PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1DFMGage,pressure,dial Indicating

Desco Corp Marsh Bellofram Div · NSN 6685-00-866-0571 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-866-0571 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-866-0571. Primary manufacturer part number: 1DFM.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • Color: BLACK CASE
  • Material: STEEL CASE
  • Material: GLASS PROTECTIVE CRYSTAL
  • Material: COPPER ALLOY ACTUATING ELEMENT
  • Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY ACTUATION TYPE,ACTUATING ELEMENT MATERIAL,SCALE TYPE,SCALE NAME,SCALE RANGE,SCALE ACCURACY,GRADUATION UNIT,SCALE SMALLEST INCREMENT,SCALE INCRIPTION/BACKGROUND COLOR,DIAL SIZE,OVERALL DEPTH,CASE MATERIAL,CASE SURFACE TREATMENT,OVERALL DIAMETER,MATERIAL,SURFACE TREATMENT,CONNECTION QUANTITY,CONNECTION TYPE,CONNECTION LOCATION,CONNECTION SIZE
  • FSC Application Data: GAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE
  • Surface Treatment: PAINT CRACKLE FINISH CASE
Applications
  • Applications requiring Steel Case construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-866-0571, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Desco Corp Marsh Bellofram Div. Government technical data includes 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6685-00-866-0571
Primary Part Number1DFM
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerDesco Corp Marsh Bellofram Div
StatusCANCELLED
ColorBLACK CASE
MaterialSTEEL CASE
MaterialGLASS PROTECTIVE CRYSTAL
MaterialCOPPER ALLOY ACTUATING ELEMENT
Reference Number Differentiating CharacteristicsAS DIFFERENTIATED BY ACTUATION TYPE,ACTUATING ELEMENT MATERIAL,SCALE TYPE,SCALE NAME,SCALE RANGE,SCALE ACCURACY,GRADUATION UNIT,SCALE SMALLEST INCREMENT,SCALE INCRIPTION/BACKGROUND COLOR,DIAL SIZE,OVERALL DEPTH,CASE MATERIAL,CASE SURFACE TREATMENT,OVERALL DIAMETER,MATERIAL,SURFACE TREATMENT,CONNECTION QUANTITY,CONNECTION TYPE,CONNECTION LOCATION,CONNECTION SIZE
FSC Application DataGAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE
Surface TreatmentPAINT CRACKLE FINISH CASE
Scale Range+0.000 TO 30.000 POUNDS PRESSURE PER SQUARE INCH LBS
Pointer TypeINDICATING
Connection Quantity1
Scale TypeSINGLE
Scale Accuracy2 PCT ENTIRE RANGE
Dial Size2 IN. DIA IN
Scale Smallest Increment1.0 POUNDS LBS
Bezel TypeSNAP-ON
Pointer ColorBLACK
Scale NamePRESSURE
AdjustabilityNONADJUSTABLE
Actuation TypeSINGLE BOURDON TUBE
Mounting MethodFLUSH PANEL AND STUD(S) AND BRACKET(S)
Connection LocationBACK
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND
Connection TypeEXTERNAL
Graduation Unit5.0 POUNDS LBS
Stud Quantity2
Connection Size1/4 IN. NPT IN
Stud LocationBACK
Connector Type VentNOT PROVIDED
Overall Diameter2.312 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
6685-00-526-01302 1-2 1DFM1-8CBM100RB INTERCHANGEABLE
Gage,pressure,dial Indicating
Bellofram Corporation
6685-00-553-47282 1-2 1DEM1-4 100 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
6685-00-866-1524XD1-572 INTERCHANGEABLE
Gage,pressure,dial Indicating
Bellofram Corporation
6685-00-876-8147 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-964-77742 1-2 1DFM1-4 300 INTERCHANGEABLE
Gage,pressure,dial Indicating
Bellofram Corporation
Cross-Reference Index
Part NumberManufacturer
1DFM Desco Corp Marsh Bellofram Div (USA)
2-1DFM1-4CBM30 Desco Corp Marsh Bellofram Div (USA)
1DFM Bellofram Corporation (USA)
2-1DFM1-4CBM30 Bellofram Corporation (USA)
Related Parts
6685-00-526-0130INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
2 1-2 1DFM1-8CBM100RB
6685-00-553-4728INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
2 1-2 1DEM1-4 100
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
6685-00-866-1524INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
XD1-572
6685-00-876-8147INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-964-7774INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
2 1-2 1DFM1-4 300

Frequently Asked Questions

What is NSN 6685-00-866-0571?

NSN 6685-00-866-0571 is a Gage,pressure,dial Indicating, manufactured by Desco Corp Marsh Bellofram Div, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-00-866-0571?

NSN 6685-00-866-0571 has 4 cross-referenced part numbers: 1DFM (Desco Corp Marsh Bellofram Div), 2-1DFM1-4CBM30 (Desco Corp Marsh Bellofram Div), 1DFM (Bellofram Corporation), 2-1DFM1-4CBM30 (Bellofram Corporation).

What NSN replaces 6685-00-866-0571?

There are 8 known substitutes for 6685-00-866-0571: 6685-00-526-0130, 6685-00-553-4728, 6685-00-580-3494 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1DFM?

Key specifications for 1DFM: Color: BLACK CASE; Material: STEEL CASE; Material: GLASS PROTECTIVE CRYSTAL; Material: COPPER ALLOY ACTUATING ELEMENT. 30 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-866-0571 still in active supply?

NSN 6685-00-866-0571 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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