PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

300-441Counterweight,trim

Biomarine Inc · NSN 4220-01-241-0903 · FSC 4220 · No Item Name Available
Verified by PartsTable
NSN 4220-01-241-0903 — this item is cataloged by the U.S. Government under National Stock Number 4220-01-241-0903. Primary manufacturer part number: 300-441.
Features
  • Counterweight,trim — FSC 4220
  • General Characteristics Item Description: LEAD; APPROXIMATELY 6.500 INCH LENGTH; 0.940 INCH WIDTH; 2 HOLES 0.187 INCH DIA THRU IN
  • 2 verified cross-references
  • Primary manufacturer: Biomarine Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Counterweight,trim, cataloged under National Stock Number 4220-01-241-0903, is classified within Federal Supply Class 4220 (No Item Name Available) of the Fire Fighting, Rescue, and Safety Equipment group. The primary manufacturer of record is Biomarine Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, 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
NSN4220-01-241-0903
Primary Part Number300-441
Item NameCounterweight,trim
FSC / FSG4220 / 42 — No Item Name Available
ManufacturerBiomarine Inc
StatusACTIVE
General Characteristics Item DescriptionLEAD; APPROXIMATELY 6.500 INCH LENGTH; 0.940 INCH WIDTH; 2 HOLES 0.187 INCH DIA THRU IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5945-00-553-9128 INTERCHANGEABLE
Relay,electromagnetic
5331-01-166-1712AS568-015 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
2530-01-225-5925300441PS INTERCHANGEABLE
Cylinder Assembly,actuating,line
Seats Inc Div Seats Incorporated
5962-01-287-8541 INTERCHANGEABLE
Microcircuit,digital
5330-01-486-315630044-1 INTERCHANGEABLE
Gasket
Morpac Industries, Inc Div Actuator
8465-01-616-9388300441 INTERCHANGEABLE
Pulley Single
Cmc Rescue, Inc.
6110-01-699-2804300441 INTERCHANGEABLE
Cover,distribution Box
Heil Trailer International Llc
Cross-Reference Index
Part NumberManufacturer
300-441 Mar-Vel International, Inc. Dba Mar-Vel Underwater Equip (USA)
300-441 PRIMARY Biomarine Inc (USA)
Related Parts
5945-00-553-9128INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
5331-01-166-1712INTERCHANGEABLE
O-RING
AS568-015
2530-01-225-5925INTERCHANGEABLE
CYLINDER ASSEMBLY,ACTUATING,LINE
300441PS
5962-01-287-8541INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
5330-01-486-3156INTERCHANGEABLE
GASKET
30044-1
8465-01-616-9388INTERCHANGEABLE
PULLEY SINGLE
300441
6110-01-699-2804INTERCHANGEABLE
COVER,DISTRIBUTION BOX
300441

Frequently Asked Questions

What is NSN 4220-01-241-0903?

NSN 4220-01-241-0903 is a Counterweight,trim, manufactured by Biomarine Inc, classified under FSC 4220 (No Item Name Available). Status: active.

What are the part numbers for NSN 4220-01-241-0903?

NSN 4220-01-241-0903 has 2 cross-referenced part numbers: 300-441 (Mar-Vel International, Inc. Dba Mar-Vel Underwater Equip), 300-441 (Biomarine Inc).

What NSN replaces 4220-01-241-0903?

There are 7 known substitutes for 4220-01-241-0903: 5945-00-553-9128, 5331-01-166-1712, 2530-01-225-5925 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 300-441?

Key specifications for 300-441: General Characteristics Item Description: LEAD; APPROXIMATELY 6.500 INCH LENGTH; 0.940 INCH WIDTH; 2 HOLES 0.187 INCH DIA THRU IN. 1 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com