PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FB0079Cap Assembly,protective,muffler-

Mercury Products Corp · NSN 2990-01-122-0805 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-01-122-0805 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-122-0805. Primary manufacturer part number: FB0079.
Features
  • Cap Assembly,protective,muffler- — FSC 2990
  • Pipe Outside Diameter Accommodated: 0.625 INCHES IN
  • 2 verified cross-references
  • Primary manufacturer: Mercury Products Corp
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Cap Assembly,protective,muffler-, cataloged under National Stock Number 2990-01-122-0805, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Mercury Products Corp. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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
NSN2990-01-122-0805
Primary Part NumberFB0079
Item NameCap Assembly,protective,muffler-
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerMercury Products Corp
StatusACTIVE
Pipe Outside Diameter Accommodated0.625 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-274-3643554 INTERCHANGEABLE
Cock,plug
The Walworth Company
8020-00-397-2840 INTERCHANGEABLE
Brush,artist's
5999-00-504-91929702 INTERCHANGEABLE
Heater,thermal Release
General Electric Co General Purpose Control Dept Mebane Opns
5960-00-615-48579702 INTERCHANGEABLE
Shield,electron Tube
Eby Group, Llc, the Dba Eby Company Div Eby Company
5306-00-638-7812 INTERCHANGEABLE
Bolt,machine
2910-00-919-2022915914C1 INTERCHANGEABLE
Nozzle,starter Fuel
Rtx Corporation Div Pratt & Whitney
6625-01-017-3524SPR-300 PLUS INTERCHANGEABLE
Multimeter
A. W. Sperry Instruments Corp. Dba Sperry Instruments
6530-01-055-0458 INTERCHANGEABLE
Bed,adjustable
5905-01-161-7544970-2 INTERCHANGEABLE
Resistor,voltage Sensitive
Teledyne Defense Electronics, Llc Dba Teledyne Relays Div Https://www.teledyne.com/what-We-Do/
5845-01-354-76259702 INTERCHANGEABLE
Thermal Graphic Rec
Epc Laboratories Inc.
Cross-Reference Index
Part NumberManufacturer
970-2 Mercury Products Corp (USA)
FB0079 PRIMARY Mercury Products Corp (USA)
Related Parts
4820-00-274-3643INTERCHANGEABLE
COCK,PLUG
554
8020-00-397-2840INTERCHANGEABLE
BRUSH,ARTIST'S
5999-00-504-9192INTERCHANGEABLE
HEATER,THERMAL RELEASE
9702
5960-00-615-4857INTERCHANGEABLE
SHIELD,ELECTRON TUBE
9702
5306-00-638-7812INTERCHANGEABLE
BOLT,MACHINE
2910-00-919-2022INTERCHANGEABLE
NOZZLE,STARTER FUEL
915914C1
6625-01-017-3524INTERCHANGEABLE
MULTIMETER
SPR-300 PLUS
6530-01-055-0458INTERCHANGEABLE
BED,ADJUSTABLE
5905-01-161-7544INTERCHANGEABLE
RESISTOR,VOLTAGE SENSITIVE
970-2
5845-01-354-7625INTERCHANGEABLE
THERMAL GRAPHIC REC
9702
5895-01-509-9723INTERCHANGEABLE
CONVERTER,SIGNAL DATA
9702
5120-01-602-8212INTERCHANGEABLE
WRENCH SET,COMBINATION BOX AND O

Frequently Asked Questions

What is NSN 2990-01-122-0805?

NSN 2990-01-122-0805 is a Cap Assembly,protective,muffler-, manufactured by Mercury Products Corp, classified under FSC 2990 (No Item Name Available). Status: active.

What are the part numbers for NSN 2990-01-122-0805?

NSN 2990-01-122-0805 has 2 cross-referenced part numbers: 970-2 (Mercury Products Corp), FB0079 (Mercury Products Corp).

What NSN replaces 2990-01-122-0805?

There are 12 known substitutes for 2990-01-122-0805: 4820-00-274-3643, 8020-00-397-2840, 5999-00-504-9192 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FB0079?

Key specifications for FB0079: Pipe Outside Diameter Accommodated: 0.625 INCHES IN. 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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