The Gage,compound Pressure-Vacuum,di, cataloged under National Stock Number 6685-00-228-3781, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Ametek, Inc. Div Aerospace & Defense. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-00-228-3781 |
| Primary Part Number | 644U |
| Item Name | Gage,compound Pressure-Vacuum,di |
| FSC / FSG | 6685 / 66 — No Item Name Available |
| Manufacturer | Ametek, Inc. Div Aerospace & Defense |
| Status | ACTIVE |
| Scale Smallest Increment | 1.0 INCHES AND 1.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Connection Location | BACK, CENTER |
| Scale Inscription/background Color | BLACK FIGURES ON WHITE BACKGROUND |
| Material | STEEL CASE |
| Scale Range | +0.0 TO 30.0 INCHES OF MERCURY AND +0.0 TO 15.0 POUNDS PRESSURE PER SQUARE INCH LBS |
| Material | GLASS PROTECTIVE CRYSTAL |
| Pointer Type | INDICATING |
| Stud Location | BACK |
| Material | COPPER ALLOY 511 ACTUATING ELEMENT |
| Connector Type Vent | NOT PROVIDED |
| Scale Name for Which Pointer Is Designed | PRESSURE-VACUUM |
| Connection Quantity | 1 |
| Scale Type | MULTIPLE |
| Actuation Type | SINGLE BOURDON TUBE |
| Bezel Type | SNAP-ON |
| Mounting Method | FLUSH PANEL AND STUD(S) AND BRACKET(S) |
| Stud Quantity | 2 |
| Pointer Color | BLACK |
| Connection Size | 0.156 IN. DIA HOSE IN |
| Connection Type | EXTERNAL |
| Scale Accuracy | 2 PCT MIDDLE HALF OF RANGE |
| Graduation Unit | 5.0 INCHES AND 3.0 POUNDS PER SQUARE INCH LBS |
| Adjustability | NONADJUSTABLE |
| Dial Size | 2 IN. DIA IN |
| Scale Name | PRESSURE-VACUUM |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED IN ACTUATING ELEMENT DATA,MULTIPLE READING SCALE,DIAL DATA,CASE DATA,GLASS PROTECTIVE CRYSTAL,AND CONNECTION DATA |
| Surface Treatment | ENAMEL CASE |
| Overall Diameter | 2.250 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 6685-00-228-3781 is a Gage,compound Pressure-Vacuum,di, manufactured by Ametek, Inc. Div Aerospace & Defense, classified under FSC 6685 (No Item Name Available). Status: active.
NSN 6685-00-228-3781 has 4 cross-referenced part numbers: 644U (Ametek, Inc. Div Aerospace & Defense), 844U (Ametek, Inc. Div Process & Analytical Instruments Division), 1-119987 (Simpson Electric Company, Inc.), C844U (Ametek, Inc. Div Aerospace & Defense).
There are 4 known substitutes for 6685-00-228-3781: 6685-00-618-3519, 6685-01-096-1711, 6685-01-096-1712 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for 644U: Scale Smallest Increment: 1.0 INCHES AND 1.0 POUNDS PER SQUARE INCH (PSI) LBS; Connection Location: BACK, CENTER; Scale Inscription/background Color: BLACK FIGURES ON WHITE BACKGROUND; Material: STEEL CASE. 29 total characteristics are documented in the Federal Logistics Information System.