PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

200DGage,differential,dial Indicatin

Dwyer Instruments Inc · NSN 6685-01-556-2144 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-556-2144 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-556-2144. Primary manufacturer part number: 200D.
Features
  • Gage,differential,dial Indicatin — FSC 6685
  • Scale Inscription/background Color: BLACK FIGURES ON WHITE BACKGROUND
  • Adjustability: ADJUSTABLE
  • Scale Range: +0.0 TO 2.0 INCHES OF WATER IN
  • Scale Name: DIFFERENTIAL PRESSURE
  • Pointer Color: BLACK
  • Dial Size: 4.0 INCH DIAMETER IN
  • Scale Accuracy: 2% ACCURACY FULL RANGE
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Gage,differential,dial Indicatin, cataloged under National Stock Number 6685-01-556-2144, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Dwyer Instruments Inc. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-01-556-2144
Primary Part Number200D
Item NameGage,differential,dial Indicatin
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerDwyer Instruments Inc
StatusACTIVE
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND
AdjustabilityADJUSTABLE
Scale Range+0.0 TO 2.0 INCHES OF WATER IN
Scale NameDIFFERENTIAL PRESSURE
Pointer ColorBLACK
Dial Size4.0 INCH DIAMETER IN
Scale Accuracy2% ACCURACY FULL RANGE
Scale TypeDIAL
Pointer TypeINDICATING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
6685-00-226-8150THERMOMELT 200F INTERCHANGEABLE
Temperature Indicating Compound
Markal Co
6625-00-246-8729200D INTERCHANGEABLE
Generator,signal
Keysight Technologies Inc
7450-00-984-0645 INTERCHANGEABLE
Recorder-Reproducer,sound
4730-01-505-6777200D INTERCHANGEABLE
Coupling Half,quick Disconnect
Banjo Corp
Cross-Reference Index
Part NumberManufacturer
200D PRIMARY Dwyer Instruments Inc (USA)
2002D Meggitt Defense Systems Caswell Inc. (USA)
Related Parts
6685-00-226-8150INTERCHANGEABLE
TEMPERATURE INDICATING COMPOUND
THERMOMELT 200F
6625-00-246-8729INTERCHANGEABLE
GENERATOR,SIGNAL
200D
7450-00-984-0645INTERCHANGEABLE
RECORDER-REPRODUCER,SOUND
4730-01-505-6777INTERCHANGEABLE
COUPLING HALF,QUICK DISCONNECT
200D

Frequently Asked Questions

What is NSN 6685-01-556-2144?

NSN 6685-01-556-2144 is a Gage,differential,dial Indicatin, manufactured by Dwyer Instruments Inc, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-01-556-2144?

NSN 6685-01-556-2144 has 2 cross-referenced part numbers: 200D (Dwyer Instruments Inc), 2002D (Meggitt Defense Systems Caswell Inc.).

What NSN replaces 6685-01-556-2144?

There are 4 known substitutes for 6685-01-556-2144: 6685-00-226-8150, 6625-00-246-8729, 7450-00-984-0645 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 200D?

Key specifications for 200D: Scale Inscription/background Color: BLACK FIGURES ON WHITE BACKGROUND; Adjustability: ADJUSTABLE; Scale Range: +0.0 TO 2.0 INCHES OF WATER IN; Scale Name: DIFFERENTIAL PRESSURE. 11 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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