PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1977-4Diaphragm Assembly,top

Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives · NSN 6680-00-798-2930 · FSC 6680 · No Item Name Available
Verified by PartsTable
NSN 6680-00-798-2930 — this item is cataloged by the U.S. Government under National Stock Number 6680-00-798-2930. Primary manufacturer part number: 1977-4.
Features
  • Diaphragm Assembly,top — FSC 6680
  • 3 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 Diaphragm Assembly,top, cataloged under National Stock Number 6680-00-798-2930, is classified within Federal Supply Class 6680 (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 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6680-00-798-2930
Primary Part Number1977-4
Item NameDiaphragm Assembly,top
FSC / FSG6680 / 66 — No Item Name Available
ManufacturerSiemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3120-00-005-0464 INTERCHANGEABLE
Bushing,sleeve
5340-00-073-080419774 INTERCHANGEABLE
Seat,helical Compression Spring
Cadillac Gage Textron Inc.
4310-00-174-02901977 INTERCHANGEABLE
Ring,piston
Kaydon Ring & Seal Inc Dba Skf Precision Technologies
4730-00-279-0364 INTERCHANGEABLE
Fitting,lubrication
3120-00-353-05901977 INTERCHANGEABLE
Bushing,sleeve
Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.
6240-00-433-27071977 INTERCHANGEABLE
Lamp,incandescent
Micro Lamps Inc.
5360-00-664-3628 INTERCHANGEABLE
Spring,helical,compression
5330-01-010-9695197-7 INTERCHANGEABLE
Seal
The Specialty Mfg. Co Dba Specialty Mfg. Co
7450-01-051-5998 INTERCHANGEABLE
Reproducer,sound
5330-01-102-4681132-0369 INTERCHANGEABLE
Seal,plain
Caterpillar Inc Div Caterpillar Defense
Cross-Reference Index
Part NumberManufacturer
1977-4 PRIMARY Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives (USA)
1977 Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives (USA)
1977-4 Siemens Moore Process Automation (GBR)
Related Parts
3120-00-005-0464INTERCHANGEABLE
BUSHING,SLEEVE
5340-00-073-0804INTERCHANGEABLE
SEAT,HELICAL COMPRESSION SPRING
19774
4310-00-174-0290INTERCHANGEABLE
RING,PISTON
1977
4730-00-279-0364INTERCHANGEABLE
FITTING,LUBRICATION
3120-00-353-0590INTERCHANGEABLE
BUSHING,SLEEVE
1977
6240-00-433-2707INTERCHANGEABLE
LAMP,INCANDESCENT
1977
5360-00-664-3628INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
5330-01-010-9695INTERCHANGEABLE
SEAL
197-7
7450-01-051-5998INTERCHANGEABLE
REPRODUCER,SOUND
5330-01-102-4681INTERCHANGEABLE
SEAL,PLAIN
132-0369
6625-01-164-8371INTERCHANGEABLE
AMMETER
5945-01-245-1970INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
1977

Frequently Asked Questions

What is NSN 6680-00-798-2930?

NSN 6680-00-798-2930 is a Diaphragm Assembly,top, manufactured by Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives, classified under FSC 6680 (No Item Name Available). Status: active.

What are the part numbers for NSN 6680-00-798-2930?

NSN 6680-00-798-2930 has 3 cross-referenced part numbers: 1977-4 (Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives), 1977 (Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives), 1977-4 (Siemens Moore Process Automation).

What NSN replaces 6680-00-798-2930?

There are 12 known substitutes for 6680-00-798-2930: 3120-00-005-0464, 5340-00-073-0804, 4310-00-174-0290 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1977-4?

Key specifications for 1977-4: End Item Identification: MOORE PRODUCTS INC,LIQUID INDICATOR. 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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