PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21403Trim Tab,gearcase

Willard Marine, Inc. · NSN 2805-01-538-2861 · FSC 2805 · No Item Name Available
Verified by PartsTable
NSN 2805-01-538-2861 — this item is cataloged by the U.S. Government under National Stock Number 2805-01-538-2861. Primary manufacturer part number: 21403.
Features
  • Trim Tab,gearcase — FSC 2805
  • 1 verified cross-reference
  • Primary manufacturer: Willard Marine, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Trim Tab,gearcase, cataloged under National Stock Number 2805-01-538-2861, is classified within Federal Supply Class 2805 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Willard Marine, Inc.. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2805-01-538-2861
Primary Part Number21403
Item NameTrim Tab,gearcase
FSC / FSG2805 / 28 — No Item Name Available
ManufacturerWillard Marine, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5306-00-274-1917142419 INTERCHANGEABLE
Bolt,machine
Johnson Controls Navy Systems, Llc
5330-00-526-815721403 INTERCHANGEABLE
Gasket
Liftec Inc Div Liftec, Inc.
3040-01-198-747921403 INTERCHANGEABLE
Head,linear Actuating Cylinder
Moog Inc. Dba Ampac-Isp Corp
4820-01-200-061021403 INTERCHANGEABLE
Seat,valve
Barksdale, Inc
6240-01-313-6860F15T8-18/SPECTRUMLITE-PL/HD17M INTERCHANGEABLE
Lamp,fluorescent
Westron Corporation Dba Westron Lighting
4720-01-358-213021403 INTERCHANGEABLE
Hose,preformed
Gates Corporation
Cross-Reference Index
Part NumberManufacturer
21403 PRIMARY Willard Marine, Inc. (USA)
Related Parts
5306-00-274-1917INTERCHANGEABLE
BOLT,MACHINE
142419
5330-00-526-8157INTERCHANGEABLE
GASKET
21403
3040-01-198-7479INTERCHANGEABLE
HEAD,LINEAR ACTUATING CYLINDER
21403
4820-01-200-0610INTERCHANGEABLE
SEAT,VALVE
21403
6240-01-313-6860INTERCHANGEABLE
LAMP,FLUORESCENT
F15T8-18/SPECTRUMLITE-PL/HD17M
4720-01-358-2130INTERCHANGEABLE
HOSE,PREFORMED
21403

Frequently Asked Questions

What is NSN 2805-01-538-2861?

NSN 2805-01-538-2861 is a Trim Tab,gearcase, manufactured by Willard Marine, Inc., classified under FSC 2805 (No Item Name Available). Status: active.

What are the part numbers for NSN 2805-01-538-2861?

NSN 2805-01-538-2861 has 1 cross-referenced part number: 21403 (Willard Marine, Inc.).

What NSN replaces 2805-01-538-2861?

There are 6 known substitutes for 2805-01-538-2861: 5306-00-274-1917, 5330-00-526-8157, 3040-01-198-7479 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21403?

Key specifications for 21403: Special Features: 17IN. W X 18IN. L IN; End Item Identification: BOAT, RIGID INFLATABLE, 11 METER, 11MRB0421; Part Name Assigned by Controlling Agency: TRIM TAB. 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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