PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

P845FF-3 1/2-1/4B-0/600Gage,pressure,dial Indicating

Ametek, Inc. Div Aerospace & Defense · NSN 6685-00-527-7191 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-527-7191 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-527-7191. Primary manufacturer part number: P845FF-3 1/2-1/4B-0/600.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • Overall Diameter: 4.880 INCHES NOMINAL IN
  • Material: STEEL CASE
  • Material: PLASTIC PROTECTIVE CRYSTAL
  • Material: COPPER ALLOY 511 ACTUATING ELEMENT
  • Mounting Hole Quantity: 3
  • Mounting Hole Diameter: 0.188 INCHES NOMINAL IN
  • Bolt Circle Diameter: 4.438 INCHES NOMINAL IN
Applications
  • Applications requiring Steel Case construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-527-7191, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Ametek, Inc. Div Aerospace & Defense. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 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
NSN6685-00-527-7191
Primary Part NumberP845FF-3 1/2-1/4B-0/600
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerAmetek, Inc. Div Aerospace & Defense
StatusCANCELLED
Overall Diameter4.880 INCHES NOMINAL IN
MaterialSTEEL CASE
MaterialPLASTIC PROTECTIVE CRYSTAL
MaterialCOPPER ALLOY 511 ACTUATING ELEMENT
Mounting Hole Quantity3
Mounting Hole Diameter0.188 INCHES NOMINAL IN
Bolt Circle Diameter4.438 INCHES NOMINAL IN
Pointer TypeINDICATING
Graduation Unit100.0 POUNDS PER SQUARE INCH LBS
Dial Size3-1/2 IN. DIA IN
AdjustabilityNONADJUSTABLE
Mounting MethodFLUSH PANEL
Connection LocationBACK, CENTER
Scale Accuracy2 PCT MIDDLE HALF OF RANGE,3 PCT REMAINDER
Scale TypeSINGLE
Connection Size0.250 IN. NPT DIA IN
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND
Pointer ColorBLACK
Connection TypeEXTERNAL
Connection Quantity1
Connector Type VentNOT PROVIDED
Bezel TypeSNAP-ON
Usage DesignFOR USE W/CARBON DIOXIDE
Scale Range+0.0 TO 600.0 POUNDS PRESSURE PER SQUARE INCH LBS
Actuation TypeSINGLE BOURDON TUBE
Scale NamePRESSURE
Scale Smallest Increment10.0 POUNDS PER SQUARE INCH (PSI) LBS
Surface TreatmentENAMEL CASE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
6685-00-074-4669164456 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ametek, Inc. Div Aerospace & Defense
6685-00-489-0727164416 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ametek, Inc. Div Aerospace & Defense
6685-00-557-5878P845FF-2 1/2-1/8B-0/15 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ametek, Inc. Div Aerospace & Defense
6685-00-618-6696 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-727-7460 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-878-7161164451 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ametek, Inc. Div Aerospace & Defense
6685-00-944-0094 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-951-7111 INTERCHANGEABLE
Gage,pressure,dial Indicating
Cross-Reference Index
Part NumberManufacturer
FS18307 Badger Fire Protection Inc (USA)
1246 Badger Fire Protection Inc (USA)
P845FF-3 1/2-1/4B-0/600 PRIMARY Ametek, Inc. Div Aerospace & Defense (USA)
FS18307 Badger Fire Protection Inc (USA)
1246 Badger Fire Protection Inc (USA)
P645FF Ametek, Inc. Div Aerospace & Defense (USA)
Related Parts
6685-00-074-4669INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
164456
6685-00-489-0727INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
164416
6685-00-557-5878INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
P845FF-2 1/2-1/8B-0/15
6685-00-618-6696INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-727-7460INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-878-7161INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
164451
6685-00-944-0094INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-951-7111INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING

Frequently Asked Questions

What is NSN 6685-00-527-7191?

NSN 6685-00-527-7191 is a Gage,pressure,dial Indicating, manufactured by Ametek, Inc. Div Aerospace & Defense, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-00-527-7191?

NSN 6685-00-527-7191 has 6 cross-referenced part numbers: FS18307 (Badger Fire Protection Inc), 1246 (Badger Fire Protection Inc), P845FF-3 1/2-1/4B-0/600 (Ametek, Inc. Div Aerospace & Defense), FS18307 (Badger Fire Protection Inc), 1246 (Badger Fire Protection Inc) and 1 more.

What NSN replaces 6685-00-527-7191?

There are 8 known substitutes for 6685-00-527-7191: 6685-00-074-4669, 6685-00-489-0727, 6685-00-557-5878 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of P845FF-3 1/2-1/4B-0/600?

Key specifications for P845FF-3 1/2-1/4B-0/600: Overall Depth: 1.250 INCHES NOMINAL IN; Overall Diameter: 4.880 INCHES NOMINAL IN; Material: STEEL CASE; Material: PLASTIC PROTECTIVE CRYSTAL. 29 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-527-7191 still in active supply?

NSN 6685-00-527-7191 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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