PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-G-18997Gage,pressure,dial Indicating

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 6685-01-475-0097 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-475-0097 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-475-0097. Primary manufacturer part number: MIL-G-18997.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • Mounting Method: FLANGE
  • Mounting Hole Quantity: 3
  • Overall Diameter: 5.375 INCHES NOMINAL IN
  • Pointer Color: BLACK
  • Connector Type Vent: NOT PROVIDED
  • Connection Quantity: 1
  • Connection Location: BOTTOM
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-01-475-0097, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-01-475-0097
Primary Part NumberMIL-G-18997
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Mounting MethodFLANGE
Mounting Hole Quantity3
Overall Diameter5.375 INCHES NOMINAL IN
Pointer ColorBLACK
Connector Type VentNOT PROVIDED
Connection Quantity1
Connection LocationBOTTOM
Connection Size0-RING
Scale Smallest Increment1.0 POUNDS PER SQUARE INCH (PSI) LBS
Pointer TypeINDICATING
Connection TypeEXTERNAL
Scale Range+0.0 TO 30.0 POUNDS PRESSURE PER SQUARE INCH LBS
Scale NamePOUNDS PRESSURE
Dial Size4-1/2 IN NPT IN
Scale TypeDIAL
AdjustabilityNONADJUSTABLE
Graduation Unit5.0 POUNDS PER SQUARE INCH LBS
Bolt Circle Diameter5.380 INCHES NOMINAL IN
Actuation TypeBOURDON TUBE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6685-01-087-9079EA24-3CYF-RWB0 INTERCHANGEABLE
Gage,compound Pressure-Vacuum,di
Ashcroft Inc Dba Heise
6685-01-418-4754EA24-3CUF-LWBO INTERCHANGEABLE
Gage,pressure,dial Indicating
Mmc Metrology Lab, Inc. Dba Mmc Metrology Lab Inc
6685-01-490-3189 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-01-491-0468 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-01-491-0471 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-01-493-1692 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-01-501-1312 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-01-547-9310 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-01-547-9313 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-01-588-8895 INTERCHANGEABLE
Gage,pressure,dial Indicating
Cross-Reference Index
Part NumberManufacturer
MIL-G-18997 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
G27-351 Ashcroft Inc Dba Heise (USA)
SG4MN30PWRANAG Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
EA24-3PDP-RWBO Weksler Glass Thermometer Corp (USA)
Related Parts
6685-01-087-9079INTERCHANGEABLE
GAGE,COMPOUND PRESSURE-VACUUM,DI
EA24-3CYF-RWB0
6685-01-418-4754INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
EA24-3CUF-LWBO
6685-01-490-3189INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-01-491-0468INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-01-491-0471INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-01-493-1692INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-01-501-1312INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-01-547-9310INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-01-547-9313INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-01-588-8895INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-01-588-8901INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-01-626-2614INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING

Frequently Asked Questions

What is NSN 6685-01-475-0097?

NSN 6685-01-475-0097 is a Gage,pressure,dial Indicating, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-01-475-0097?

NSN 6685-01-475-0097 has 4 cross-referenced part numbers: MIL-G-18997 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), G27-351 (Ashcroft Inc Dba Heise), SG4MN30PWRANAG (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), EA24-3PDP-RWBO (Weksler Glass Thermometer Corp).

What NSN replaces 6685-01-475-0097?

There are 12 known substitutes for 6685-01-475-0097: 6685-01-087-9079, 6685-01-418-4754, 6685-01-490-3189 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-G-18997?

Key specifications for MIL-G-18997: Mounting Method: FLANGE; Mounting Hole Quantity: 3; Overall Diameter: 5.375 INCHES NOMINAL IN; Pointer Color: BLACK. 19 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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