PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

50251Gage,pressure,dial Indicating

Aeroil Products Co Inc · NSN 6685-00-542-1406 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-542-1406 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-542-1406. Primary manufacturer part number: 50251.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • Material: COPPER ALLOY 511 ACTUATING ELEMENT
  • Material: PLASTIC PROTECTIVE CRYSTAL
  • Pointer Type: INDICATING
  • Connection Type: EXTERNAL
  • Graduation Unit: 50.000 POUNDS LBS
  • Dial Size: 2-1/2 IN. DIA IN
  • Connector Type Vent: NOT PROVIDED
Applications
  • Applications requiring Copper Alloy 511 Actuating Element construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-542-1406, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Aeroil Products Co Inc. Government technical data includes 26 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 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
NSN6685-00-542-1406
Primary Part Number50251
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerAeroil Products Co Inc
StatusCANCELLED
MaterialCOPPER ALLOY 511 ACTUATING ELEMENT
MaterialPLASTIC PROTECTIVE CRYSTAL
Pointer TypeINDICATING
Connection TypeEXTERNAL
Graduation Unit50.000 POUNDS LBS
Dial Size2-1/2 IN. DIA IN
Connector Type VentNOT PROVIDED
Connection Size1/8 IN. NPT IN
Connection LocationBACK, CENTER
Scale Range+0.000 TO 300.000 POUNDS PRESSURE PER SQUARE INCH LBS
Actuation TypeSINGLE BOURDON TUBE
Pointer ColorBLACK
Stud LocationBACK
AdjustabilityNONADJUSTABLE
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND
Usage DesignW/ALL MEDIA NONCORROSIVE TO BRASS
Stud Quantity2
Scale Accuracy2 PCT MIDDLE HALF OF RANGE,3 PCT REMAINDER
Bezel TypeSLIPS-ON
Scale Smallest Increment10.000 POUNDS LBS
Scale NamePRESSURE
Connection Quantity1
Scale TypeSINGLE
Mounting MethodFLUSH PANEL AND STUD(S) AND BRACKET(S)
MaterialSTEEL CASE
Overall Diameter2.875 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
3110-00-100-0630A4138 INTERCHANGEABLE
Cup,tapered Roller Bearing
The Timken Corporation
6685-00-281-231020-1000H-01B-400 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ashcroft Inc Dba Heise
6685-00-526-01302 1-2 1DFM1-8CBM100RB INTERCHANGEABLE
Gage,pressure,dial Indicating
Bellofram Corporation
6685-00-782-02151-ABB-0440-AGA-001 INTERCHANGEABLE
Gage,pressure,dial Indicating
Bellofram Corporation
5940-01-046-9709002-1320-000 INTERCHANGEABLE
Terminal,lug
Te Connectivity Corporation Dba Microdot Products
4730-01-432-387350251 INTERCHANGEABLE
Expansion Joint,pipe
Hyspan Precision Products, Inc.
Cross-Reference Index
Part NumberManufacturer
50251 PRIMARY Aeroil Products Co Inc (USA)
1000U Ashcroft Inc Dba Heise (USA)
23-2 1-2 1-8-0-300PS1 PRIMARY Liftec Inc Div Liftec, Inc. (USA)
1000U300PSI Ashcroft Inc Dba Heise (USA)
50530M PRIMARY Aeroil Products Co Inc (USA)
Related Parts
3110-00-100-0630INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
A4138
6685-00-281-2310INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
20-1000H-01B-400
6685-00-526-0130INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
2 1-2 1DFM1-8CBM100RB
6685-00-782-0215INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
1-ABB-0440-AGA-001
5940-01-046-9709INTERCHANGEABLE
TERMINAL,LUG
002-1320-000
4730-01-432-3873INTERCHANGEABLE
EXPANSION JOINT,PIPE
50251

Frequently Asked Questions

What is NSN 6685-00-542-1406?

NSN 6685-00-542-1406 is a Gage,pressure,dial Indicating, manufactured by Aeroil Products Co Inc, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-00-542-1406?

NSN 6685-00-542-1406 has 5 cross-referenced part numbers: 50251 (Aeroil Products Co Inc), 1000U (Ashcroft Inc Dba Heise), 23-2 1-2 1-8-0-300PS1 (Liftec Inc Div Liftec, Inc.), 1000U300PSI (Ashcroft Inc Dba Heise), 50530M (Aeroil Products Co Inc).

What NSN replaces 6685-00-542-1406?

There are 6 known substitutes for 6685-00-542-1406: 3110-00-100-0630, 6685-00-281-2310, 6685-00-526-0130 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 50251?

Key specifications for 50251: Material: COPPER ALLOY 511 ACTUATING ELEMENT; Material: PLASTIC PROTECTIVE CRYSTAL; Pointer Type: INDICATING; Connection Type: EXTERNAL. 27 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-542-1406 still in active supply?

NSN 6685-00-542-1406 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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