PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7550478-G7656221-0F216Indicator,pressure

Naval Sea Systems Command · NSN 6685-01-641-6634 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-641-6634 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-641-6634. Primary manufacturer part number: 7550478-G7656221-0F216.
Features
  • Indicator,pressure — FSC 6685
  • Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PRODURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES
  • Presentation Type: DIAL
  • Criticality Code Justification: ZZZY
  • Material: ALUMINUM CASE
  • 14 verified cross-references
  • Primary manufacturer: Naval Sea Systems Command
Applications
  • Applications requiring Aluminum Case construction
General Description

The Indicator,pressure, cataloged under National Stock Number 6685-01-641-6634, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Naval Sea Systems Command. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 14 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-01-641-6634
Primary Part Number7550478-G7656221-0F216
Item NameIndicator,pressure
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerNaval Sea Systems Command
StatusACTIVE
Reference Number Differentiating CharacteristicsMATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PRODURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES
Presentation TypeDIAL
Criticality Code JustificationZZZY
MaterialALUMINUM CASE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
6685-01-418-4759 INTERCHANGEABLE
Gage,pressure,dial Indicating
6685-01-491-0468 INTERCHANGEABLE
Gage,pressure,dial Indicating
Cross-Reference Index
Part NumberManufacturer
7550478-G7656221-0F216 Naval Sea Systems Command (USA)
G547-0002-G7286221-0F216D4 Naval Inventory Control Point Mechanicsburg (USA)
G7286221-0F216 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
G765-6221 PN F216D4 Naval Inventory Control Point Mechanicsburg (USA)
592-7385379 PN F216D4 Naval Inventory Control Point Mechanicsburg (USA)
EA24-3PHF-LWBO Ashcroft Inc Dba Heise (USA)
G547-0002-G7286221-0F216 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
EA24-3PHF-LWBOD4 Naval Inventory Control Point Mechanicsburg (USA)
218016748GND4 Naval Inventory Control Point Mechanicsburg (USA)
G765-6221 PN F216 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
7550478-G7656221-0F216D4 Naval Inventory Control Point Mechanicsburg (USA)
G7286221-0F216D4 Naval Inventory Control Point Mechanicsburg (USA)
218016748GN Electric Boat Corporation Div General Dynamics Electric Boat (USA)
592-7385379 PN F216 Naval Sea Systems Command (USA)
Related Parts
6685-01-418-4759INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
6685-01-491-0468INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING

Frequently Asked Questions

What is NSN 6685-01-641-6634?

NSN 6685-01-641-6634 is a Indicator,pressure, manufactured by Naval Sea Systems Command, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-01-641-6634?

NSN 6685-01-641-6634 has 14 cross-referenced part numbers: 7550478-G7656221-0F216 (Naval Sea Systems Command), G547-0002-G7286221-0F216D4 (Naval Inventory Control Point Mechanicsburg), G7286221-0F216 (Electric Boat Corporation Div General Dynamics Electric Boat), G765-6221 PN F216D4 (Naval Inventory Control Point Mechanicsburg), 592-7385379 PN F216D4 (Naval Inventory Control Point Mechanicsburg) and 9 more.

What NSN replaces 6685-01-641-6634?

There are 2 known substitutes for 6685-01-641-6634: 6685-01-418-4759, 6685-01-491-0468. Verify interchangeability with system specifications before substitution.

What are the specifications of 7550478-G7656221-0F216?

Key specifications for 7550478-G7656221-0F216: Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PRODURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES; Presentation Type: DIAL; Criticality Code Justification: ZZZY; Material: ALUMINUM CASE. 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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