M20 x 1.5 external mounting thread; 5/8 x 28UN-2B internal cartridge thread; 50% RH; EPDM.
Description
AD324 is an aluminium alloy humidity indicator plug with a 50% RH disc. Its internal 5/8 x 28UN-2B thread is provided for fitting a desiccator cartridge.
The supplied sheet specifies an EPDM O-ring, a black anodised finish and DEF STAN 66-14 Style 1HP1. The NATO stock number depends on the packaging configuration.
Technical specifications
| Specification | Value |
|---|---|
| Internal cartridge thread | 5/8 x 28UN-2B |
| Material | Aluminium alloy |
| Finish | Anodised black to DEF STAN 03-25 |
| O-ring | EPDM, size 115 (BS1806) |
| Indicator disc | 50% RH at 25 °C |
| Standard | DEF STAN 66-14, Style 1HP1 |
| Packaging | Packaged for a 5-year shelf life |
| AD324/P1 | Individually packed; NSN 6685990142500 |
| AD324/P5 | Pack of five; NSN 6685996871695 |
| General tolerances | ±1/16 inch |
| Compliance | REACH and RoHS |
The external mounting thread is M20 x 1.5. The separate internal 5/8 x 28UN-2B thread accepts a desiccator cartridge.
Further information
| O-ring | EPDM – Size 115 (BS1806) |
|---|---|
| Material | Aluminium Alloy |
| Finish | Anodised Black to DEF STAN 03-25 |
| Indicator Disc | 50% RH |
| NATO Stock Number | 6685990142500, 6685996871695 |
| Associated Part Numbers to NSN | 0STS375ITEM38, 1HP1, 23855-00513, 5017006F, B20548, BLD1080, BLD1080P5, DEF STAN 66-14-IHP1, IHP1M, J403-010 |
| Internal Thread | 5/8 x 28UN-2B |
| Mounting Thread | M20 x 1.5 |
Drawings available on request.
Request drawings
