PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8921-0-10000PSIGage,pressure,dial Indicating

United Instrument Co · NSN 6685-01-407-8391 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-407-8391 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-407-8391. Primary manufacturer part number: 8921-0-10000PSI.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • 6 verified cross-references
  • Primary manufacturer: United Instrument Co
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 6685-01-407-8391, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is United Instrument Co. This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameGage,pressure,dial Indicating
FSC / FSG6685 — No Item Name Available (FSG 66)
ManufacturersUnited Instrument Co (CAGE 08894); Torc Tec Calibrations, Inc (CAGE 3J738); Naval Air Warfare Center Aircraft Division Joint Base Jbmdl (CAGE 80020); Enfm-Usa Inc (CAGE 0FM45)
Technical Specifications
ParameterValue
NSN6685-01-407-8391
Primary Part Number8921-0-10000PSI
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerUnited Instrument Co
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5975-00-345-0679 INTERCHANGEABLE
Arm,cable Extension
6105-00-635-9718 INTERCHANGEABLE
Motor,direct Current
6750-01-427-0117 INTERCHANGEABLE
Film,photographic
6685-01-519-6041080055 INTERCHANGEABLE
Gage,pressure,dial Indicating
Unex Corp Div Hytorc Division Unex Corporation
5985-01-726-12568921 INTERCHANGEABLE
Attenuator,fixed
Bird Electronic Corporation Div Bird Electronic Corp
Cross-Reference Index
Part NumberManufacturer
8921-0-10000PSI United Instrument Co (USA)
080055 Torc Tec Calibrations, Inc (USA)
8921-0-10000PSIL/2NPT United Instrument Co (USA)
523846 Naval Air Warfare Center Aircraft Division Joint Base Jbmdl (USA)
8921-0-10KPSI1/ United Instrument Co (USA)
8921 Enfm-Usa Inc (USA)
Related Parts
5975-00-345-0679INTERCHANGEABLE
ARM,CABLE EXTENSION
6105-00-635-9718INTERCHANGEABLE
MOTOR,DIRECT CURRENT
6750-01-427-0117INTERCHANGEABLE
FILM,PHOTOGRAPHIC
6685-01-519-6041INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
080055
5985-01-726-1256INTERCHANGEABLE
ATTENUATOR,FIXED
8921

Frequently Asked Questions

What is NSN 6685-01-407-8391?

NSN 6685-01-407-8391 is a Gage,pressure,dial Indicating, manufactured by United Instrument Co, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-01-407-8391?

NSN 6685-01-407-8391 has 6 cross-referenced part numbers: 8921-0-10000PSI (United Instrument Co), 080055 (Torc Tec Calibrations, Inc), 8921-0-10000PSIL/2NPT (United Instrument Co), 523846 (Naval Air Warfare Center Aircraft Division Joint Base Jbmdl), 8921-0-10KPSI1/ (United Instrument Co) and 1 more.

What NSN replaces 6685-01-407-8391?

There are 5 known substitutes for 6685-01-407-8391: 5975-00-345-0679, 6105-00-635-9718, 6750-01-427-0117 and 2 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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