PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AI121-4Filter Element,intake Air Cleane

Dollinger Corp · NSN 2940-00-161-0400 · FSC 2940 · No Item Name Available
Verified by PartsTable
NSN 2940-00-161-0400 — this item is cataloged by the U.S. Government under National Stock Number 2940-00-161-0400. Primary manufacturer part number: AI121-4.
Features
  • Filter Element,intake Air Cleane — FSC 2940
  • Material: PLASTIC SEAL
  • Design Type: REUSABLE
  • Body Inside Diameter: 0.812 INCHES NOMINAL IN
  • Filtration Rating in Microns: 10.0 NOMINAL
  • Body Overall Length: 3.500 INCHES NOMINAL IN
  • Body Diameter: 2.250 INCHES NOMINAL IN
  • Filtering Media Design: PLEATED SINGLE FILTERING MEDIA RESPONSE
Applications
  • Fluid filtration and purification
  • Engine intake air cleaning
  • Hydraulic system protection
  • Applications requiring Plastic Seal construction
General Description

The Filter Element,intake Air Cleane, cataloged under National Stock Number 2940-00-161-0400, is classified within Federal Supply Class 2940 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Dollinger Corp. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2940-00-161-0400
Primary Part NumberAI121-4
Item NameFilter Element,intake Air Cleane
FSC / FSG2940 / 29 — No Item Name Available
ManufacturerDollinger Corp
StatusACTIVE
MaterialPLASTIC SEAL
Design TypeREUSABLE
Body Inside Diameter0.812 INCHES NOMINAL IN
Filtration Rating in Microns10.0 NOMINAL
Body Overall Length3.500 INCHES NOMINAL IN
Body Diameter2.250 INCHES NOMINAL IN
Filtering Media DesignPLEATED SINGLE FILTERING MEDIA RESPONSE
MaterialSTEEL CORROSION RESISTING CONTAINER/CARTRIDGE
Style DesignatorCYLINDRICAL W/CLOSED ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
4810-00-004-840424125 INTERCHANGEABLE
Valve,linear,directional Control
Erie Strayer Co
5133-00-189-9283 INTERCHANGEABLE
Drill,twist
5315-00-584-955324125 INTERCHANGEABLE
Pin,grooved,headless
Moog Inc
5330-00-757-373824125 INTERCHANGEABLE
Gasket
Spirax Sarco Inc Dba Spirax Sarco
4730-01-056-36414-6FBZ-B INTERCHANGEABLE
Adapter,straight,pipe to Tube
Parker-Hannifin Corporation Div Instrumentation Products Division
4730-01-057-0545120-01833-004 INTERCHANGEABLE
Elbow,pipe to Tube
Aqua-Chem, Inc. Dba Aqua-Chem Inc
5935-01-193-7298GC860EU3 INTERCHANGEABLE
Cover,electrical Connector
Northrop Grumman Systems Corporation
6515-01-213-6011241.25 INTERCHANGEABLE
Bone Plate
Depuy Synthes Sales Inc Dba Depuy Synthes Trauma Div Depuy Synthes Sales, Inc., D/b/a Depuy Synthes Trauma
5975-01-245-7727 INTERCHANGEABLE
Box Connector,electrical
4810-01-311-8145 INTERCHANGEABLE
Body,valve
Cross-Reference Index
Part NumberManufacturer
AI121-4 Dollinger Corp (USA)
29-115HP5 Dollinger Corp (USA)
2940PL0896778 Jednolity Indeks Materialowy - Uniform Material Index (POL)
24125 Dollinger Corp (USA)
M115-5P Industrial Filter Manufacturers Inc Div Ifm Inc. (USA)
Related Parts
4810-00-004-8404INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
24125
5133-00-189-9283INTERCHANGEABLE
DRILL,TWIST
5315-00-584-9553INTERCHANGEABLE
PIN,GROOVED,HEADLESS
24125
5330-00-757-3738INTERCHANGEABLE
GASKET
24125
4730-01-056-3641INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
4-6FBZ-B
4730-01-057-0545INTERCHANGEABLE
ELBOW,PIPE TO TUBE
120-01833-004
5935-01-193-7298INTERCHANGEABLE
COVER,ELECTRICAL CONNECTOR
GC860EU3
6515-01-213-6011INTERCHANGEABLE
BONE PLATE
241.25
5975-01-245-7727INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
4810-01-311-8145INTERCHANGEABLE
BODY,VALVE
5305-01-673-6541INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
7115221618

Frequently Asked Questions

What is NSN 2940-00-161-0400?

NSN 2940-00-161-0400 is a Filter Element,intake Air Cleane, manufactured by Dollinger Corp, classified under FSC 2940 (No Item Name Available). Status: active.

What are the part numbers for NSN 2940-00-161-0400?

NSN 2940-00-161-0400 has 5 cross-referenced part numbers: AI121-4 (Dollinger Corp), 29-115HP5 (Dollinger Corp), 2940PL0896778 (Jednolity Indeks Materialowy - Uniform Material Index), 24125 (Dollinger Corp), M115-5P (Industrial Filter Manufacturers Inc Div Ifm Inc.).

What NSN replaces 2940-00-161-0400?

There are 11 known substitutes for 2940-00-161-0400: 4810-00-004-8404, 5133-00-189-9283, 5315-00-584-9553 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AI121-4?

Key specifications for AI121-4: Material: PLASTIC SEAL; Design Type: REUSABLE; Body Inside Diameter: 0.812 INCHES NOMINAL IN; Filtration Rating in Microns: 10.0 NOMINAL. 9 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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