| CROSS-SECTIONAL SHAPE STYLE | U |
| CROSS-SECTIONAL HEIGHT | 0.265 INCHES MINIMUM AND 0.285 INCHES MAXIMUM |
| CENTER HOLE DIAMETER | 3.490 INCHES MINIMUM AND 3.510 INCHES MAXIMUM |
| PERIPHERAL DIAMETER | 4.125 INCHES NOMINAL |
| HARDNESS RATING | 85.0 SHORE DUROMETER A MINIMUM AND 95.0 SHORE DUROMETER A MAXIMUM OVERALL |
| COLOR | BLACK |
| MATERIAL | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | 417,GRSB910BE3 MIL STD SINGLE MATERIAL RESPONSE OVERALL |