The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-440-7138, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-440-7138 |
| Primary Part Number | EA24-3PSF-RWBO |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| EA24-3PSF-RWBO | Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc (USA) |
| Reference | Meaning |
|---|---|
| SA24-3PSF-RWBO(SE) | 5/9 Secondary reference Weksler Glass Thermometer Corp |
| SG4MC2KPWCANA | 5/9 Secondary reference U.S. Government activity |
| MIL-G-18997 | 5/9 Secondary reference U.S. Government activity |
| 255-6603213FNA41-111 | D/9 Drawing number reference only Naval Sea Systems Command |
| G27-80 | 3/9 Design control — primary reference Weksler Glass Thermometer Corp |
NSN 6685-01-440-7138 is a Gage,pressure,dial Indicating, manufactured by Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-440-7138 has 1 manufacturer part number on file: EA24-3PSF-RWBO (Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc).
Key specifications for EA24-3PSF-RWBO: Special Features: MATERIAL WILL BE IN ACCORDANCE WITH NAVAL INVENTORY CONTROL POINT, MECHANICSBURG, ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS. 0 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.