PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1851Fitting,lubrication

Stewart-Warner Corporation · NSN 4730-00-814-4581 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-814-4581 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-814-4581. Primary manufacturer part number: 1851.
Features
  • Fitting,lubrication — FSC 4730
  • Thread Class: 2A A
  • Height: 0.406 INCHES NOMINAL IN
  • Width Across Flats: 0.312 INCHES NOMINAL IN
  • Screw Thread Series Designator: UNF
  • Thread Quantity Per Inch: 28
  • Nominal Thread Size: 0.250 INCHES IN
  • Material: STEEL OVERALL
Applications
  • Applications requiring Steel Overall construction
General Description

The Fitting,lubrication, cataloged under National Stock Number 4730-00-814-4581, 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 Corporation. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-814-4581
Primary Part Number1851
Item NameFitting,lubrication
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerStewart-Warner Corporation
StatusCANCELLED
Thread Class2A A
Height0.406 INCHES NOMINAL IN
Width Across Flats0.312 INCHES NOMINAL IN
Screw Thread Series DesignatorUNF
Thread Quantity Per Inch28
Nominal Thread Size0.250 INCHES IN
MaterialSTEEL OVERALL
Style DesignatorTHREADED
Surface TreatmentZINC OVERALL
Shank Length0.281 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
4820-00-036-1730005-500-0001 INTERCHANGEABLE
Disk,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
3110-00-117-05711851 INTERCHANGEABLE
Bearing,ball,annular
Pierce Co Inc the Sub of Avis Industrial Corp
5325-00-148-55091851 INTERCHANGEABLE
Stud,lock Pin Fastener
Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor
5960-00-188-3921 INTERCHANGEABLE
Electron Tube
3455-00-241-303817531 INTERCHANGEABLE
Cutter,milling,angle
Brown & Sharpe, Inc. Div Precision Measuring Instruments, Tesa Usa
1630-00-394-1598G185-1 INTERCHANGEABLE
Ring,wheel Flinger
Goodrich Corporation Div Collins Aerospace, Landing Systems (wheels & Brakes)
6150-00-424-60851851 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Mission Systems Davenport Inc.
2520-00-495-709818-5-1 INTERCHANGEABLE
Gear
Dana Commercial Vehicle Manufacturing, Llc Dba Dana Commercial Vehicle Products
3020-00-540-44491851 INTERCHANGEABLE
Gear,spur
L3harris Technologies, Inc. Div Space and Airborne Systems
5120-00-640-6725185-1X INTERCHANGEABLE
Bit,screwdriver
Apex Tool Group, Llc
Cross-Reference Index
Part NumberManufacturer
1851 Stewart-Warner Alemite Corp (USA)
1851 PRIMARY Stewart-Warner Corporation (USA)
1851 PRIMARY Alemite, Llc Dba Skf Usa Inc. (USA)
9151329 PRIMARY Us Army Aviation and Missile Command (USA)
Related Parts
4820-00-036-1730INTERCHANGEABLE
DISK,VALVE
005-500-0001
3110-00-117-0571INTERCHANGEABLE
BEARING,BALL,ANNULAR
1851
5325-00-148-5509INTERCHANGEABLE
STUD,LOCK PIN FASTENER
1851
5960-00-188-3921INTERCHANGEABLE
ELECTRON TUBE
3455-00-241-3038INTERCHANGEABLE
CUTTER,MILLING,ANGLE
17531
1630-00-394-1598INTERCHANGEABLE
RING,WHEEL FLINGER
G185-1
6150-00-424-6085INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
1851
2520-00-495-7098INTERCHANGEABLE
GEAR
18-5-1
3020-00-540-4449INTERCHANGEABLE
GEAR,SPUR
1851
5120-00-640-6725INTERCHANGEABLE
BIT,SCREWDRIVER
185-1X
4820-00-800-6156INTERCHANGEABLE
VALVE,SAFETY RELIEF
5999-00-986-7372INTERCHANGEABLE
DELAY LINE
712810-16REVA

Frequently Asked Questions

What is NSN 4730-00-814-4581?

NSN 4730-00-814-4581 is a Fitting,lubrication, manufactured by Stewart-Warner Corporation, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-814-4581?

NSN 4730-00-814-4581 has 4 cross-referenced part numbers: 1851 (Stewart-Warner Alemite Corp), 1851 (Stewart-Warner Corporation), 1851 (Alemite, Llc Dba Skf Usa Inc.), 9151329 (Us Army Aviation and Missile Command).

What NSN replaces 4730-00-814-4581?

There are 12 known substitutes for 4730-00-814-4581: 4820-00-036-1730, 3110-00-117-0571, 5325-00-148-5509 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1851?

Key specifications for 1851: Thread Class: 2A A; Height: 0.406 INCHES NOMINAL IN; Width Across Flats: 0.312 INCHES NOMINAL IN; Screw Thread Series Designator: UNF. 11 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-814-4581 still in active supply?

NSN 4730-00-814-4581 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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