Non-fill is a random and irregular surface indentation with a coarser texture than the unaffected portions of the O-ring surface (see Figure 67). Non-fill results from imperfect flow of the seal material within the mold, and/or incomplete filling of the mold, and/or air trapped in the mold. (For maximum acceptable non-fill, see Table 31.)

“Non-fill is a random and irregular surface indentation.”

Figure 67

Table 31