PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-G-7734Gage,pressure,dial Indicating

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 6685-00-553-1995 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-553-1995 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-553-1995. Primary manufacturer part number: MIL-G-7734.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • Actuation Type: DIAPHRAGM
  • Overall Diameter: 2.500 INCHES NOMINAL IN
  • Bolt Circle Diameter: 2.625 INCHES NOMINAL IN
  • Material: PLASTIC CASE
  • Material: GLASS PROTECTIVE CRYSTAL
  • Nondefinitive Spec/std Data: 1 POLISHED
  • Mounting Hole Diameter: 0.138 INCHES NOMINAL IN
Applications
  • Applications requiring Plastic Case construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-553-1995, 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 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6685-00-553-1995
Primary Part NumberMIL-G-7734
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
StatusCANCELLED
Actuation TypeDIAPHRAGM
Overall Diameter2.500 INCHES NOMINAL IN
Bolt Circle Diameter2.625 INCHES NOMINAL IN
MaterialPLASTIC CASE
MaterialGLASS PROTECTIVE CRYSTAL
Nondefinitive Spec/std Data1 POLISHED
Mounting Hole Diameter0.138 INCHES NOMINAL IN
Connection Size0.438 IN. TUBE IN
Connection TypeEXTERNAL
Bezel TypeTHREAD
Dial Size1-7/8 IN. DIA IN
Scale Smallest Increment10.0 POUNDS PER SQUARE INCH (PSI) LBS
Connection Quantity1
Pointer TypeINDICATING
Unable to DecodeUNABLE TO DECODE
Connector Type VentPROVIDED
Scale Inscription/background ColorLUMINOUS FIGURES ON BLACK BACKGROUND
Scale TypeSINGLE
Connection LocationBACK
Scale Accuracy2 PCT ENTIRE RANGE
Graduation Unit100.0 POUNDS PER SQUARE INCH LBS
Scale NamePRESSURE
Scale Range+0.0 TO 300.0 POUNDS PRESSURE PER SQUARE INCH LBS
AdjustabilityADJUSTABLE
Mounting MethodFLUSH PANEL
Mounting Hole Quantity4
MaterialCOPPER ALLOY ACTUATING ELEMENT
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
6620-00-045-8134 INTERCHANGEABLE
Gage,pressure,dial Indicating
6620-00-051-714331855-12 INTERCHANGEABLE
Gage,pressure,dial Indicating
Ranco Inc Ranco Controls Div
6620-00-051-7145 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-515-5764 INTERCHANGEABLE
Gage,vacuum,indicating
6685-00-551-3603 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-555-3054 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-556-8527 INTERCHANGEABLE
Gage,vacuum,indicating
6685-00-557-0220 INTERCHANGEABLE
Gage,pressure,dial Indicating
6620-00-557-0403 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-580-0935 INTERCHANGEABLE
Gage,pressure,dial Indicating
Cross-Reference Index
Part NumberManufacturer
MIL-G-7734 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS28061-T5 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
6620-00-045-8134INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6620-00-051-7143INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
31855-12
6620-00-051-7145INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-515-5764INTERCHANGEABLE
GAGE,VACUUM,INDICATING
6685-00-551-3603INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-555-3054INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-556-8527INTERCHANGEABLE
GAGE,VACUUM,INDICATING
6685-00-557-0220INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6620-00-557-0403INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-580-0935INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-580-0937INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-634-9233INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING

Frequently Asked Questions

What is NSN 6685-00-553-1995?

NSN 6685-00-553-1995 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: cancelled.

What are the part numbers for NSN 6685-00-553-1995?

NSN 6685-00-553-1995 has 2 cross-referenced part numbers: MIL-G-7734 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS28061-T5 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6685-00-553-1995?

There are 12 known substitutes for 6685-00-553-1995: 6620-00-045-8134, 6620-00-051-7143, 6620-00-051-7145 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-G-7734?

Key specifications for MIL-G-7734: Actuation Type: DIAPHRAGM; Overall Diameter: 2.500 INCHES NOMINAL IN; Bolt Circle Diameter: 2.625 INCHES NOMINAL IN; Material: PLASTIC CASE. 29 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-553-1995 still in active supply?

NSN 6685-00-553-1995 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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