The Gage,differential,dial Indicatin, cataloged under National Stock Number 6685-01-677-7399, 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 Ashcroft Inc Dba Heise. Government technical data includes 24 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-677-7399 |
| Primary Part Number | 451128SD04L15/15# |
| Item Name | Gage,differential,dial Indicatin |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Mounting Hole Quantity | 3 |
| Scale Accuracy | 2 PERCENT-1 PERCENT- 2 PERCENT |
| Scale Name | DIFFERENTIAL PRESSURE |
| Actuation Type | BOURDON TUBE |
| Mounting Method | SURFACE |
| Scale Inscription/background Color | WHITE PAINTED ALUMINUM WITH BLACK MARKINGS |
| Connection Type | EXTERNAL |
| Scale Range | -15.0 TO 15.0 POUNDS PER SQUARE INCH LBS |
| Material Document and Classification | AISI 316 ASSN STD SINGLE MATERIAL RESPONSE ACTUATING ELEMENT |
| Mounting Hole Diameter | 0.21875 INCHES NOMINAL IN |
| Scale Name for Which Pointer Is Designed | DIFFERENTIAL PRESSURE |
| Pointer Type | INDICATING |
| Scale Type | DIAL |
| Dial Size | 4.5 INCHES IN |
| Graduation Unit | 0.5 POUNDS PER SQUARE INCH LBS |
| Bolt Circle Diameter | 5.375 INCHES NOMINAL IN |
| Connection Location | BOTTOM |
| Pointer Color | BLACK |
| Surface Treatment | PAINT CASE |
| Material | GLASS PROTECTIVE CRYSTAL |
| Material | ALUMINUM CASE |
| Material | STEEL COMP 316 ACTUATING ELEMENT |
| Connection Quantity | 2 |
| Connection Size | 1/2 NPT |
| 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 |
|---|---|
| 451128SD04L15/15# PRIMARY | Ashcroft Inc Dba Heise (USA) |
NSN 6685-01-677-7399 is a Gage,differential,dial Indicatin, manufactured by Ashcroft Inc Dba Heise, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-677-7399 has 1 manufacturer part number on file: 451128SD04L15/15# (Ashcroft Inc Dba Heise).
Key specifications for 451128SD04L15/15#: Mounting Hole Quantity: 3; Overall Height: 7.0 INCHES NOMINAL IN; Scale Accuracy: 2 PERCENT-1 PERCENT- 2 PERCENT; Scale Name: DIFFERENTIAL PRESSURE. 24 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.