PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2663275-1Gage,pressure,dial Indicating

Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier · NSN 6685-00-257-1568 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-257-1568 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-257-1568. Primary manufacturer part number: 2663275-1.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • Mounting Hole Quantity: 3
  • Color: BLACK CASE
  • Bolt Circle Diameter: 4.312 INCHES NOMINAL IN
  • Surface Treatment: ENAMEL CASE
  • FSC Application Data: GAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE
  • Material: STEEL ACTUATING ELEMENT
  • Overall Diameter: 4.938 INCHES NOMINAL IN
Applications
  • Applications requiring Steel Actuating Element construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-257-1568, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-257-1568
Primary Part Number2663275-1
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerNaval Air Systems Command Managed Original Design Activity Not Material/parts Supplier
StatusACTIVE
Mounting Hole Quantity3
ColorBLACK CASE
Bolt Circle Diameter4.312 INCHES NOMINAL IN
Surface TreatmentENAMEL CASE
FSC Application DataGAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE
MaterialSTEEL ACTUATING ELEMENT
Overall Diameter4.938 INCHES NOMINAL IN
MaterialPLASTIC PROTECTIVE CRYSTAL
Connector Type VentNOT PROVIDED
Scale TypeSINGLE
Graduation Unit300.0 POUNDS LBS
Pointer TypeINDICATING
Connection Size0.250 IN. NPT. DIA IN
Bezel TypeTHREAD
Scale Accuracy1 PCT MIDDLE HALF OF RANGE,1-1/2 PCT REMAINDER
MaterialALUMINUM CASE
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND
Scale Range+0.0 TO 1500.0 POUNDS PRESSURE PER SQUARE INCH LBS
Unable to DecodeUNABLE TO DECODE
Connection LocationBACK
Connection Quantity1
AdjustabilityADJUSTABLE
Pointer ColorBLACK
Scale Smallest Increment20.0 POUNDS LBS
Dial Size3 1/2 IN. DIA IN
Connection TypeEXTERNAL
Scale NamePRESSURE
Actuation TypeSINGLE BOURDON TUBE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
6685-00-257-1571 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-526-8483 INTERCHANGEABLE
Gage,pressure,dial Indicating
5940-00-636-60251382B INTERCHANGEABLE
Terminal Board
Birnbach Co Inc
6685-00-807-5952 INTERCHANGEABLE
Gage,pressure,dial Indicating
3439-00-856-9497 INTERCHANGEABLE
Heat Sink,soldering Aid
4730-00-905-1944 INTERCHANGEABLE
Tee,pipe to Tube
6695-01-108-2409 INTERCHANGEABLE
Gage,altitude and Pressure,dial
Cross-Reference Index
Part NumberManufacturer
2663275-1 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA)
51F3 1-2 0-1500 Liftec Inc Div Liftec, Inc. (USA)
51F Liftec Inc Div Liftec, Inc. (USA)
Related Parts
6685-00-257-1571INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-526-8483INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
5940-00-636-6025INTERCHANGEABLE
TERMINAL BOARD
1382B
6685-00-807-5952INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
3439-00-856-9497INTERCHANGEABLE
HEAT SINK,SOLDERING AID
4730-00-905-1944INTERCHANGEABLE
TEE,PIPE TO TUBE
6695-01-108-2409INTERCHANGEABLE
GAGE,ALTITUDE AND PRESSURE,DIAL

Frequently Asked Questions

What is NSN 6685-00-257-1568?

NSN 6685-00-257-1568 is a Gage,pressure,dial Indicating, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-257-1568?

NSN 6685-00-257-1568 has 3 cross-referenced part numbers: 2663275-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 51F3 1-2 0-1500 (Liftec Inc Div Liftec, Inc.), 51F (Liftec Inc Div Liftec, Inc.).

What NSN replaces 6685-00-257-1568?

There are 7 known substitutes for 6685-00-257-1568: 6685-00-257-1571, 6685-00-526-8483, 5940-00-636-6025 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2663275-1?

Key specifications for 2663275-1: Mounting Hole Quantity: 3; Color: BLACK CASE; Overall Depth: 1.531 INCHES NOMINAL IN; Bolt Circle Diameter: 4.312 INCHES NOMINAL IN. 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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