PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B-90Glass,liquid Sight Indicator,fla

Ernst Flow Industries · NSN 6680-01-305-8057 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-01-305-8057 — this item is cataloged by the U.S. Government under National Stock Number 6680-01-305-8057. Primary manufacturer part number: B-90.
Features
  • Glass,liquid Sight Indicator,fla — FSC 6680
  • Overall Thickness: 0.688 INCHES NOMINAL IN
  • Design Type: PLAIN
  • 1 verified cross-reference
  • Primary manufacturer: Ernst Flow Industries
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Glass,liquid Sight Indicator,fla, cataloged under National Stock Number 6680-01-305-8057, is classified within Federal Supply Class 6680 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Ernst Flow Industries. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6680-01-305-8057
Primary Part NumberB-90
Item NameGlass,liquid Sight Indicator,fla
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerErnst Flow Industries
StatusACTIVE
Overall Thickness0.688 INCHES NOMINAL IN
Design TypePLAIN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
2910-00-218-2528B90 INTERCHANGEABLE
Valve Assembly,floa
Wildfire Pacific Inc
5305-00-487-4977B90 INTERCHANGEABLE
Screw-Bridge
Power Control Devices Inc
5340-00-527-2076B90 INTERCHANGEABLE
Bumper
Kirkhill Inc
3030-00-529-0471 INTERCHANGEABLE
Belt,v
3030-00-702-1447B90HYT3 INTERCHANGEABLE
Belts,v,matched Set
Contitech Usa, Inc Dba Veyance Technologies
3030-01-133-8098B90 INTERCHANGEABLE
Belt,bearing
Carrier Corp
6635-01-391-5952B-90 INTERCHANGEABLE
Tensiometer
Loos & Co., Inc. Div Cableware Divison
6250-01-668-9334B90 INTERCHANGEABLE
Ballast,lamp
The Bodine Co
Cross-Reference Index
Part NumberManufacturer
B-90 Ernst Flow Industries (USA)
Related Parts
2910-00-218-2528INTERCHANGEABLE
VALVE ASSEMBLY,FLOA
B90
5305-00-487-4977INTERCHANGEABLE
SCREW-BRIDGE
B90
5340-00-527-2076INTERCHANGEABLE
BUMPER
B90
3030-00-529-0471INTERCHANGEABLE
BELT,V
3030-00-702-1447INTERCHANGEABLE
BELTS,V,MATCHED SET
B90HYT3
3030-01-133-8098INTERCHANGEABLE
BELT,BEARING
B90
6635-01-391-5952INTERCHANGEABLE
TENSIOMETER
B-90
6250-01-668-9334INTERCHANGEABLE
BALLAST,LAMP
B90

Frequently Asked Questions

What is NSN 6680-01-305-8057?

NSN 6680-01-305-8057 is a Glass,liquid Sight Indicator,fla, manufactured by Ernst Flow Industries, classified under FSC 6680 (No Item Name Available). Status: active.

What are the part numbers for NSN 6680-01-305-8057?

NSN 6680-01-305-8057 has 1 cross-referenced part number: B-90 (Ernst Flow Industries).

What NSN replaces 6680-01-305-8057?

There are 8 known substitutes for 6680-01-305-8057: 2910-00-218-2528, 5305-00-487-4977, 5340-00-527-2076 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of B-90?

Key specifications for B-90: Overall Thickness: 0.688 INCHES NOMINAL IN; Design Type: PLAIN; Overall Length: 13.375 INCHES NOMINAL IN; Overall Width: 1.312 INCHES NOMINAL IN. 4 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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