PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ST520-L-1MILCover,fluid Filter

Haywardindl. Products, Inc. · NSN 4330-01-122-4369 · FSC 4330 · No Item Name Available
Verified by PartsTable
NSN 4330-01-122-4369 — this item is cataloged by the U.S. Government under National Stock Number 4330-01-122-4369. Primary manufacturer part number: ST520-L-1MIL.
Features
  • Cover,fluid Filter — FSC 4330
  • Material: MAGNESIUM ALLOY
  • Attachment Method: CLAMP
  • Peripheral Shape Style: CIRCULAR
  • 3 verified cross-references
  • Primary manufacturer: Haywardindl. Products, Inc.
Applications
  • Fluid filtration and purification
  • Engine intake air cleaning
  • Hydraulic system protection
  • Applications requiring Magnesium Alloy construction
General Description

The Cover,fluid Filter, cataloged under National Stock Number 4330-01-122-4369, is classified within Federal Supply Class 4330 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Haywardindl. Products, Inc.. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4330-01-122-4369
Primary Part NumberST520-L-1MIL
Item NameCover,fluid Filter
FSC / FSG4330 / 43 — No Item Name Available
ManufacturerHaywardindl. Products, Inc.
StatusACTIVE
MaterialMAGNESIUM ALLOY
Attachment MethodCLAMP
Peripheral Shape StyleCIRCULAR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4730-01-440-9724ST0500600F11C INTERCHANGEABLE
Strainer,sediment
Haywardindl. Products, Inc.
Cross-Reference Index
Part NumberManufacturer
ST520-L-1MIL PRIMARY Haywardindl. Products, Inc. (USA)
ST050-0600F-11C Haywardindl. Products, Inc. (USA)
ST050-0600F-11CA REV D PIECE11 PRIMARY Haywardindl. Products, Inc. (USA)
Related Parts
4730-01-440-9724INTERCHANGEABLE
STRAINER,SEDIMENT
ST0500600F11C

Frequently Asked Questions

What is NSN 4330-01-122-4369?

NSN 4330-01-122-4369 is a Cover,fluid Filter, manufactured by Haywardindl. Products, Inc., classified under FSC 4330 (No Item Name Available). Status: active.

What are the part numbers for NSN 4330-01-122-4369?

NSN 4330-01-122-4369 has 3 cross-referenced part numbers: ST520-L-1MIL (Haywardindl. Products, Inc.), ST050-0600F-11C (Haywardindl. Products, Inc.), ST050-0600F-11CA REV D PIECE11 (Haywardindl. Products, Inc.).

What NSN replaces 4330-01-122-4369?

There is 1 known substitute for 4330-01-122-4369: 4730-01-440-9724. Verify interchangeability with system specifications before substitution.

What are the specifications of ST520-L-1MIL?

Key specifications for ST520-L-1MIL: Material: MAGNESIUM ALLOY; Attachment Method: CLAMP; Peripheral Shape Style: CIRCULAR. 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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