PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18Z255D12Seal,plain

Morris Material Handling, Inc. · NSN 5330-00-443-1999 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-443-1999 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-443-1999. Primary manufacturer part number: 18Z255D12.
Features
  • Seal,plain — FSC 5330
  • Housing Bore Diameter: 4.875 INCHES NOMINAL IN
  • Construction: SOLID
  • Material: RUBBER SYNTHETIC SEALING ELEMENT
  • Material: STEEL SPRING
  • Temp Rating: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
  • Accommodated Shaft Diameter: 3.875 INCHES NOMINAL IN
  • Seal Width: 4.875 INCHES MINIMUM AND 4.877 INCHES MAXIMUM IN
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Synthetic Sealing Element construction
General Description

The Seal,plain, cataloged under National Stock Number 5330-00-443-1999, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Morris Material Handling, Inc.. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, 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
NSN5330-00-443-1999
Primary Part Number18Z255D12
Item NameSeal,plain
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerMorris Material Handling, Inc.
StatusACTIVE
Housing Bore Diameter4.875 INCHES NOMINAL IN
ConstructionSOLID
MaterialRUBBER SYNTHETIC SEALING ELEMENT
MaterialSTEEL SPRING
Temp Rating-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
Accommodated Shaft Diameter3.875 INCHES NOMINAL IN
Seal Width4.875 INCHES MINIMUM AND 4.877 INCHES MAXIMUM IN
Cross-Sectional Shape StyleDUAL LIP
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5950-00-113-439852005 INTERCHANGEABLE
Reactor
Magnetika Inc Div Magnetika/phillipsburg Location
Cross-Reference Index
Part NumberManufacturer
18Z2555D12 Morris Material Handling, Inc. (USA)
18Z255D12 PRIMARY Morris Material Handling, Inc. (USA)
415185 Hutchinson Seal Corporation (USA)
18Z715015 Morris Material Handling, Inc. (USA)
Related Parts
5950-00-113-4398INTERCHANGEABLE
REACTOR
52005

Frequently Asked Questions

What is NSN 5330-00-443-1999?

NSN 5330-00-443-1999 is a Seal,plain, manufactured by Morris Material Handling, Inc., classified under FSC 5330 (No Item Name Available). Status: active.

What are the part numbers for NSN 5330-00-443-1999?

NSN 5330-00-443-1999 has 4 cross-referenced part numbers: 18Z2555D12 (Morris Material Handling, Inc.), 18Z255D12 (Morris Material Handling, Inc.), 415185 (Hutchinson Seal Corporation), 18Z715015 (Morris Material Handling, Inc.).

What NSN replaces 5330-00-443-1999?

There is 1 known substitute for 5330-00-443-1999: 5950-00-113-4398. Verify interchangeability with system specifications before substitution.

What are the specifications of 18Z255D12?

Key specifications for 18Z255D12: Housing Bore Diameter: 4.875 INCHES NOMINAL IN; Construction: SOLID; Material: RUBBER SYNTHETIC SEALING ELEMENT; Material: STEEL SPRING. 8 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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