PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A684Fitting,lubrication

Stewart-Warner Alemite Corp · NSN 4730-00-188-6320 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-188-6320 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-188-6320. Primary manufacturer part number: A684.
Features
  • Fitting,lubrication — FSC 4730
  • Height: 1.500 INCHES NOMINAL IN
  • Screw Thread Series Designator: NPTF
  • Assembly Clearance Radius: 0.844 INCHES NOMINAL IN
  • Thread Quantity Per Inch: 27
  • Criticality Code Justification: FEAT
  • Nominal Thread Size: 0.125 INCHES IN
  • Width Across Flats: 0.438 INCHES NOMINAL IN
Applications
  • Applications requiring Copper Alloy Overall construction
General Description

The Fitting,lubrication, cataloged under National Stock Number 4730-00-188-6320, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Stewart-Warner Alemite Corp. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-188-6320
Primary Part NumberA684
Item NameFitting,lubrication
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerStewart-Warner Alemite Corp
StatusCANCELLED
Height1.500 INCHES NOMINAL IN
Screw Thread Series DesignatorNPTF
Assembly Clearance Radius0.844 INCHES NOMINAL IN
Thread Quantity Per Inch27
Criticality Code JustificationFEAT
Nominal Thread Size0.125 INCHES IN
Width Across Flats0.438 INCHES NOMINAL IN
Angle45.0 DEGREES
Surface TreatmentNICKEL OVERALL
MaterialCOPPER ALLOY OVERALL
Style DesignatorANGLE
Shank Length0.312 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
4730-00-242-2925 INTERCHANGEABLE
Fitting,lubrication
5330-00-338-5276 INTERCHANGEABLE
Gasket
4320-00-525-9254A684 INTERCHANGEABLE
Impeller,pump,centrifugal
Circor Naval Solutions Llc Dba Warren Pumps
5915-00-834-88512192246-2 INTERCHANGEABLE
Filter,radio Frequency Interfere
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
4730-00-844-8635ST7M298-2 INTERCHANGEABLE
Fitting,lubrication
The Boeing Company Div Defense
5895-01-382-1993120340 INTERCHANGEABLE
Converter,signal Data
Solar Turbines Incorporated Dba Solar Turbines Incorporated
6515-01-599-3241120340 INTERCHANGEABLE
Nail,bone
Sign Fracture Care International Dba Sign
Cross-Reference Index
Part NumberManufacturer
A684 Stewart-Warner Alemite Corp (USA)
ST7M298 The Boeing Company Div Defense (USA)
P12807 Osgood Co the (USA)
A684 Amca Intl Corp Amclyde Engineered Products Div
ST7M298-3 The Boeing Company Div Defense (USA)
120340 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
M684 Stewart-Warner Alemite Corp (USA)
120340 General Motors Corp (USA)
P7108 Bomag Usa Sub of United Dominion Industries Ltd (USA)
ST7M298-3 Stewart-Warner Alemite Corp (USA)
Related Parts
4730-00-242-2925INTERCHANGEABLE
FITTING,LUBRICATION
5330-00-338-5276INTERCHANGEABLE
GASKET
4320-00-525-9254INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
A684
5915-00-834-8851INTERCHANGEABLE
FILTER,RADIO FREQUENCY INTERFERE
2192246-2
4730-00-844-8635INTERCHANGEABLE
FITTING,LUBRICATION
ST7M298-2
5895-01-382-1993INTERCHANGEABLE
CONVERTER,SIGNAL DATA
120340
6515-01-599-3241INTERCHANGEABLE
NAIL,BONE
120340

Frequently Asked Questions

What is NSN 4730-00-188-6320?

NSN 4730-00-188-6320 is a Fitting,lubrication, manufactured by Stewart-Warner Alemite Corp, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-188-6320?

NSN 4730-00-188-6320 has 10 cross-referenced part numbers: A684 (Stewart-Warner Alemite Corp), ST7M298 (The Boeing Company Div Defense), P12807 (Osgood Co the), A684 (Amca Intl Corp Amclyde Engineered Products Div), ST7M298-3 (The Boeing Company Div Defense) and 5 more.

What NSN replaces 4730-00-188-6320?

There are 7 known substitutes for 4730-00-188-6320: 4730-00-242-2925, 5330-00-338-5276, 4320-00-525-9254 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A684?

Key specifications for A684: Height: 1.500 INCHES NOMINAL IN; Special Features: SURFACELOCATED BALL CHECK VALVE; WEAPON SYSTEM ESSENTIAL; END ITEM: F-15 EAGLE AIRCRAFT; Screw Thread Series Designator: NPTF; Assembly Clearance Radius: 0.844 INCHES NOMINAL IN. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-188-6320 still in active supply?

NSN 4730-00-188-6320 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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