PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

620608Cap Assembly,protective,muffler-

Trw Inc Trw Intl Trade Government Sales Dept · NSN 2990-01-261-5430 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-01-261-5430 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-261-5430. Primary manufacturer part number: 620608.
Features
  • Cap Assembly,protective,muffler- — FSC 2990
  • Pipe Outside Diameter Accommodated: 4.000 INCHES IN
  • 1 verified cross-reference
  • Primary manufacturer: Trw Inc Trw Intl Trade Government Sales Dept
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 2990-01-261-5430, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Trw Inc Trw Intl Trade Government Sales Dept. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN2990-01-261-5430
Primary Part Number620608
Item NameCap Assembly,protective,muffler-
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerTrw Inc Trw Intl Trade Government Sales Dept
StatusACTIVE
Pipe Outside Diameter Accommodated4.000 INCHES IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
4820-00-063-8911620-608 INTERCHANGEABLE
Seat,valve
Steward Machine Co Inc
3020-00-251-0865 INTERCHANGEABLE
Gear,helical
Cross-Reference Index
Part NumberManufacturer
620608 PRIMARY Trw Inc Trw Intl Trade Government Sales Dept (USA)
Related Parts
4820-00-063-8911INTERCHANGEABLE
SEAT,VALVE
620-608
3020-00-251-0865INTERCHANGEABLE
GEAR,HELICAL

Frequently Asked Questions

What is NSN 2990-01-261-5430?

NSN 2990-01-261-5430 is a Cap Assembly,protective,muffler-, manufactured by Trw Inc Trw Intl Trade Government Sales Dept, classified under FSC 2990 (No Item Name Available). Status: active.

What are the part numbers for NSN 2990-01-261-5430?

NSN 2990-01-261-5430 has 1 cross-referenced part number: 620608 (Trw Inc Trw Intl Trade Government Sales Dept).

What NSN replaces 2990-01-261-5430?

There are 2 known substitutes for 2990-01-261-5430: 4820-00-063-8911, 3020-00-251-0865. Verify interchangeability with system specifications before substitution.

What are the specifications of 620608?

Key specifications for 620608: Pipe Outside Diameter Accommodated: 4.000 INCHES IN; End Item Identification: 1980 GMC ASTRO TRACTOR. 2 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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