PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8991-4Gage,pressure,dial Indicating

Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives · NSN 6685-01-139-6453 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-139-6453 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-139-6453. Primary manufacturer part number: 8991-4.
Features
  • Gage,pressure,dial Indicating — FSC 6685
  • 2 verified cross-references
  • Primary manufacturer: Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives
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 6685-01-139-6453, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives. This item has 2 commercial cross-references 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
NSN6685-01-139-6453
Primary Part Number8991-4
Item NameGage,pressure,dial Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerSiemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
1660-00-180-6451477310 INTERCHANGEABLE
Strainer,metering N
Meggitt Troy Inc
5935-00-259-0205 INTERCHANGEABLE
Adapter,connector
2910-00-361-964389914 INTERCHANGEABLE
Carburetor,float
Briggs and Stratton Corp
4920-00-958-59308991 INTERCHANGEABLE
Cylinder,air
Honeywell Limited Dba Honeywell Aerospace Toronto Div Aerospace-Toronto
6145-01-080-92948991 INTERCHANGEABLE
Cable,power,electrical
Rscc Wire & Cable Llc Dba Marmon Industrial Energy & Infrastructure - East Granby
7510-01-108-01747000049778 INTERCHANGEABLE
Tape,pressure Sensitive Adhesive
3m Company
6530-01-343-34498991 INTERCHANGEABLE
Disposal Container,biohazardous
Covidien Sales Llc Dba Covidien Sales
5975-01-479-02686625 INTERCHANGEABLE
Box Connector,electrical
Shepherd Electric Company, Llc Dba Shepherd Electric Co Inc
Cross-Reference Index
Part NumberManufacturer
8991-4 PRIMARY Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives (USA)
8991 Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives (USA)
Related Parts
1660-00-180-6451INTERCHANGEABLE
STRAINER,METERING N
477310
5935-00-259-0205INTERCHANGEABLE
ADAPTER,CONNECTOR
2910-00-361-9643INTERCHANGEABLE
CARBURETOR,FLOAT
89914
4920-00-958-5930INTERCHANGEABLE
CYLINDER,AIR
8991
6145-01-080-9294INTERCHANGEABLE
CABLE,POWER,ELECTRICAL
8991
7510-01-108-0174INTERCHANGEABLE
TAPE,PRESSURE SENSITIVE ADHESIVE
7000049778
6530-01-343-3449INTERCHANGEABLE
DISPOSAL CONTAINER,BIOHAZARDOUS
8991
5975-01-479-0268INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
6625

Frequently Asked Questions

What is NSN 6685-01-139-6453?

NSN 6685-01-139-6453 is a Gage,pressure,dial Indicating, manufactured by Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-01-139-6453?

NSN 6685-01-139-6453 has 2 cross-referenced part numbers: 8991-4 (Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives), 8991 (Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives).

What NSN replaces 6685-01-139-6453?

There are 8 known substitutes for 6685-01-139-6453: 1660-00-180-6451, 5935-00-259-0205, 2910-00-361-9643 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8991-4?

Key specifications for 8991-4: End Item Identification: POSEIDON MATERIAL. 1 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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