panel. These grommets are offered in standard lengths, matching common panel thickness with ends extended beyond the panel, for retention by flaring. Other lengths are available on special order.

Thick Panel Grommets Picture
Type 127S-F: Flush heads only Type 127S-A: Protruding heads only
Flush Head Thick Panel Grommet Dimension Drawing Oval Head Stud Thick Panel Grommet Dimension Drawing

Stud/Grommet Assembly Callout:

  1. Determine stud length as directed by instructions provided for the selected receptacle.
  2. The 127S-A or 127S-F grommet length (dimension "T") is equal to the panel thickness plus the grommet end flaring allowance.
  3. If the panel thickness is greater than "Dimension P" listed in the table, go to the next larger listing. (For example: For size 4, if the panel is .275" thick, use Dimension P = .375 in the table.)
  4. The stud grommet assembly is called out by first stating the stud part number, followed by "T", followed by the grommet's "T" dimension in thousandths of an inch. (For example: 121J-450T175)

Grommet Size Dimension "M"
Grommet Diameter
Dimension "N"
Grommet Wall Thickness
End Flaring Allowance
4 5/16"
(7.95 mm)
(.64 mm)
(1.91 mm)

Dimension "P" Dimension "T"
inch mm inch mm
*T175 .101 2.57 .175 4.45
*T325 .250 6.35 .325 8.26
*T450 .375 9.53 .450 11.43
*T575 .500 12.70 .575 14.61
*T700 .625 15.88 .700 17.78
*T825 .750 19.05 .825 20.96

* Represents the stud part number (e.g., 121J-450 from the above example).