PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

P645FFGage,pressure,dial Indicating

Ametek, Inc. Div Aerospace & Defense · NSN 6685-00-951-7111 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-951-7111 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-951-7111. Primary manufacturer part number: P645FF.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • Material: GLASS PROTECTIVE CRYSTAL
  • Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY SCALE TYPE,DIAL SIZE,SCALE MARKING,POINTER TYPE,POINTER MARKING,POINTER COLOR,ADJUSTABILITY,CONNECTION QUANTITY,CONNECTION TYPE,CONNECTION LOCATION,CONNECTION SIZE,MOUNTING METHOD,BOLT CIRCLE DIAMETER,MOUNTING HOLE QUANTITY,AND MOUNTING HOLE DIAMETER
  • Material: BRASS CASE
  • Nondefinitive Spec/std Data: 1 POLISHED
  • Material: COPPER ALLOY 511 ACTUATING ELEMENT
  • Surface Treatment: CHROMIUM CASE
  • Mounting Hole Quantity: 3
Applications
  • Applications requiring Glass Protective Crystal construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-951-7111, 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 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference 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
NSN6685-00-951-7111
Primary Part NumberP645FF
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerAmetek, Inc. Div Aerospace & Defense
StatusACTIVE
MaterialGLASS PROTECTIVE CRYSTAL
Reference Number Differentiating CharacteristicsAS DIFFERENTIATED BY SCALE TYPE,DIAL SIZE,SCALE MARKING,POINTER TYPE,POINTER MARKING,POINTER COLOR,ADJUSTABILITY,CONNECTION QUANTITY,CONNECTION TYPE,CONNECTION LOCATION,CONNECTION SIZE,MOUNTING METHOD,BOLT CIRCLE DIAMETER,MOUNTING HOLE QUANTITY,AND MOUNTING HOLE DIAMETER
MaterialBRASS CASE
Nondefinitive Spec/std Data1 POLISHED
MaterialCOPPER ALLOY 511 ACTUATING ELEMENT
Surface TreatmentCHROMIUM CASE
Mounting Hole Quantity3
Overall Diameter2.810 INCHES NOMINAL IN
AdjustabilityNONADJUSTABLE
Graduation Unit3.0 POUNDS LBS
Connection Size1/8 IN. NPT IN
Pointer ColorBLACK
Scale Accuracy2 PCT MIDDLE HALF OF RANGE
Pointer TypeINDICATING
Bezel TypeTHREAD
Mounting MethodFLUSH PANEL
Scale TypeSINGLE
Connection LocationBACK
Dial Size2 IN. DIA IN
Connector Type VentNOT PROVIDED
Actuation TypeSINGLE BOURDON TUBE
Usage DesignFOR USE W/STEAM,GAS,OIL,WATER OR ANY FLUID NONCORROSIVE TO BRASS OR BRONZE
Scale NamePRESSURE
Scale Range+0.000 TO 15.000 POUNDS PRESSURE PER SQUARE INCH LBS
Connection TypeEXTERNAL
Connection Quantity1
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND
Scale Smallest Increment0.5 POUNDS LBS
Mounting Hole Diameter0.166 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
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
6685-00-527-7191P845FF-3 1/2-1/4B-0/600 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
Cross-Reference Index
Part NumberManufacturer
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
6685-00-527-7191INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
P845FF-3 1/2-1/4B-0/600
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

Frequently Asked Questions

What is NSN 6685-00-951-7111?

NSN 6685-00-951-7111 is a Gage,pressure,dial Indicating, manufactured by Ametek, Inc. Div Aerospace & Defense, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-951-7111?

NSN 6685-00-951-7111 has 1 cross-referenced part number: P645FF (Ametek, Inc. Div Aerospace & Defense).

What NSN replaces 6685-00-951-7111?

There are 8 known substitutes for 6685-00-951-7111: 6685-00-074-4669, 6685-00-489-0727, 6685-00-527-7191 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of P645FF?

Key specifications for P645FF: Overall Depth: 1.360 INCHES NOMINAL IN; Material: GLASS PROTECTIVE CRYSTAL; Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY SCALE TYPE,DIAL SIZE,SCALE MARKING,POINTER TYPE,POINTER MARKING,POINTER COLOR,ADJUSTABILITY,CONNECTION QUANTITY,CONNECTION TYPE,CONNECTION LOCATION,CONNECTION SIZE,MOUNTING METHOD,BOLT CIRCLE DIAMETER,MOUNTING HOLE QUANTITY,AND MOUNTING HOLE DIAMETER; Material: BRASS CASE. 30 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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