PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

65166Gage,pressure,dial Indicating

Drs Environmental Systems Inc · NSN 6685-01-027-5903 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-027-5903 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-027-5903. Primary manufacturer part number: 65166.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • Material: PLASTIC ACRYLIC PROTECTIVE CRYSTAL
  • Color: BLACK CASE
  • Material: BRASS ACTUATING ELEMENT
  • Material: STEEL CASE
  • Surface Treatment: ENAMEL CASE
  • Bezel Type: SLIPS-ON
  • Scale Smallest Increment: 5.0 POUNDS PER SQUARE INCH (PSI) LBS
Applications
  • Applications requiring Plastic Acrylic Protective Crystal construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-027-5903, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Drs Environmental Systems Inc. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6685-01-027-5903
Primary Part Number65166
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerDrs Environmental Systems Inc
StatusCANCELLED
MaterialPLASTIC ACRYLIC PROTECTIVE CRYSTAL
ColorBLACK CASE
MaterialBRASS ACTUATING ELEMENT
MaterialSTEEL CASE
Surface TreatmentENAMEL CASE
Bezel TypeSLIPS-ON
Scale Smallest Increment5.0 POUNDS PER SQUARE INCH (PSI) LBS
Dial Size4-1/2 IN. DIA IN
Pointer TypeINDICATING
Scale NamePRESSURE
Scale Inscription/background ColorBLACK MARKINGS ON WHITE BACKGROUND
Connection LocationLOWER BACK
AdjustabilityADJUSTABLE
Connection Size0.250 IN. NPT DIA IN
Mounting MethodCLAMP AND FLUSH PANEL AND STUD(S)
Pointer ColorBLACK
Connection TypeEXTERNAL
Stud LocationBACK
Actuation TypeBOURDON TUBE
Scale Range+0.0 TO 600.0 POUNDS PRESSURE PER SQUARE INCH LBS
Connection Quantity1
Graduation Unit50.0 POUNDS PER SQUARE INCH LBS
Scale AccuracyPORM 1 PCT FULL RANGE
Stud Quantity2
Scale TypeSINGLE
Connector Type VentNOT PROVIDED
Overall Diameter6.188 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
5940-00-197-9764 INTERCHANGEABLE
Terminal,lug
1610-00-594-1231524713 INTERCHANGEABLE
Cap,dome
Hamilton Sundstrand Corporation Dba Collins Aerospace
5360-01-285-588665166 INTERCHANGEABLE
Spring Special
Leslie Controls, Inc. Dba Leslie Controls Inc
6680-01-443-192768427 INTERCHANGEABLE
Indicator,sight,liquid
Tyco Fire Products Lp
1680-01-483-771468427 INTERCHANGEABLE
Piston,reaction Cylinder
Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations
Cross-Reference Index
Part NumberManufacturer
65166 Drs Environmental Systems Inc (USA)
6685PL2031088 Jednolity Indeks Materialowy - Uniform Material Index (POL)
65166 Davey Compressor Co Div of Keco Industries Inc (USA)
4 1-2 1FMSU 1-4LBM600 Desco Corp Marsh Bellofram Div (USA)
1-RBF-23370-ATC-001 Desco Corp Marsh Bellofram Div (USA)
1-RBF-23330-ATC-002 Desco Corp Marsh Bellofram Div (USA)
68427 Davey Compressor Co Div of Keco Industries Inc (USA)
1-RBF-23370-ATC-001 Bellofram Corporation (USA)
Related Parts
5940-00-197-9764INTERCHANGEABLE
TERMINAL,LUG
1610-00-594-1231INTERCHANGEABLE
CAP,DOME
524713
5360-01-285-5886INTERCHANGEABLE
SPRING SPECIAL
65166
6680-01-443-1927INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
68427
1680-01-483-7714INTERCHANGEABLE
PISTON,REACTION CYLINDER
68427

Frequently Asked Questions

What is NSN 6685-01-027-5903?

NSN 6685-01-027-5903 is a Gage,pressure,dial Indicating, manufactured by Drs Environmental Systems Inc, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-01-027-5903?

NSN 6685-01-027-5903 has 8 cross-referenced part numbers: 65166 (Drs Environmental Systems Inc), 6685PL2031088 (Jednolity Indeks Materialowy - Uniform Material Index), 65166 (Davey Compressor Co Div of Keco Industries Inc), 4 1-2 1FMSU 1-4LBM600 (Desco Corp Marsh Bellofram Div), 1-RBF-23370-ATC-001 (Desco Corp Marsh Bellofram Div) and 3 more.

What NSN replaces 6685-01-027-5903?

There are 5 known substitutes for 6685-01-027-5903: 5940-00-197-9764, 1610-00-594-1231, 5360-01-285-5886 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 65166?

Key specifications for 65166: Material: PLASTIC ACRYLIC PROTECTIVE CRYSTAL; Color: BLACK CASE; Material: BRASS ACTUATING ELEMENT; Material: STEEL CASE. 28 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-01-027-5903 still in active supply?

NSN 6685-01-027-5903 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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