2112512 （DANA/PERFECT CIRCLE） Interchangeable with MW-1654 EX* (Valves）
Specifications Fractional to Decimal Chart
| Detail | Data |
| Chrome or Nitrated | N |
| Head Diameter | 1.4440 |
| Length | 5.9970 |
| Seat Angle | 30 |
| Stem Diameter | 0.3708 |
| Stem Type | 1G |
| Tip Length | 0.4010 |
| Wafer | N |
| Note | Stellite Face |
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Interchanges
| Name | Part Number |
| AE CLEVITE | I1523S |
| ALLIS CHALMERS | 4007148 |
| ALLIS CHALMERS | 4023379 |
| DANA/PERFECT CIRCLE | 2112512 |
| DYNAGEAR/MANLEY | AX2095 |
| FEDERAL MOGUL/SEALED POWER | V2213X |
| SBI # | 01523S |
| TRW | AS3097 |
| Fractions | Decimal |
| 1/64 | 0.0156 |
| 1/32 | 0.0313 |
| 3/64 | 0.0469 |
| 1/16 | 0.0625 |
| 5/64 | 0.0781 |
| 3/32 | 0.0938 |
| 7/64 | 0.1094 |
| 1/8 | 0.1250 |
| 9/64 | 0.1406 |
| 5/32 | 0.1563 |
| 11/64 | 0.1719 |
| 3/16 | 0.1875 |
| 13/64 | 0.2031 |
| 7/32 | 0.2188 |
| 15/64 | 0.2344 |
| 1/4 | 0.2500 |
| 17/64 | 0.2656 |
| 9/32 | 0.2813 |
| 19/64 | 0.2969 |
| 5/16 | 0.3125 |
| 21/64 | 0.3281 |
| 11/32 | 0.3438 |
| 23/64 | 0.3594 |
| 3/8 | 0.3750 |
| 25/64 | 0.3906 |
| 13/32 | 0.4063 |
| 27/64 | 0.4219 |
| 7/16 | 0.4375 |
| 29/64 | 0.4531 |
| 15/32 | 0.4688 |
| 31/64 | 0.4844 |
| 1/2 | 0.5000 |
| 33/64 | 0.5156 |
| 17/32 | 0.5313 |
| 35/64 | 0.5469 |
| 9/16 | 0.5625 |
| 37/64 | 0.5781 |
| 19/32 | 0.5938 |
| 39/64 | 0.6094 |
| 5/8 | 0.6250 |
| 41/64 | 0.6406 |
| 21/32 | 0.6563 |
| 43/64 | 0.6719 |
| 11/16 | 0.6875 |
| 45/64 | 0.7031 |
| 23/32 | 0.7188 |
| 47/64 | 0.7344 |
| 3/4 | 0.7500 |
| 49/64 | 0.7656 |
| 25/32 | 0.7813 |
| 51/64 | 0.7969 |
| 13/16 | 0.8125 |
| 53/64 | 0.8281 |
| 27/32 | 0.8438 |
| 55/64 | 0.8594 |
| 7/8 | 0.8750 |
| 57/64 | 0.8906 |
| 29/32 | 0.9063 |
| 59/64 | 0.9219 |
| 15/16 | 0.9375 |
| 61/64 | 0.9531 |
| 31/32 | 0.9688 |
| 63/64 | 0.9844 |
| 1.0 | 1.0000 |
