PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21470Drain,automatic,boat

Willard Marine, Inc. · NSN 2040-01-538-2820 · FSC 2040 · No Item Name Available
Verified by PartsTable
NSN 2040-01-538-2820 — this item is cataloged by the U.S. Government under National Stock Number 2040-01-538-2820. Primary manufacturer part number: 21470.
Features
  • Drain,automatic,boat — FSC 2040
  • 2 verified cross-references
  • Primary manufacturer: Willard Marine, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Drain,automatic,boat, cataloged under National Stock Number 2040-01-538-2820, is classified within Federal Supply Class 2040 (No Item Name Available) of the Ship and Marine Equipment group. The primary manufacturer of record is Willard Marine, Inc.. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2040-01-538-2820
Primary Part Number21470
Item NameDrain,automatic,boat
FSC / FSG2040 / 20 — No Item Name Available
ManufacturerWillard Marine, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5307-00-275-3743 INTERCHANGEABLE
Stud,plain
4730-00-278-4328 INTERCHANGEABLE
Adapter,straight,pipe to Tube
5999-00-417-904421-470 INTERCHANGEABLE
Contact,electrical
Eaton Corp Opns & Technical Center
3110-01-417-974221470 INTERCHANGEABLE
Bearing,roller,radial and Thrust
Parker Hannifin Corporation Div Hydraulic Systems Division
4235-01-423-278721470 INTERCHANGEABLE
Boom,spill Containment,hazardous
Waste Solutions Corp
5110-01-434-9636 INTERCHANGEABLE
Handle,file
4720-01-442-345721470 INTERCHANGEABLE
Hose,preformed
Gates Corporation
Cross-Reference Index
Part NumberManufacturer
21470 PRIMARY Willard Marine, Inc. (USA)
21470E Willard Marine, Inc. (USA)
Related Parts
5307-00-275-3743INTERCHANGEABLE
STUD,PLAIN
4730-00-278-4328INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
5999-00-417-9044INTERCHANGEABLE
CONTACT,ELECTRICAL
21-470
3110-01-417-9742INTERCHANGEABLE
BEARING,ROLLER,RADIAL AND THRUST
21470
4235-01-423-2787INTERCHANGEABLE
BOOM,SPILL CONTAINMENT,HAZARDOUS
21470
5110-01-434-9636INTERCHANGEABLE
HANDLE,FILE
4720-01-442-3457INTERCHANGEABLE
HOSE,PREFORMED
21470

Frequently Asked Questions

What is NSN 2040-01-538-2820?

NSN 2040-01-538-2820 is a Drain,automatic,boat, manufactured by Willard Marine, Inc., classified under FSC 2040 (No Item Name Available). Status: active.

What are the part numbers for NSN 2040-01-538-2820?

NSN 2040-01-538-2820 has 2 cross-referenced part numbers: 21470 (Willard Marine, Inc.), 21470E (Willard Marine, Inc.).

What NSN replaces 2040-01-538-2820?

There are 7 known substitutes for 2040-01-538-2820: 5307-00-275-3743, 4730-00-278-4328, 5999-00-417-9044 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21470?

Key specifications for 21470: End Item Identification: BOAT, RIGID INFLATABLE, 11 METER, 11MRB0421; Part Name Assigned by Controlling Agency: BILGE DRAIN PLUG; Special Features: 3/4IN. NPT IN. 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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