PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

203028Ring Oil Seal

Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic · NSN 2520-00-628-3001 · FSC 2520 · No Item Name Available
Verified by PartsTable
NSN 2520-00-628-3001 — this item is cataloged by the U.S. Government under National Stock Number 2520-00-628-3001. Primary manufacturer part number: 203028.
Features
  • Ring Oil Seal — FSC 2520
  • 3 verified cross-references
  • Primary manufacturer: Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The Ring Oil Seal, cataloged under National Stock Number 2520-00-628-3001, is classified within Federal Supply Class 2520 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. 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.

Catalog Facts
Item NameRing Oil Seal
FSC / FSG2520 — No Item Name Available (FSG 25)
ManufacturersSpalla Inc (CAGE 22852); U S Army Tank Automotive Command Amsta-Im-Mm (CAGE 19207); Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (CAGE 61208)
Technical Specifications
ParameterValue
NSN2520-00-628-3001
Primary Part Number203028
Item NameRing Oil Seal
FSC / FSG2520 / 25 — No Item Name Available
ManufacturerTwin Disc, Incorporated Dba Twin Disc Mid-Atlantic
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5330-00-534-016910A9941 INTERCHANGEABLE
Seal Ring,metal
Napco International Llc Dba Napco International Inc
5340-00-663-1918203028 INTERCHANGEABLE
Cap,protective,dust and Moisture
Kidde Technologies, Inc Div Kidde Aerospace and Defense
Cross-Reference Index
Part NumberManufacturer
203028 Spalla Inc (USA)
6283001 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
203028 PRIMARY Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA)
Related Parts
5330-00-534-0169INTERCHANGEABLE
SEAL RING,METAL
10A9941
5340-00-663-1918INTERCHANGEABLE
CAP,PROTECTIVE,DUST AND MOISTURE
203028

Frequently Asked Questions

What is NSN 2520-00-628-3001?

NSN 2520-00-628-3001 is a Ring Oil Seal, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 2520 (No Item Name Available). Status: active.

What are the part numbers for NSN 2520-00-628-3001?

NSN 2520-00-628-3001 has 3 cross-referenced part numbers: 203028 (Spalla Inc), 6283001 (U S Army Tank Automotive Command Amsta-Im-Mm), 203028 (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic).

What NSN replaces 2520-00-628-3001?

There are 2 known substitutes for 2520-00-628-3001: 5330-00-534-0169, 5340-00-663-1918. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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