PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4 1-2 100SFMH1-2LBM3000Gage,pressure,dial Indicating

Bellofram Corporation · NSN 6685-00-225-9816 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-225-9816 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-225-9816. Primary manufacturer part number: 4 1-2 100SFMH1-2LBM3000.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • Material: STEEL ACTUATING ELEMENT
  • Surface Treatment: ENAMEL CASE
  • FSC Application Data: GAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE
  • Material: GLASS PROTECTIVE CRYSTAL
  • Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY SINGLE READING SCALE,DIAL DATA,CASE DATA,CONNECTION DATA,MOUNTING DATA,AND SPECIAL FEATURES
  • Material: STEEL CASE
  • Connection Size: 1/2 IN. NPT IN
Applications
  • Applications requiring Steel Actuating Element construction
General Description

The Gage,pressure,dial Indicating, cataloged under National Stock Number 6685-00-225-9816, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Bellofram Corporation. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-225-9816
Primary Part Number4 1-2 100SFMH1-2LBM3000
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerBellofram Corporation
StatusACTIVE
MaterialSTEEL ACTUATING ELEMENT
Surface TreatmentENAMEL CASE
FSC Application DataGAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE
MaterialGLASS PROTECTIVE CRYSTAL
Reference Number Differentiating CharacteristicsAS DIFFERENTIATED BY SINGLE READING SCALE,DIAL DATA,CASE DATA,CONNECTION DATA,MOUNTING DATA,AND SPECIAL FEATURES
MaterialSTEEL CASE
Connection Size1/2 IN. NPT IN
Connection LocationBACK, LOWER
Scale TypeSINGLE
Scale Accuracy1/2 TO 1 PCT ENTIRE RANGE
Actuation TypeSINGLE BOURDON TUBE
Pointer TypeINDICATING
Pointer ColorBLACK
AdjustabilityADJUSTABLE
Scale Range+0.000 TO 3000.000 POUNDS PRESSURE PER SQUARE INCH LBS
Connector Type VentNOT PROVIDED
Dial Size4-1/2 IN. DIA IN
Connection TypeEXTERNAL
Graduation Unit300.0 POUNDS LBS
Scale Smallest Increment25.0 POUNDS LBS
Scale NamePRESSURE
Bezel TypeHINGE
Scale Inscription/background ColorBLACK FIGURES ON WHITE BACKGROUND
Connection Quantity1
Mounting MethodFLUSH PANEL
Mounting Hole Diameter0.219 INCHES NOMINAL IN
Mounting Hole Quantity3
Bolt Circle Diameter5.687 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
6685-00-585-4237100SFMH6000 INTERCHANGEABLE
Gage,pressure,dial Indicating
Bellofram Corporation
6685-00-894-4922 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-00-902-49181YBF317ATA INTERCHANGEABLE
Gage,pressure,dial Indicating
Bellofram Corporation
Cross-Reference Index
Part NumberManufacturer
4 1-2 100SFMH1-2LBM3000 Bellofram Corporation (USA)
100SFMH Desco Corp Marsh Bellofram Div (USA)
4 1-2 100SFMH1-2LBM3000 Desco Corp Marsh Bellofram Div (USA)
100SFMH Bellofram Corporation (USA)
Related Parts
6685-00-585-4237INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
100SFMH6000
6685-00-894-4922INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-00-902-4918INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
1YBF317ATA

Frequently Asked Questions

What is NSN 6685-00-225-9816?

NSN 6685-00-225-9816 is a Gage,pressure,dial Indicating, manufactured by Bellofram Corporation, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-225-9816?

NSN 6685-00-225-9816 has 4 cross-referenced part numbers: 4 1-2 100SFMH1-2LBM3000 (Bellofram Corporation), 100SFMH (Desco Corp Marsh Bellofram Div), 4 1-2 100SFMH1-2LBM3000 (Desco Corp Marsh Bellofram Div), 100SFMH (Bellofram Corporation).

What NSN replaces 6685-00-225-9816?

There are 3 known substitutes for 6685-00-225-9816: 6685-00-585-4237, 6685-00-894-4922, 6685-00-902-4918. Verify interchangeability with system specifications before substitution.

What are the specifications of 4 1-2 100SFMH1-2LBM3000?

Key specifications for 4 1-2 100SFMH1-2LBM3000: Overall Depth: 1.766 INCHES NOMINAL IN; Material: STEEL ACTUATING ELEMENT; Surface Treatment: ENAMEL CASE; FSC Application Data: GAGE,PRESSURE,DIAL INDICATING,EXCEPT ENGINE. 30 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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