PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21158-18 28Seal,plain Encased

Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc · NSN 5330-00-531-2609 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-531-2609 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-531-2609. Primary manufacturer part number: 21158-18 28.
Features
  • Seal,plain Encased — FSC 5330
  • Sealing Element Style: ANGULAR
  • Maximum Pressure Rating: 7.0 POUNDS PER SQUARE INCH (PSI) LBS
  • Case Style: SQUARE
  • Color: BLACK
  • Material: RUBBER SYNTHETIC SEALING ELEMENT
  • Accommodated Shaft Maximum Rated Speed: 3000 FEET PER MINUTE FT
  • Material: STEEL CASE
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Synthetic Sealing Element construction
General Description

The Seal,plain Encased, cataloged under National Stock Number 5330-00-531-2609, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5330-00-531-2609
Primary Part Number21158-18 28
Item NameSeal,plain Encased
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerGarlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc
StatusCANCELLED
Sealing Element StyleANGULAR
Maximum Pressure Rating7.0 POUNDS PER SQUARE INCH (PSI) LBS
Case StyleSQUARE
ColorBLACK
MaterialRUBBER SYNTHETIC SEALING ELEMENT
Accommodated Shaft Maximum Rated Speed3000 FEET PER MINUTE FT
MaterialSTEEL CASE
Hardness Rating80.0 SHORE DUROMETER A NOMINAL OVERALL
Accommodated Shaft Diameter2.500 INCHES NOMINAL IN
Housing Bore Diameter3.751 INCHES NOMINAL IN
Seal Width0.375 INCHES NOMINAL IN
Temp Rating-40.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5950-00-066-0927 INTERCHANGEABLE
Transformer,radio Frequency
2940-00-075-016174995265 INTERCHANGEABLE
Filter Element,fluid
Kalmar AC Inc
6240-00-299-61261828 INTERCHANGEABLE
Lamp,incandescent
Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
4310-00-360-40761828 INTERCHANGEABLE
Intercooler,compressor
Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor
5975-00-660-5809 INTERCHANGEABLE
Coupling,electrical Conduit
6530-00-689-36711828 INTERCHANGEABLE
Headrest,surgical,cerebellar
Steris Corporation Dba Steris Applied Sterilization Technololgies
5910-00-798-575418-28 INTERCHANGEABLE
Capacitor,fixed,electrolytic
Keysight Technologies Inc
4820-00-956-17351828 INTERCHANGEABLE
Diaphragm,valve,flat
Rockwell International Corp Flow Control Div
4730-01-048-98971828 INTERCHANGEABLE
Locknut,pipe
R.w. Fernstrum & Company
5310-01-054-1659BACN10JD108 INTERCHANGEABLE
Nut,plain,slotted,hexagon
The Boeing Company Div Defense
Cross-Reference Index
Part NumberManufacturer
63X1828 Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc (USA)
21158-18 28 PRIMARY Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc (USA)
3798-324 Landoll Corporation Dba Landoll Corporation Drexel Division Div Drexel (USA)
1828 Tld Wollard Llc (USA)
Related Parts
5950-00-066-0927INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
2940-00-075-0161INTERCHANGEABLE
FILTER ELEMENT,FLUID
74995265
6240-00-299-6126INTERCHANGEABLE
LAMP,INCANDESCENT
1828
4310-00-360-4076INTERCHANGEABLE
INTERCOOLER,COMPRESSOR
1828
5975-00-660-5809INTERCHANGEABLE
COUPLING,ELECTRICAL CONDUIT
6530-00-689-3671INTERCHANGEABLE
HEADREST,SURGICAL,CEREBELLAR
1828
5910-00-798-5754INTERCHANGEABLE
CAPACITOR,FIXED,ELECTROLYTIC
18-28
4820-00-956-1735INTERCHANGEABLE
DIAPHRAGM,VALVE,FLAT
1828
4730-01-048-9897INTERCHANGEABLE
LOCKNUT,PIPE
1828
5310-01-054-1659INTERCHANGEABLE
NUT,PLAIN,SLOTTED,HEXAGON
BACN10JD108
5360-01-054-2281INTERCHANGEABLE
SPRING
12356018
5305-01-078-7914INTERCHANGEABLE
SCREW,LOCK
1828

Frequently Asked Questions

What is NSN 5330-00-531-2609?

NSN 5330-00-531-2609 is a Seal,plain Encased, manufactured by Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc, classified under FSC 5330 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5330-00-531-2609?

NSN 5330-00-531-2609 has 4 cross-referenced part numbers: 63X1828 (Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc), 21158-18 28 (Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc), 3798-324 (Landoll Corporation Dba Landoll Corporation Drexel Division Div Drexel), 1828 (Tld Wollard Llc).

What NSN replaces 5330-00-531-2609?

There are 12 known substitutes for 5330-00-531-2609: 5950-00-066-0927, 2940-00-075-0161, 6240-00-299-6126 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21158-18 28?

Key specifications for 21158-18 28: Sealing Element Style: ANGULAR; Maximum Pressure Rating: 7.0 POUNDS PER SQUARE INCH (PSI) LBS; Case Style: SQUARE; Color: BLACK. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5330-00-531-2609 still in active supply?

NSN 5330-00-531-2609 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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