PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

DR4Ring Set,piston

Wisconsin Motors, Llc · NSN 2805-00-422-9321 · FSC 2805 · No Item Name Available
Verified by PartsTable
NSN 2805-00-422-9321 — this item is cataloged by the U.S. Government under National Stock Number 2805-00-422-9321. Primary manufacturer part number: DR4.
Features
  • Ring Set,piston — FSC 2805
  • Standard Bore Diameter: 2.875 INCHES IN
  • Piston Accommodation Quantity: 1
  • Ring Set Component Parts: COMPRESSION RING,DC161,66289,2,OIL RING,DC162,66289,2,SCRAPER RING,DC161-1,66289,1
  • 5 verified cross-references
  • Primary manufacturer: Wisconsin Motors, Llc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ring Set,piston, cataloged under National Stock Number 2805-00-422-9321, is classified within Federal Supply Class 2805 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Wisconsin Motors, Llc. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, 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
NSN2805-00-422-9321
Primary Part NumberDR4
Item NameRing Set,piston
FSC / FSG2805 / 28 — No Item Name Available
ManufacturerWisconsin Motors, Llc
StatusACTIVE
Standard Bore Diameter2.875 INCHES IN
Piston Accommodation Quantity1
Ring Set Component PartsCOMPRESSION RING,DC161,66289,2,OIL RING,DC162,66289,2,SCRAPER RING,DC161-1,66289,1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
9540-00-043-3508 INTERCHANGEABLE
Angle,structural
3110-00-144-8983177002-73 INTERCHANGEABLE
Bearing,ball,annular
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5950-00-229-83072004343-0201 INTERCHANGEABLE
Transformer,pulse
Sypris Electronics, Llc Dba Sypris Electronics Llc
4710-00-248-43111-20A C INTERCHANGEABLE
Tube Assembly,metal
Brass Craft Mfg Co Sub of Masco Corp
8130-00-253-0105 INTERCHANGEABLE
Reel,cable
2920-00-255-4182 INTERCHANGEABLE
Rotor,ignition Distributor
2610-00-269-7346 INTERCHANGEABLE
Inner Tube,pneumatic Tire,vehicu
7810-00-271-17547810-00-271-1754 INTERCHANGEABLE
Softball Set,women's
General Services Administration Federal Supply Service
5120-00-293-2235 INTERCHANGEABLE
Key,socket Head Screw
4730-00-297-0032DR4-6 INTERCHANGEABLE
Restrictor,fluid Flow
Del Aerospace Inc Dba Del Aerospace Inc
Cross-Reference Index
Part NumberManufacturer
DR4 PRIMARY Wisconsin Motors, Llc (USA)
13S41 Spirolox Inc (USA)
7035 Spx Corp (USA)
7035 Bosch Automotive Service Solutions Inc. (USA)
70020 Dana Corp Engine Products Div (USA)
Related Parts
9540-00-043-3508INTERCHANGEABLE
ANGLE,STRUCTURAL
3110-00-144-8983INTERCHANGEABLE
BEARING,BALL,ANNULAR
177002-73
5950-00-229-8307INTERCHANGEABLE
TRANSFORMER,PULSE
2004343-0201
4710-00-248-4311INTERCHANGEABLE
TUBE ASSEMBLY,METAL
1-20A C
8130-00-253-0105INTERCHANGEABLE
REEL,CABLE
2920-00-255-4182INTERCHANGEABLE
ROTOR,IGNITION DISTRIBUTOR
2610-00-269-7346INTERCHANGEABLE
INNER TUBE,PNEUMATIC TIRE,VEHICU
7810-00-271-1754INTERCHANGEABLE
SOFTBALL SET,WOMEN'S
7810-00-271-1754
5120-00-293-2235INTERCHANGEABLE
KEY,SOCKET HEAD SCREW
4730-00-297-0032INTERCHANGEABLE
RESTRICTOR,FLUID FLOW
DR4-6
6150-00-374-9585INTERCHANGEABLE
LEAD,ELECTRICAL
1037
2640-00-451-8088INTERCHANGEABLE
FLAP,INNER TUBE,PNEUMATIC TIRE
301SB410

Frequently Asked Questions

What is NSN 2805-00-422-9321?

NSN 2805-00-422-9321 is a Ring Set,piston, manufactured by Wisconsin Motors, Llc, classified under FSC 2805 (No Item Name Available). Status: active.

What are the part numbers for NSN 2805-00-422-9321?

NSN 2805-00-422-9321 has 5 cross-referenced part numbers: DR4 (Wisconsin Motors, Llc), 13S41 (Spirolox Inc), 7035 (Spx Corp), 7035 (Bosch Automotive Service Solutions Inc.), 70020 (Dana Corp Engine Products Div).

What NSN replaces 2805-00-422-9321?

There are 12 known substitutes for 2805-00-422-9321: 9540-00-043-3508, 3110-00-144-8983, 5950-00-229-8307 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of DR4?

Key specifications for DR4: Standard Bore Diameter: 2.875 INCHES IN; Piston Accommodation Quantity: 1; Ring Set Component Parts: COMPRESSION RING,DC161,66289,2,OIL RING,DC162,66289,2,SCRAPER RING,DC161-1,66289,1. 3 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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