PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2 1-2 3DP1-8BM30X300RBGage,compound Pressure-Vacuum,di

Desco Corp Marsh Bellofram Div · NSN 6685-00-087-6293 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-087-6293 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-087-6293. Primary manufacturer part number: 2 1-2 3DP1-8BM30X300RB.
Features
  • Gage,compound Pressure-Vacuum,di — FSC 6685
  • Scale Name for Which Pointer Is Designed: PRESSURE-VACUUM
  • Scale Accuracy: 2 PCT ENTIRE RANGE BOTH SCALES
  • Connection Quantity: 1
  • Graduation Unit: 30.0 INCHES AND 30.0 POUNDS PER SQUARE INCH LBS
  • Pointer Color: BLACK
  • Scale Smallest Increment: 10.0 INCHES AND 5.0 POUNDS PER SQUARE INCH (PSI) LBS
  • Adjustability: ADJUSTABLE
Applications
  • Applications requiring Glass Protective Crystal construction
General Description

The Gage,compound Pressure-Vacuum,di, cataloged under National Stock Number 6685-00-087-6293, 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 24 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, 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
NSN6685-00-087-6293
Primary Part Number2 1-2 3DP1-8BM30X300RB
Item NameGage,compound Pressure-Vacuum,di
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerDesco Corp Marsh Bellofram Div
StatusACTIVE
Scale Name for Which Pointer Is DesignedPRESSURE-VACUUM
Scale Accuracy2 PCT ENTIRE RANGE BOTH SCALES
Connection Quantity1
Graduation Unit30.0 INCHES AND 30.0 POUNDS PER SQUARE INCH LBS
Pointer ColorBLACK
Scale Smallest Increment10.0 INCHES AND 5.0 POUNDS PER SQUARE INCH (PSI) LBS
AdjustabilityADJUSTABLE
Scale TypeMULTIPLE
Actuation TypeSINGLE BOURDON TUBE
MaterialGLASS PROTECTIVE CRYSTAL
MaterialCOPPER ALLOY ACTUATING ELEMENT
Scale Range+0.0 TO 30.0 INCHES OF MERCURY AND +0.0 TO 300.0 POUNDS PRESSURE PER SQUARE INCH LBS
Pointer TypeINDICATING
Dial Size2-1/2 IN. DIA IN
Scale NamePRESSURE AND PRESSURE-VACUUM
Bezel TypeSLIPS-ON
Connection Size0.125 IN. NPT DIA IN
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND BOTH SCALES
Connector Type VentNOT PROVIDED
MaterialSTEEL CASE
Surface TreatmentPAINT
Overall Diameter2.719 INCHES NOMINAL IN
Connection LocationLOWER
Mounting MethodRIGID STEM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
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
6685-00-984-13023DP INTERCHANGEABLE
Gage,compound Pressure-Vacuum-Te
Bellofram Corporation
Cross-Reference Index
Part NumberManufacturer
2 1-2 3DP1-8BM30X300RB Desco Corp Marsh Bellofram Div (USA)
3DP Desco Corp Marsh Bellofram Div (USA)
023446 Desco Corp Marsh Bellofram Div (USA)
Related Parts
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
6685-00-984-1302INTERCHANGEABLE
GAGE,COMPOUND PRESSURE-VACUUM-TE
3DP

Frequently Asked Questions

What is NSN 6685-00-087-6293?

NSN 6685-00-087-6293 is a Gage,compound Pressure-Vacuum,di, manufactured by Desco Corp Marsh Bellofram Div, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-087-6293?

NSN 6685-00-087-6293 has 3 cross-referenced part numbers: 2 1-2 3DP1-8BM30X300RB (Desco Corp Marsh Bellofram Div), 3DP (Desco Corp Marsh Bellofram Div), 023446 (Desco Corp Marsh Bellofram Div).

What NSN replaces 6685-00-087-6293?

There are 8 known substitutes for 6685-00-087-6293: 6685-00-202-3966, 6685-00-248-6887, 6685-00-413-6670 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2 1-2 3DP1-8BM30X300RB?

Key specifications for 2 1-2 3DP1-8BM30X300RB: Scale Name for Which Pointer Is Designed: PRESSURE-VACUUM; Scale Accuracy: 2 PCT ENTIRE RANGE BOTH SCALES; Connection Quantity: 1; Graduation Unit: 30.0 INCHES AND 30.0 POUNDS PER SQUARE INCH LBS. 25 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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