The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-137-4726, 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 26 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-137-4726 |
| Primary Part Number | 164452 |
| Item Name | Gage,pressure,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Ametek, Inc. Div Aerospace & Defense |
| Status | ACTIVE |
| Mounting Hole Quantity | 3 |
| Scale Accuracy | PORM 2 PCT MIDDLE HALF; 3 PCT REMAINDER |
| Scale Name | PRESSURE |
| Overall Diameter | 3.530 INCHES NOMINAL IN |
| Actuation Type | BOURDON TUBE |
| Mounting Method | FLUSH |
| Scale Inscription/background Color | BLACK MARKINGS ON WHITE BACKGROUND |
| Scale Smallest Increment | 2.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Type | EXTERNAL |
| Scale Range | +0.0 TO 60.0 POUNDS PRESSURE PER SQUARE INCH LBS |
| Mounting Hole Diameter | 0.156 INCHES NOMINAL IN |
| Pointer Type | INDICATING |
| Adjustability | ADJUSTABLE |
| Scale Type | SINGLE |
| Connector Type Vent | NOT PROVIDED |
| Dial Size | 2-1/2 IN. DIA IN |
| Graduation Unit | 10.0 POUNDS PER SQUARE INCH LBS |
| Bolt Circle Diameter | 3.125 INCHES NOMINAL IN |
| Connection Location | BACK, CENTER |
| Pointer Color | BLACK |
| Material | PLASTIC ACRYLIC PROTECTIVE CRYSTAL |
| Material | STEEL CASE |
| Material | COPPER ALLOY 511 ACTUATING ELEMENT |
| Connection Quantity | 1 |
| Bezel Type | THREAD |
| Connection Size | 0.125 IN. NPT DIA IN |
| 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 |
|---|---|
| 2 1/2P845FF0-60 | Ametek, Inc. Div Aerospace & Defense (USA) |
| 164452 PRIMARY | Ametek, Inc. Div Aerospace & Defense (USA) |
| Reference | Meaning |
|---|---|
| 138045 | 5/9 Secondary reference Ametek, Inc. Div Aerospace & Defense |
NSN 6685-01-137-4726 is a Gage,pressure,dial Indicating, manufactured by Ametek, Inc. Div Aerospace & Defense, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-137-4726 has 2 manufacturer part numbers on file: 2 1/2P845FF0-60 (Ametek, Inc. Div Aerospace & Defense), 164452 (Ametek, Inc. Div Aerospace & Defense).
3 possible matches (shared part number, not a government interchangeability claim): 5330-01-183-4062, 3020-01-424-9048, 6750-01-427-1291. Verify interchangeability with system specifications before substitution.
Key specifications for 164452: Mounting Hole Quantity: 3; Scale Accuracy: PORM 2 PCT MIDDLE HALF; 3 PCT REMAINDER; Scale Name: PRESSURE; Overall Diameter: 3.530 INCHES NOMINAL IN. 26 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.