PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

G321Compressor Unit,reciprocating

Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division · NSN 4310-00-608-1146 · FSC 4310 · No Item Name Available
Verified by PartsTable
NSN 4310-00-608-1146 — this item is cataloged by the U.S. Government under National Stock Number 4310-00-608-1146. Primary manufacturer part number: G321.
Features
  • Compressor Unit,reciprocating — FSC 4310
  • Specification/standard Data: 81349-MIL-C-13874G GOVERNMENT SPECIFICATION G
  • Stage Quantity: 2
  • Cylinder Arrangement Style: VERTICAL DESIGN
  • Control Device Type: AUTOMOTIVE SPEED REGULATOR
  • Intake Connection Quantity: 1
  • Reciprocating Compressor Design: SINGLE ACTING
  • Cylinder Quantity: 2
Applications
  • Hydraulic and pneumatic systems
  • Industrial process pumping
  • Military vehicle hydraulics
General Description

The Compressor Unit,reciprocating, cataloged under National Stock Number 4310-00-608-1146, is classified within Federal Supply Class 4310 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4310-00-608-1146
Primary Part NumberG321
Item NameCompressor Unit,reciprocating
FSC / FSG4310 / 43 — No Item Name Available
ManufacturerParker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division
StatusACTIVE
Specification/standard Data81349-MIL-C-13874G GOVERNMENT SPECIFICATION G
Stage Quantity2
Cylinder Arrangement StyleVERTICAL DESIGN
Control Device TypeAUTOMOTIVE SPEED REGULATOR
Intake Connection Quantity1
Reciprocating Compressor DesignSINGLE ACTING
Cylinder Quantity2
Duty Cycle in Percent100
Cooling System DesignSINGLE
Silencer TypeINLET
Compressor Quantity1
Prime Mover TypeGASOLINE ENGINE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
4310-00-075-5251 INTERCHANGEABLE
Compressor Unit,reciprocating
4310-00-203-0569 INTERCHANGEABLE
Compressor Unit,rotary
4310-00-508-3361376HG INTERCHANGEABLE
Compressor Unit,reciprocating
Dresser Industries Inc Leroi Div
6680-00-526-9354G321-4 INTERCHANGEABLE
No Item Name Available
Ldi Industries, Inc. Dba Ldi Industries Inc
4310-00-861-9823 INTERCHANGEABLE
Compressor Unit,reciprocating
6540-01-206-5933G-321 INTERCHANGEABLE
Light,slit,ophthalmic
Defense Medical Standardization Board
9150-01-228-3389MOLYKOTE 33 MEDIUM 3.5OZ INTERCHANGEABLE
Grease,aircraft and Instrument
Du Pont E I De Nemours and Co Inc Security Director/legal Dept
5340-01-517-9824G321 INTERCHANGEABLE
Bracket,mounting
W S Darley & Co Div Darley Pump Division
9150-01-543-6963 INTERCHANGEABLE
Grease,aircraft and Instrument
Cross-Reference Index
Part NumberManufacturer
G321 Compair Kellogg Div of Robertshaw Controls Co (USA)
MILC13874 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M1LSTD431 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MIL-C-52980 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
G321 Leroi International Inc Dba Compair Leroi (USA)
G321 PRIMARY Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division (USA)
Related Parts
4310-00-075-5251INTERCHANGEABLE
COMPRESSOR UNIT,RECIPROCATING
4310-00-203-0569INTERCHANGEABLE
COMPRESSOR UNIT,ROTARY
4310-00-508-3361INTERCHANGEABLE
COMPRESSOR UNIT,RECIPROCATING
376HG
6680-00-526-9354INTERCHANGEABLE
NO ITEM NAME AVAILABLE
G321-4
4310-00-861-9823INTERCHANGEABLE
COMPRESSOR UNIT,RECIPROCATING
6540-01-206-5933INTERCHANGEABLE
LIGHT,SLIT,OPHTHALMIC
G-321
9150-01-228-3389INTERCHANGEABLE
GREASE,AIRCRAFT AND INSTRUMENT
MOLYKOTE 33 MEDIUM 3.5OZ
5340-01-517-9824INTERCHANGEABLE
BRACKET,MOUNTING
G321
9150-01-543-6963INTERCHANGEABLE
GREASE,AIRCRAFT AND INSTRUMENT

Frequently Asked Questions

What is NSN 4310-00-608-1146?

NSN 4310-00-608-1146 is a Compressor Unit,reciprocating, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division, classified under FSC 4310 (No Item Name Available). Status: active.

What are the part numbers for NSN 4310-00-608-1146?

NSN 4310-00-608-1146 has 6 cross-referenced part numbers: G321 (Compair Kellogg Div of Robertshaw Controls Co), MILC13874 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M1LSTD431 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), MIL-C-52980 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), G321 (Leroi International Inc Dba Compair Leroi) and 1 more.

What NSN replaces 4310-00-608-1146?

There are 9 known substitutes for 4310-00-608-1146: 4310-00-075-5251, 4310-00-203-0569, 4310-00-508-3361 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of G321?

Key specifications for G321: Specification/standard Data: 81349-MIL-C-13874G GOVERNMENT SPECIFICATION G; Stage Quantity: 2; Cylinder Arrangement Style: VERTICAL DESIGN; Control Device Type: AUTOMOTIVE SPEED REGULATOR. 12 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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