PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2 1-2 1DEM1-4 100Gage,pressure,dial Indicating

Bellofram Corporation · NSN 6685-00-553-4728 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-553-4728 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-553-4728. Primary manufacturer part number: 2 1-2 1DEM1-4 100.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • Color: BLACK CASE
  • Material: COPPER ALLOY ACTUATING ELEMENT
  • Material: GLASS PROTECTIVE CRYSTAL
  • Scale Range: +0.000 TO 100.000 POUNDS PRESSURE PER SQUARE INCH LBS
  • Connection Size: 0.250 IN. NPT IN
  • Scale Smallest Increment: 2.000 POUNDS PER SQUARE INCH (PSI) LBS
  • Connector Type Vent: NOT PROVIDED
Applications
  • Applications requiring Copper Alloy Actuating Element construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-553-4728, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Bellofram Corporation. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6685-00-553-4728
Primary Part Number2 1-2 1DEM1-4 100
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerBellofram Corporation
StatusCANCELLED
ColorBLACK CASE
MaterialCOPPER ALLOY ACTUATING ELEMENT
MaterialGLASS PROTECTIVE CRYSTAL
Scale Range+0.000 TO 100.000 POUNDS PRESSURE PER SQUARE INCH LBS
Connection Size0.250 IN. NPT IN
Scale Smallest Increment2.000 POUNDS PER SQUARE INCH (PSI) LBS
Connector Type VentNOT PROVIDED
Scale Accuracy2 PCT ENTIRE RANGE
Actuation TypeSINGLE BOURDON TUBE
Bezel TypeSLIPS-ON
Graduation Unit10.000 POUNDS PER SQUARE INCH LBS
Scale NamePRESSURE
Stud Quantity2
Dial Size2-1/2 IN. DIA IN
Pointer ColorBLACK
Connection TypeEXTERNAL
Connection Quantity1
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND
Mounting MethodFLUSH PANEL AND STUD(S) AND BRACKET(S)
AdjustabilityNONADJUSTABLE
Connection LocationBACK
Pointer TypeINDICATING
Stud LocationBACK
Scale TypeSINGLE
Overall Diameter2.781 INCHES NOMINAL IN
MaterialSTEEL CASE
Surface TreatmentENAMEL CASE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5315-00-221-046314415 INTERCHANGEABLE
Pin,grooved,headless
Bosch Security Systems, Llc
5315-00-292-9636NAS561P6-11 INTERCHANGEABLE
Pin,spring
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
6685-00-526-01302 1-2 1DFM1-8CBM100RB INTERCHANGEABLE
Gage,pressure,dial Indicating
Bellofram Corporation
6685-00-580-349425-1009A-02B-XUCPDAN INTERCHANGEABLE
Gage,pressure,dial Indicating
Ashcroft Inc Dba Heise
6685-00-585-58731-ABC-24300-AFG-001 INTERCHANGEABLE
Gage,pressure,dial Indicating
Bellofram Corporation
6685-00-585-9346 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-866-0571 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-866-1524XD1-572 INTERCHANGEABLE
Gage,pressure,dial Indicating
Bellofram Corporation
6685-00-876-8147 INTERCHANGEABLE
Gage,pressure,dial Indicating
5445-00-944-6601TYPE1 INTERCHANGEABLE
Tower
Thomas Engineering and Surveying Co
Cross-Reference Index
Part NumberManufacturer
GAG205 Worthington Compressors Inc Air Power and Construction Equip Div (USA)
2 1-2 1DEM1-4 100 PRIMARY Bellofram Corporation (USA)
GAG220 Worthington Compressors Inc Air Power and Construction Equip Div (USA)
1DFM Desco Corp Marsh Bellofram Div (USA)
TYPE1 Desco Corp Marsh Bellofram Div (USA)
2 1-2 1DFM1-4CBM100 Desco Corp Marsh Bellofram Div (USA)
82005 Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit (USA)
1ABC03520AFA Desco Corp Marsh Bellofram Div (USA)
2 1-2 1DEM1-4 100 Desco Corp Marsh Bellofram Div (USA)
0L216-2 Desco Corp Marsh Bellofram Div (USA)
Related Parts
5315-00-221-0463INTERCHANGEABLE
PIN,GROOVED,HEADLESS
14415
5315-00-292-9636INTERCHANGEABLE
PIN,SPRING
NAS561P6-11
6685-00-526-0130INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
2 1-2 1DFM1-8CBM100RB
6685-00-580-3494INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
25-1009A-02B-XUCPDAN
6685-00-585-5873INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
1-ABC-24300-AFG-001
6685-00-585-9346INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-866-0571INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-866-1524INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
XD1-572
6685-00-876-8147INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
5445-00-944-6601INTERCHANGEABLE
TOWER
TYPE1
6685-00-964-7774INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
2 1-2 1DFM1-4 300
6145-00-974-6343INTERCHANGEABLE
WIRE,ELECTRICAL

Frequently Asked Questions

What is NSN 6685-00-553-4728?

NSN 6685-00-553-4728 is a Gage,pressure,dial Indicating, manufactured by Bellofram Corporation, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-00-553-4728?

NSN 6685-00-553-4728 has 10 cross-referenced part numbers: GAG205 (Worthington Compressors Inc Air Power and Construction Equip Div), 2 1-2 1DEM1-4 100 (Bellofram Corporation), GAG220 (Worthington Compressors Inc Air Power and Construction Equip Div), 1DFM (Desco Corp Marsh Bellofram Div), TYPE1 (Desco Corp Marsh Bellofram Div) and 5 more.

What NSN replaces 6685-00-553-4728?

There are 12 known substitutes for 6685-00-553-4728: 5315-00-221-0463, 5315-00-292-9636, 6685-00-526-0130 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2 1-2 1DEM1-4 100?

Key specifications for 2 1-2 1DEM1-4 100: Color: BLACK CASE; Material: COPPER ALLOY ACTUATING ELEMENT; Material: GLASS PROTECTIVE CRYSTAL; Scale Range: +0.000 TO 100.000 POUNDS PRESSURE PER SQUARE INCH LBS. 28 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-553-4728 still in active supply?

NSN 6685-00-553-4728 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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