PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

16440Seal,plain Encased

Harbormaster Marine, Inc · NSN 5330-00-291-7740 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-291-7740 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-291-7740. Primary manufacturer part number: 16440.
Features
  • Seal,plain Encased — FSC 5330
  • Accommodated Shaft Maximum Rated Speed: 1000 FEET PER MINUTE FT
  • Accommodated Shaft Diameter: 11.812 INCHES NOMINAL IN
  • Housing Bore Diameter: 14.000 INCHES NOMINAL IN
  • Material: RUBBER SYNTHETIC SEALING ELEMENT
  • Material: STEEL CASE
  • Case Style: SQUARE
  • Seal Width: 1.000 INCHES NOMINAL IN
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 5330-00-291-7740, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Harbormaster Marine, Inc. Government technical data includes 8 verified specifications, 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5330-00-291-7740
Primary Part Number16440
Item NameSeal,plain Encased
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerHarbormaster Marine, Inc
StatusCANCELLED
Accommodated Shaft Maximum Rated Speed1000 FEET PER MINUTE FT
Accommodated Shaft Diameter11.812 INCHES NOMINAL IN
Housing Bore Diameter14.000 INCHES NOMINAL IN
MaterialRUBBER SYNTHETIC SEALING ELEMENT
MaterialSTEEL CASE
Case StyleSQUARE
Seal Width1.000 INCHES NOMINAL IN
Sealing Element StyleANGULAR
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
4820-00-036-185916440 INTERCHANGEABLE
Stem,fluid Valve
Ashcroft Inc Dba Heise
3820-00-116-326310010 INTERCHANGEABLE
Yoke
Ramsey Winch Co
5310-00-185-6464 INTERCHANGEABLE
Nut,plain,round
4730-00-196-15032567HX INTERCHANGEABLE
Nipple,pipe
Oshkosh Defense Llc
5905-00-723-45521816387-2 INTERCHANGEABLE
Resistor,variable,wire Wound,pre
Honeywell Intl Inc Defense Avionics Systems
2910-00-897-246116440 INTERCHANGEABLE
Stop,delivery Valve
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
5305-00-925-4771MS35275-211 INTERCHANGEABLE
Screw,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5330-01-147-407016-440 INTERCHANGEABLE
Gasket
Rix Industries
3110-01-172-87777-113-100061 INTERCHANGEABLE
Bearing,roller,cylindrical
Mpb Corporation Dba Mpb Corp
5330-01-272-262513978 INTERCHANGEABLE
Seal,nonmetallic Angle
Sullair Corp
Cross-Reference Index
Part NumberManufacturer
13978 Zf Industrieantriebe Witten Gmbh (DEU)
16440 PRIMARY Harbormaster Marine, Inc (USA)
Related Parts
4820-00-036-1859INTERCHANGEABLE
STEM,FLUID VALVE
16440
3820-00-116-3263INTERCHANGEABLE
YOKE
10010
5310-00-185-6464INTERCHANGEABLE
NUT,PLAIN,ROUND
4730-00-196-1503INTERCHANGEABLE
NIPPLE,PIPE
2567HX
5905-00-723-4552INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,PRE
1816387-2
2910-00-897-2461INTERCHANGEABLE
STOP,DELIVERY VALVE
16440
5305-00-925-4771INTERCHANGEABLE
SCREW,MACHINE
MS35275-211
5330-01-147-4070INTERCHANGEABLE
GASKET
16-440
3110-01-172-8777INTERCHANGEABLE
BEARING,ROLLER,CYLINDRICAL
7-113-100061
5330-01-272-2625INTERCHANGEABLE
SEAL,NONMETALLIC ANGLE
13978
5305-01-273-8315INTERCHANGEABLE
SCREW,CAP,SOCKET HEAD
16440
5905-01-479-4861INTERCHANGEABLE
RESISTOR,FIXED,COMPOSITION

Frequently Asked Questions

What is NSN 5330-00-291-7740?

NSN 5330-00-291-7740 is a Seal,plain Encased, manufactured by Harbormaster Marine, Inc, classified under FSC 5330 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5330-00-291-7740?

NSN 5330-00-291-7740 has 2 cross-referenced part numbers: 13978 (Zf Industrieantriebe Witten Gmbh), 16440 (Harbormaster Marine, Inc).

What NSN replaces 5330-00-291-7740?

There are 12 known substitutes for 5330-00-291-7740: 4820-00-036-1859, 3820-00-116-3263, 5310-00-185-6464 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 16440?

Key specifications for 16440: Accommodated Shaft Maximum Rated Speed: 1000 FEET PER MINUTE FT; Accommodated Shaft Diameter: 11.812 INCHES NOMINAL IN; Housing Bore Diameter: 14.000 INCHES NOMINAL IN; Material: RUBBER SYNTHETIC SEALING ELEMENT. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5330-00-291-7740 still in active supply?

NSN 5330-00-291-7740 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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