MIL-DTL-22529 Grommet, Edging \(S/S By Nasm22529\)This specification covers three types of edging grommets; a plastic caterpillar style applied with an adhesive, and two spring-style, stainless steel based composite grommets requiring no adhesives. Edging grommets are used to provide abrasion protection of electrical current carrying wires and cable bundles routed through metal structures.

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MIL-DTL-22529D (AS)

4.2.7 High temperature and load deformation test. The grommets shall be

mounted in the test fixture as shown in Figure 2. The fixture with the

grommet, shall be placed in an ambient temperature for not less than 48 hours

per Table IV.

Table IV

+2�C

Grommet Type

80�

MIL-DTL-22529/2

100�

Nylon MS21266

120�

MIL-DTL-22529/1

250�

TFE MS21266

After returning to room temperature, the grommet area subjected to maximum

compression shall be cut to expose section "AA" of Figure 2. The grommet

dimensions shall conform to the requirements of 3.2.4.

4.2.8 Vibration test. The grommets shall be mounted in the test fixture

as shown in Figure 1, and subjected to the vibration test in accordance with

MIL-STD-202, Method 201A. The grommets shall conform to the requirements

specified in 3.2.5. Upon completion of the vibration test, the grommets shall

be subjected to and pass the dielectric strength test (see 4.2.9).

(SEE 6.3.1)

GROMMET ASSEMBLY

VOLTS

COPPER TUBE

(RMS)

PER

ROD

GROMMET

TABLE V

HOLE FOR MS21266

2" HOLE FOR MIL-DTL-22529/1A

ALUMINUM SHEET

AND MIL-DTL-22529/2

NOTE: METAL THICKNESS SHALL

CORRESPOND TO APPLICABLE

DASH NUMBER ON MS21266, MIL-DTL-22529/1A AND MIL-DTL-22529/2

FIGURE 1.

Dielectric strength test fixture.

4.2.9 Dielectric withstanding voltage test (dielectric strength). The

grommet shall be installed in the dielectric strength test fixture as

indicated in Figure 1 and tested in accordance with MIL-STD-202, Method 301.