PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51F3 1-2 0-5000Gage,pressure,dial Indicating

Liftec Inc Div Liftec, Inc. · NSN 6685-00-257-1571 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-257-1571 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-257-1571. Primary manufacturer part number: 51F3 1-2 0-5000.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • Material: STEEL ACTUATING ELEMENT
  • Material: PLASTIC PROTECTIVE CRYSTAL
  • FSC Application Data: GAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE
  • Material: ALUMINUM CASE
  • Surface Treatment: ENAMEL CASE
  • Color: BLACK CASE
  • Bolt Circle Diameter: 4.312 INCHES NOMINAL IN
Applications
  • Applications requiring Steel Actuating Element construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-257-1571, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Liftec Inc Div Liftec, Inc.. 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
NSN6685-00-257-1571
Primary Part Number51F3 1-2 0-5000
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerLiftec Inc Div Liftec, Inc.
StatusACTIVE
MaterialSTEEL ACTUATING ELEMENT
MaterialPLASTIC PROTECTIVE CRYSTAL
FSC Application DataGAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE
MaterialALUMINUM CASE
Surface TreatmentENAMEL CASE
ColorBLACK CASE
Bolt Circle Diameter4.312 INCHES NOMINAL IN
Mounting Hole Quantity3
Mounting Hole Diameter0.188 INCHES NOMINAL IN
Scale Accuracy1 PCT MIDDLE HALF OF RANGE,1-1/2 PCT REMAINDER
Connection TypeEXTERNAL
Mounting MethodFLUSH PANEL
Connection LocationBACK
AdjustabilityADJUSTABLE
Scale Smallest Increment50.0 POUNDS LBS
Connection Quantity1
Pointer ColorBLACK
Actuation TypeSINGLE BOURDON TUBE
Bezel TypeTHREAD
Scale Range+0.0 TO 5000.0 POUNDS PRESSURE PER SQUARE INCH LBS
Unable to DecodeUNABLE TO DECODE
Connection Size0.250 IN. NPT.DIA IN
Connector Type VentNOT PROVIDED
Dial Size3 1/2 IN. DIA IN
Scale TypeSINGLE
Pointer TypeINDICATING
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND
Scale NamePRESSURE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
6685-00-257-1568 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
51F3 1-2 0-5000 Liftec Inc Div Liftec, Inc. (USA)
2663275-2 Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA)
51F Liftec Inc Div Liftec, Inc. (USA)
Related Parts
6685-00-257-1568INTERCHANGEABLE
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 6685-00-257-1571?

NSN 6685-00-257-1571 is a Gage,pressure,dial Indicating, manufactured by Liftec Inc Div Liftec, Inc., classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-257-1571?

NSN 6685-00-257-1571 has 3 cross-referenced part numbers: 51F3 1-2 0-5000 (Liftec Inc Div Liftec, Inc.), 2663275-2 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 51F (Liftec Inc Div Liftec, Inc.).

What NSN replaces 6685-00-257-1571?

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

What are the specifications of 51F3 1-2 0-5000?

Key specifications for 51F3 1-2 0-5000: Material: STEEL ACTUATING ELEMENT; Material: PLASTIC PROTECTIVE CRYSTAL; Overall Depth: 1.531 INCHES NOMINAL IN; FSC Application Data: GAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE. 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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