PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

77042Bellows,protection

Senior Operations Llc Dba Metal Bellows Div Metal Bellows · NSN 5340-01-537-2123 · FSC 5340 · No Item Name Available
Verified by PartsTable
NSN 5340-01-537-2123 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-537-2123. Primary manufacturer part number: 77042.
Features
  • Bellows,protection — FSC 5340
  • 3 verified cross-references
  • Primary manufacturer: Senior Operations Llc Dba Metal Bellows Div Metal Bellows
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Bellows,protection, cataloged under National Stock Number 5340-01-537-2123, is classified within Federal Supply Class 5340 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Senior Operations Llc Dba Metal Bellows Div Metal Bellows. This item has 3 commercial cross-references from 3 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
NSN5340-01-537-2123
Primary Part Number77042
Item NameBellows,protection
FSC / FSG5340 / 53 — No Item Name Available
ManufacturerSenior Operations Llc Dba Metal Bellows Div Metal Bellows
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5975-00-296-16692521 INTERCHANGEABLE
Box Connector,electrical
Abb Installation Products Inc
4730-01-697-991877042 INTERCHANGEABLE
Elbow Assembly,pipe
Viega Llc
Cross-Reference Index
Part NumberManufacturer
77042 Senior Flexonics Inc (USA)
77042 PRIMARY Senior Operations Llc Dba Metal Bellows Div Metal Bellows (USA)
77042 Senior Operations Llc Div Senior Aerospace Ssp (USA)
Related Parts
5975-00-296-1669INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
2521
4730-01-697-9918INTERCHANGEABLE
ELBOW ASSEMBLY,PIPE
77042

Frequently Asked Questions

What is NSN 5340-01-537-2123?

NSN 5340-01-537-2123 is a Bellows,protection, manufactured by Senior Operations Llc Dba Metal Bellows Div Metal Bellows, classified under FSC 5340 (No Item Name Available). Status: active.

What are the part numbers for NSN 5340-01-537-2123?

NSN 5340-01-537-2123 has 3 cross-referenced part numbers: 77042 (Senior Flexonics Inc), 77042 (Senior Operations Llc Dba Metal Bellows Div Metal Bellows), 77042 (Senior Operations Llc Div Senior Aerospace Ssp).

What NSN replaces 5340-01-537-2123?

There are 2 known substitutes for 5340-01-537-2123: 5975-00-296-1669, 4730-01-697-9918. Verify interchangeability with system specifications before substitution.

What are the specifications of 77042?

Key specifications for 77042: End Item Identification: CP140 AIRCRAFT UHF COMMUNICATION SYSTEM. 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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