The Transmitter,pressure, cataloged under National Stock Number 6685-00-804-0299, 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 Ametek, Inc. Div Aerospace & Defense. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-00-804-0299 |
| Primary Part Number | ST-27A |
| Item Name | Transmitter,pressure |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Ametek, Inc. Div Aerospace & Defense |
| Status | ACTIVE |
| Actuation Method | DIAPHRAGM |
| FSC Application Data | TRANSMITTER,PRESSURE,EXCEPT ENGINE |
| Phase | THREE LOCATION NOT OTHERWISE SPECIFIED |
| Contact Type | PIN |
| Current Type | AC |
| Mechanical Connection Quantity | 2 |
| Electrical Connection Quantity | 1 |
| Electrical Connection Identifying Number | TYPE NO. MS33678-14S5P |
| Mounting Method | HOLE |
| Overall Thickness | 2.625 INCHES NOMINAL IN |
| Mechanical Connection Type | EXTERNAL TUBE |
| Mechanical Connection Size | 1,AS PER AND 10050-4; 1,AS PER MS 33656-2 |
| Contact Quantity | 5 |
| Mounting Device Quantity | 4 |
| Connector Controlling Agency | MS |
| Frequency Rating | 400.0 HERTZ NOMINAL LOCATION NOT OTHERWISE SPECIFIED |
| Voltage Rating | 26.0 VOLTS NOMINAL LOCATION NOT OTHERWISE SPECIFIED |
| Measurement Range | +0.0 TO 2500.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| ST-27A PRIMARY | Ametek, Inc. Div Aerospace & Defense (USA) |
| Reference | Meaning |
|---|---|
| 10-60172 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 6685-00-804-0299 is a Transmitter,pressure, manufactured by Ametek, Inc. Div Aerospace & Defense, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-804-0299 has 1 manufacturer part number on file: ST-27A (Ametek, Inc. Div Aerospace & Defense).
1 possible match (shared part number, not a government interchangeability claim): 6150-01-207-1769. Verify interchangeability with system specifications before substitution.
Key specifications for ST-27A: Actuation Method: DIAPHRAGM; FSC Application Data: TRANSMITTER,PRESSURE,EXCEPT ENGINE; Phase: THREE LOCATION NOT OTHERWISE SPECIFIED; Contact Type: PIN. 18 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.