7690-1: 7690-1.
- Colour-neutral filter for the targeted reduction of light - Exposure correction: 8x = 3 aperture values; 64 = 6 aperture values; 1000 = 10 aperture values - NMC16 coating: eight layers on each side, for maximum anti-reflective properties - Vapour-deposited nano-coating - Developed especially for digital cameras thanks to double-sided coating - With front thread for other filters, lens cap or lens hood - Quality class (glass): high-quality lens glass - 1 filter bag - 1 ND8 grey filter - 1 ND64 grey filter - 1 ND1000 grey filter This part is cataloged in the U.S. Government catalog under NSN 6625-00-604-2638, indicating validated use in U.S. government and defense logistics supply chains.
| material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| overall_height | 0.312 INCHES NOMINAL IN |
| inside_diameter | 0.750 INCHES NOMINAL IN |
| pressure_rating | 250.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| outside_diameter | 2.500 INCHES NOMINAL IN |
| special_features | FOR PRESSURE REGULATING VALVE SZ 2.000 IN. IN |
| style_designator | PLAIN |
| media_for_which_designed | WATER, SALT |
| NSN | 6625-00-604-2638 |
| MOUNTING FACILITY TYPE AND QUANTITY | 3 UNTHREADED HOLE(S) |
| METER BODY DIAMETER BEHIND MOUNTING FLANGE | 2.750 INCHES NOMINAL IN |
| FSC APPLICATION DATA | TEST SET,ELECTRONIC EQUIPMENT |
| INDICATOR TYPE | DIAL W/POINTER |
| MOUNTING ARRANGEMENT STYLE | THREE HOLE/STUD BOLT CIRCLE |
| CIRCUIT ATTACHMENT METHOD AND QUANTITY | 2 SOLDER STUD |
| METER DEPTH BEHIND MOUNTING FLANGE | 1.515 INCHES NOMINAL IN |
| CIRCUIT CURRENT FOR WHICH DESIGNED | AC |
| MOVEMENT TYPE | MOVING IRON VANE |
| ACCURACY IN PERCENT | -2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE |