PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31855-34AGage,pressure,dial Indicating

Ranco Inc Ranco Controls Div · NSN 6620-00-051-7145 · FSC 6620 · No Item Name Available
Verified by PartsTable
NSN 6620-00-051-7145 — this item is cataloged by the U.S. Government under National Stock Number 6620-00-051-7145. Primary manufacturer part number: 31855-34A.
Features
  • Gage,pressure,dial Indicating — FSC 6620
  • Overall Diameter: 3.130 INCHES NOMINAL IN
  • Connection Size: 1/4 IN. NPT IN
  • Connector Type Vent: NOT PROVIDED
  • Material: PLASTIC CASE
  • Connection Location: BACK
  • Scale Inscription/background Color: LUMINOUS FIGURES ON BLACK BACKGROUND
  • FSC Application Data: 1. GAGE,PRESSURE,DIAL INDICATING,ENGINE
Applications
  • Applications requiring Plastic Case construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6620-00-051-7145, is classified within Federal Supply Class 6620 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Ranco Inc Ranco Controls Div. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 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
NSN6620-00-051-7145
Primary Part Number31855-34A
Item NameGage,pressure,dial Indicating
FSC / FSG6620 / 66 — No Item Name Available
ManufacturerRanco Inc Ranco Controls Div
StatusCANCELLED
Overall Diameter3.130 INCHES NOMINAL IN
Connection Size1/4 IN. NPT IN
Connector Type VentNOT PROVIDED
MaterialPLASTIC CASE
Connection LocationBACK
Scale Inscription/background ColorLUMINOUS FIGURES ON BLACK BACKGROUND
FSC Application Data1. GAGE,PRESSURE,DIAL INDICATING,ENGINE
Mounting MethodFLUSH PANEL
Surface TreatmentENAMEL LUSTERLESS CASE
Scale Accuracy3 PCT ENTIRE RANGE
Mounting Hole Quantity4
MaterialGLASS PROTECTIVE CRYSTAL
Mounting Hole Diameter0.196 INCHES NOMINAL IN
MaterialCOPPER ALLOY ACTUATING ELEMENT
Bolt Circle Diameter3.505 INCHES NOMINAL IN
Graduation Unit10.000 POUNDS LBS
Scale TypeSINGLE
Actuation TypeDIAPHRAGM
Scale Range+0.000 TO 25.000 POUNDS PRESSURE PER SQUARE INCH LBS
Scale NamePRESSURE
Scale Smallest Increment1.000 POUNDS LBS
Dial Size2-3/4 IN. DIA IN
Connection Quantity2
Pointer MarkingNO. 3; 4
Pointer TypeINDICATING
AdjustabilityADJUSTABLE
Unable to DecodeUNABLE TO DECODE
ColorBLACK CASE
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
6685-00-515-5764 INTERCHANGEABLE
Gage,vacuum,indicating
6685-00-551-3603 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-553-1995 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
31855-34A Ranco Inc Ranco Controls Div (USA)
31855-34A Ranco Management Corp (USA)
MILG7734 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS28064-4 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
6685-00-515-5764INTERCHANGEABLE
GAGE,VACUUM,INDICATING
6685-00-551-3603INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-553-1995INTERCHANGEABLE
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 6620-00-051-7145?

NSN 6620-00-051-7145 is a Gage,pressure,dial Indicating, manufactured by Ranco Inc Ranco Controls Div, classified under FSC 6620 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6620-00-051-7145?

NSN 6620-00-051-7145 has 4 cross-referenced part numbers: 31855-34A (Ranco Inc Ranco Controls Div), 31855-34A (Ranco Management Corp), MILG7734 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS28064-4 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6620-00-051-7145?

There are 12 known substitutes for 6620-00-051-7145: 6620-00-045-8134, 6620-00-051-7143, 6685-00-515-5764 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 31855-34A?

Key specifications for 31855-34A: Overall Depth: 3.125 INCHES NOMINAL IN; Overall Diameter: 3.130 INCHES NOMINAL IN; Connection Size: 1/4 IN. NPT IN; Connector Type Vent: NOT PROVIDED. 29 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6620-00-051-7145 still in active supply?

NSN 6620-00-051-7145 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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