PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

P18040Gage,pressure,dial Indicating

Bellofram Corporation · NSN 6685-00-684-1494 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-684-1494 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-684-1494. Primary manufacturer part number: P18040.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • Mounting Hole Diameter: 0.281 INCHES NOMINAL IN
  • Material: ALUMINUM CASE
  • Color: BLACK CASE
  • Surface Treatment: ENAMEL CASE
  • Overall Diameter: 6.312 INCHES NOMINAL IN
  • Material: STEEL CORROSION RESISTING ACTUATING ELEMENT
  • Material: GLASS PROTECTIVE CRYSTAL
Applications
  • Applications requiring Aluminum Case construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-684-1494, 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 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6685-00-684-1494
Primary Part NumberP18040
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerBellofram Corporation
StatusCANCELLED
Mounting Hole Diameter0.281 INCHES NOMINAL IN
MaterialALUMINUM CASE
ColorBLACK CASE
Surface TreatmentENAMEL CASE
Overall Diameter6.312 INCHES NOMINAL IN
MaterialSTEEL CORROSION RESISTING ACTUATING ELEMENT
MaterialGLASS PROTECTIVE CRYSTAL
Connection TypeEXTERNAL
Scale NamePRESSURE
Connector Type VentNOT PROVIDED
Graduation Unit1.0 POUNDS PER SQUARE INCH LBS
Dial Size4-1/2 IN. DIA IN
Actuation TypeSINGLE BOURDON TUBE
Bezel TypeTHREAD
Connection LocationBACK, LOWER
Scale TypeSINGLE
Pointer TypeINDICATING
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND
Scale Range+0.0 TO 15.0 POUNDS PRESSURE PER SQUARE INCH LBS
Scale Smallest Increment0.125 POUNDS PER SQUARE INCH (PSI) LBS
Scale AccuracyPORM 1/2 PCT FULL RANGE
Connection Size0.250 IN. NPT DIA IN
Mounting MethodFLUSH PANEL
AdjustabilityADJUSTABLE
Pointer ColorBLACK
Connection Quantity1
Bolt Circle Diameter5.500 INCHES NOMINAL IN
Mounting Hole Quantity3
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
6685-00-068-344645-1377BS02B600 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ashcroft Inc Dba Heise
6685-00-123-2552 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-435-9267AA446PH4RW INTERCHANGEABLE
Gage,pressure,dial Indicating
Weksler Glass Thermometer Corp
6685-00-542-086645-1377SS02B600 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ashcroft Inc Dba Heise
6685-00-801-5766 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-822-692345-1377RS-02B-200 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ashcroft Inc Dba Heise
Cross-Reference Index
Part NumberManufacturer
P18040 PRIMARY Bellofram Corporation (USA)
75B33-65 Liftec Inc Div Liftec, Inc. (USA)
P18040 American Coleman Company, the Dba Metro Crown International (USA)
G18313 Liftec Inc Div Liftec, Inc. (USA)
75B65-33 Liftec Inc Div Liftec, Inc. (USA)
P18040 Desco Corp Marsh Bellofram Div (USA)
6799094-840 General Motors Corp (USA)
6799094-840 PRIMARY Allison Transmission Inc Dba Allison Transmission, Inc (USA)
75B65 Liftec Inc Div Liftec, Inc. (USA)
176F33F Liftec Inc Div Liftec, Inc. (USA)
Related Parts
6685-00-068-3446INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
45-1377BS02B600
6685-00-123-2552INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-435-9267INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
AA446PH4RW
6685-00-542-0866INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
45-1377SS02B600
6685-00-801-5766INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-822-6923INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
45-1377RS-02B-200

Frequently Asked Questions

What is NSN 6685-00-684-1494?

NSN 6685-00-684-1494 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 6685-00-684-1494?

NSN 6685-00-684-1494 has 10 cross-referenced part numbers: P18040 (Bellofram Corporation), 75B33-65 (Liftec Inc Div Liftec, Inc.), P18040 (American Coleman Company, the Dba Metro Crown International), G18313 (Liftec Inc Div Liftec, Inc.), 75B65-33 (Liftec Inc Div Liftec, Inc.) and 5 more.

What NSN replaces 6685-00-684-1494?

There are 6 known substitutes for 6685-00-684-1494: 6685-00-068-3446, 6685-00-123-2552, 6685-00-435-9267 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of P18040?

Key specifications for P18040: Mounting Hole Diameter: 0.281 INCHES NOMINAL IN; Material: ALUMINUM CASE; Color: BLACK CASE; Surface Treatment: ENAMEL CASE. 29 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-684-1494 still in active supply?

NSN 6685-00-684-1494 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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