PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18020Seal,plain

P. W. Adamson Ltd · NSN 5330-00-566-0794 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-566-0794 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-566-0794. Primary manufacturer part number: 18020.
Features
  • Seal,plain — FSC 5330
  • Seal Width: 0.250 INCHES NOMINAL IN
  • Material: STEEL SPRING
  • Material: RUBBER SYNTHETIC SEALING ELEMENT
  • Construction: SOLID
  • Housing Bore Diameter: 1.937 INCHES NOMINAL IN
  • Cross-Sectional Shape Style: SINGLE LIP
  • Accommodated Shaft Diameter: 1.187 INCHES NOMINAL IN
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Steel Spring construction
General Description

The Seal,plain, cataloged under National Stock Number 5330-00-566-0794, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is P. W. Adamson Ltd. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 7 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
NSN5330-00-566-0794
Primary Part Number18020
Item NameSeal,plain
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerP. W. Adamson Ltd
StatusCANCELLED
Seal Width0.250 INCHES NOMINAL IN
MaterialSTEEL SPRING
MaterialRUBBER SYNTHETIC SEALING ELEMENT
ConstructionSOLID
Housing Bore Diameter1.937 INCHES NOMINAL IN
Cross-Sectional Shape StyleSINGLE LIP
Accommodated Shaft Diameter1.187 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
6620-00-167-283118020 INTERCHANGEABLE
Link
Ranco Inc Ranco Controls Div
5133-00-189-9265 INTERCHANGEABLE
Drill,twist
5905-00-552-2093 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
4330-00-689-8566SA1J003H7 INTERCHANGEABLE
Filtering Disk,fluid
Emd Millipore Corp Dba Milliporesigma Div Emd Millipore Corporation
5950-00-997-2049580R264H01 INTERCHANGEABLE
Reactor
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
5950-01-139-5940331918 INTERCHANGEABLE
Transformer
Fluke Corp
3040-01-192-426718020 INTERCHANGEABLE
Connecting Link,rigid
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
4240-01-227-4397T18020 INTERCHANGEABLE
Spectacles,industrial
North Safety Products L.l.c. Dba North Safety Products
5977-01-315-5945 INTERCHANGEABLE
Brush Set,electrical Contact
3120-01-331-9387331918 INTERCHANGEABLE
Bearing,sleeve
Brp Us Inc
Cross-Reference Index
Part NumberManufacturer
18020 P. W. Adamson Ltd (GBR)
331918 Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA)
533005660794 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
00150 Defense Logistics Agency Dba Defense Supply Center Philadelphia (USA)
E-3315PIECE104 Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA)
8675783 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
12887 LDS Johns Manville Intl (USA)
331928 Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA)
RL718/8 Zf Industrieantriebe Witten Gmbh (DEU)
9-4054-80-237 Zf Industrieantriebe Witten Gmbh (DEU)
Related Parts
6620-00-167-2831INTERCHANGEABLE
LINK
18020
5133-00-189-9265INTERCHANGEABLE
DRILL,TWIST
5905-00-552-2093INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
4330-00-689-8566INTERCHANGEABLE
FILTERING DISK,FLUID
SA1J003H7
5950-00-997-2049INTERCHANGEABLE
REACTOR
580R264H01
5950-01-139-5940INTERCHANGEABLE
TRANSFORMER
331918
3040-01-192-4267INTERCHANGEABLE
CONNECTING LINK,RIGID
18020
4240-01-227-4397INTERCHANGEABLE
SPECTACLES,INDUSTRIAL
T18020
5977-01-315-5945INTERCHANGEABLE
BRUSH SET,ELECTRICAL CONTACT
3120-01-331-9387INTERCHANGEABLE
BEARING,SLEEVE
331918
5998-01-416-7708INTERCHANGEABLE
PCB,VENTILATOR,VOLU
5330-01-565-3017INTERCHANGEABLE
GASKET
18 020

Frequently Asked Questions

What is NSN 5330-00-566-0794?

NSN 5330-00-566-0794 is a Seal,plain, manufactured by P. W. Adamson Ltd, classified under FSC 5330 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5330-00-566-0794?

NSN 5330-00-566-0794 has 10 cross-referenced part numbers: 18020 (P. W. Adamson Ltd), 331918 (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer), 533005660794 (E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales), 00150 (Defense Logistics Agency Dba Defense Supply Center Philadelphia), E-3315PIECE104 (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer) and 5 more.

What NSN replaces 5330-00-566-0794?

There are 12 known substitutes for 5330-00-566-0794: 6620-00-167-2831, 5133-00-189-9265, 5905-00-552-2093 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18020?

Key specifications for 18020: Seal Width: 0.250 INCHES NOMINAL IN; Material: STEEL SPRING; Material: RUBBER SYNTHETIC SEALING ELEMENT; Construction: SOLID. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5330-00-566-0794 still in active supply?

NSN 5330-00-566-0794 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.
PartsTable Design LLC · partstable.com