PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

55XCap Assembly,protective,muffler-

Raincap Industrial · NSN 2990-01-593-5321 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-01-593-5321 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-593-5321. Primary manufacturer part number: 55X.
Features
  • Cap Assembly,protective,muffler- — FSC 2990
  • Pipe Outside Diameter Accommodated: 1.940 INCHES IN
  • Material: ALUMINUM ALLOY
  • 5 verified cross-references
  • Primary manufacturer: Raincap Industrial
Applications
  • Applications requiring Aluminum Alloy construction
General Description

The Cap Assembly,protective,muffler-, cataloged under National Stock Number 2990-01-593-5321, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Raincap Industrial. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 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
NSN2990-01-593-5321
Primary Part Number55X
Item NameCap Assembly,protective,muffler-
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerRaincap Industrial
StatusACTIVE
Pipe Outside Diameter Accommodated1.940 INCHES IN
MaterialALUMINUM ALLOY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
2990-01-602-02357 INTERCHANGEABLE
Cap Assembly,protective,muffler-
Raincap Industrial
2990-01-714-19268X INTERCHANGEABLE
Cap Assembly,protective,muffler-
Raincap Industrial
Cross-Reference Index
Part NumberManufacturer
55X Rain Cap Inc Dba Rain Cap Auto Trim Design (USA)
A028X828 Cummins Power Generation Inc. (USA)
04-21038 Department of Defense Project Manager-Mobile Electric Power (USA)
04-21038-3 Department of Defense Project Manager-Mobile Electric Power (USA)
55X PRIMARY Raincap Industrial (USA)
Related Parts
2990-01-602-0235INTERCHANGEABLE
CAP ASSEMBLY,PROTECTIVE,MUFFLER-
7
2990-01-714-1926INTERCHANGEABLE
CAP ASSEMBLY,PROTECTIVE,MUFFLER-
8X

Frequently Asked Questions

What is NSN 2990-01-593-5321?

NSN 2990-01-593-5321 is a Cap Assembly,protective,muffler-, manufactured by Raincap Industrial, classified under FSC 2990 (No Item Name Available). Status: active.

What are the part numbers for NSN 2990-01-593-5321?

NSN 2990-01-593-5321 has 5 cross-referenced part numbers: 55X (Rain Cap Inc Dba Rain Cap Auto Trim Design), A028X828 (Cummins Power Generation Inc.), 04-21038 (Department of Defense Project Manager-Mobile Electric Power), 04-21038-3 (Department of Defense Project Manager-Mobile Electric Power), 55X (Raincap Industrial).

What NSN replaces 2990-01-593-5321?

There are 2 known substitutes for 2990-01-593-5321: 2990-01-602-0235, 2990-01-714-1926. Verify interchangeability with system specifications before substitution.

What are the specifications of 55X?

Key specifications for 55X: End Item Identification: 6115-01-561-7455 GENERATOR SET, DIESEL ENGINE; Part Name Assigned by Controlling Agency: CAP, RAIN EXHAUST; Pipe Outside Diameter Accommodated: 1.940 INCHES IN; Material: ALUMINUM ALLOY. 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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