PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3DPGage,compound Pressure-Vacuum-Te

Bellofram Corporation · NSN 6685-00-984-1302 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-984-1302 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-984-1302. Primary manufacturer part number: 3DP.
Features
  • Gage,compound Pressure-Vacuum-Te — FSC 6685
  • Connection Type: EXTERNAL
  • Connection Quantity: 1
  • Pointer Type: INDICATING
  • Scale Inscription/background Color: BLACK FIGURES ON WHITE BACKGROUND; RED FIGURES ON WHITE BACKGROUND
  • Unable to Decode: UNABLE TO DECODE
  • Pointer Color: BLACK
  • Surface Treatment: ENAMEL
Applications
  • Applications requiring Steel Case construction
General Description

The Gage,compound Pressure-Vacuum-Te, cataloged under National Stock Number 6685-00-984-1302, 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 26 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-984-1302
Primary Part Number3DP
Item NameGage,compound Pressure-Vacuum-Te
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerBellofram Corporation
StatusACTIVE
Connection TypeEXTERNAL
Connection Quantity1
Pointer TypeINDICATING
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND; RED FIGURES ON WHITE BACKGROUND
Unable to DecodeUNABLE TO DECODE
Pointer ColorBLACK
Surface TreatmentENAMEL
Bezel TypeSLIPS-ON
Scale Accuracy2 PCT ENTIRE RANGE; 2 PCT ENTIRE RANGE
MaterialSTEEL CASE
Dial Size2-1/2 IN. DIA IN
Connection LocationLOWER
Connector Type VentNOT PROVIDED
MaterialCOPPER ACTUATING ELEMENT
MaterialGLASS PROTECTIVE CRYSTAL
AdjustabilityADJUSTABLE
Scale NamePRESSURE AND VACUUM
Scale Range+0.0 TO 30.0 INCHES OF VACUUM AND +0.0 TO 300.0 POUNDS PRESSURE PER SQUARE INCH LBS
Scale TypeMULTIPLE
Connection Size0.125 IN. NPT DIA IN
Scale Smallest Increment10.0 INCHES AND 5.0 POUNDS PER SQUARE INCH (PSI) LBS
Mounting MethodRIGID STEM
Actuation TypeSINGLE BOURDON TUBE
Scale Name for Which Pointer Is DesignedPRESSURE AND VACUUM AND TEMPERATURE
Graduation Unit30.0 INCHES AND 30.0 POUNDS PER SQUARE INCH LBS
Overall Diameter2.718 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
6685-00-087-6293 INTERCHANGEABLE
Gage,compound Pressure-Vacuum,di
6685-00-202-3966 INTERCHANGEABLE
Gage,compound Pressure-Vacuum,di
6685-00-248-6887047104 INTERCHANGEABLE
Gage,vacuum,indicating
Ametek, Inc. Div Aerospace & Defense
6685-00-413-6670023266 INTERCHANGEABLE
Gage,compound Pressure-Vacuum,di
Bellofram Corporation
6685-00-581-88677891-051REVDPC25 INTERCHANGEABLE
Gage,compound Pressure-Vacuum,di
Electric Boat Corporation Div General Dynamics Electric Boat
6685-00-753-28961AEC03160AAA INTERCHANGEABLE
Gage,compound Pressure-Vacuum,di
Bellofram Corporation
6685-00-814-5693J4120 INTERCHANGEABLE
Gage,compound Pressure-Vacuum,di
Bellofram Corporation
6685-00-899-07912 1-2 3DP1-4BM30IN30 INTERCHANGEABLE
Gage,compound Pressure-Vacuum,di
Bellofram Corporation
Cross-Reference Index
Part NumberManufacturer
3DP PRIMARY Bellofram Corporation (USA)
3DP Desco Corp Marsh Bellofram Div (USA)
Related Parts
6685-00-087-6293INTERCHANGEABLE
GAGE,COMPOUND PRESSURE-VACUUM,DI
6685-00-202-3966INTERCHANGEABLE
GAGE,COMPOUND PRESSURE-VACUUM,DI
6685-00-248-6887INTERCHANGEABLE
GAGE,VACUUM,INDICATING
047104
6685-00-413-6670INTERCHANGEABLE
GAGE,COMPOUND PRESSURE-VACUUM,DI
023266
6685-00-581-8867INTERCHANGEABLE
GAGE,COMPOUND PRESSURE-VACUUM,DI
7891-051REVDPC25
6685-00-753-2896INTERCHANGEABLE
GAGE,COMPOUND PRESSURE-VACUUM,DI
1AEC03160AAA
6685-00-814-5693INTERCHANGEABLE
GAGE,COMPOUND PRESSURE-VACUUM,DI
J4120
6685-00-899-0791INTERCHANGEABLE
GAGE,COMPOUND PRESSURE-VACUUM,DI
2 1-2 3DP1-4BM30IN30

Frequently Asked Questions

What is NSN 6685-00-984-1302?

NSN 6685-00-984-1302 is a Gage,compound Pressure-Vacuum-Te, manufactured by Bellofram Corporation, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-984-1302?

NSN 6685-00-984-1302 has 2 cross-referenced part numbers: 3DP (Bellofram Corporation), 3DP (Desco Corp Marsh Bellofram Div).

What NSN replaces 6685-00-984-1302?

There are 8 known substitutes for 6685-00-984-1302: 6685-00-087-6293, 6685-00-202-3966, 6685-00-248-6887 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3DP?

Key specifications for 3DP: Connection Type: EXTERNAL; Connection Quantity: 1; Pointer Type: INDICATING; Scale Inscription/background Color: BLACK FIGURES ON WHITE BACKGROUND; RED FIGURES ON WHITE BACKGROUND. 27 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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