SRC
| Marking | Surface | Lubricant | Friction factor: requirements flat | Friction factor: requirements heel |
|---|---|---|---|---|
| SRA | Ceramic plates | Sodium lauryl sulfate | ≥ 0.32 | ≥ 0.28 |
| SRB | Steel | Glycerol | ≥ 0.18 | ≥ 0.13 |
| SRC | Meets requirements for the 2 above tests (SRA + SRB) = SRC | |||