PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21278Seal,plain Encased

Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp. · NSN 5330-01-096-3499 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-01-096-3499 — this item is cataloged by the U.S. Government under National Stock Number 5330-01-096-3499. Primary manufacturer part number: 21278.
Features
  • Seal,plain Encased — FSC 5330
  • Accommodated Shaft Maximum Rated Speed: 2000 FEET PER MINUTE FT
  • Accommodated Shaft Diameter: 1.750 INCHES NOMINAL IN
  • Seal Width: 0.359 INCHES NOMINAL IN
  • Material: STEEL CASE
  • Housing Bore Diameter: 2.718 INCHES NOMINAL IN
  • Material Document and Classification: MIL-R-15624 MIL SPEC SINGLE MATERIAL RESPONSE SEALING ELEMENT
  • Case Style: RECESSED
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Steel Case construction
General Description

The Seal,plain Encased, cataloged under National Stock Number 5330-01-096-3499, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5330-01-096-3499
Primary Part Number21278
Item NameSeal,plain Encased
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerCrane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.
StatusACTIVE
Accommodated Shaft Maximum Rated Speed2000 FEET PER MINUTE FT
Accommodated Shaft Diameter1.750 INCHES NOMINAL IN
Seal Width0.359 INCHES NOMINAL IN
MaterialSTEEL CASE
Housing Bore Diameter2.718 INCHES NOMINAL IN
Material Document and ClassificationMIL-R-15624 MIL SPEC SINGLE MATERIAL RESPONSE SEALING ELEMENT
Case StyleRECESSED
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
Sealing Element StyleANGULAR
Temp Rating-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
1660-00-078-822710C-0005-11 INTERCHANGEABLE
Converter,liquid Oxygen
Essex Industries, Inc. Dba Essex Industries
3110-00-100-61820283 INTERCHANGEABLE
Ball,bearing
Harley Davidson Motor Co Inc
5340-00-163-5527E5-45-656 INTERCHANGEABLE
Cup,compression
Edgewood Chemical Biological Center Ecbc
5945-00-233-1389SCB42402 INTERCHANGEABLE
Relay,electromagnetic
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
6685-00-239-4007 INTERCHANGEABLE
Thermometer,self-Indicating
1075-00-293-6577 INTERCHANGEABLE
Stop,wedge,mine Sweeping
4820-00-936-4274 INTERCHANGEABLE
Valve,safety Relief
5331-01-178-1752 INTERCHANGEABLE
O-Ring
4730-01-301-368721278 INTERCHANGEABLE
Repair Kit,pipe,emergency Damage
Indumar Products Inc
1005-01-503-002221278 INTERCHANGEABLE
Bore,rod
Charles Reed Knight Jr Dba Knight's Armament Company
Cross-Reference Index
Part NumberManufacturer
21278 PRIMARY Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp. (USA)
Related Parts
1660-00-078-8227INTERCHANGEABLE
CONVERTER,LIQUID OXYGEN
10C-0005-11
3110-00-100-6182INTERCHANGEABLE
BALL,BEARING
0283
5340-00-163-5527INTERCHANGEABLE
CUP,COMPRESSION
E5-45-656
5945-00-233-1389INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
SCB42402
6685-00-239-4007INTERCHANGEABLE
THERMOMETER,SELF-INDICATING
1075-00-293-6577INTERCHANGEABLE
STOP,WEDGE,MINE SWEEPING
4820-00-936-4274INTERCHANGEABLE
VALVE,SAFETY RELIEF
5331-01-178-1752INTERCHANGEABLE
O-RING
4730-01-301-3687INTERCHANGEABLE
REPAIR KIT,PIPE,EMERGENCY DAMAGE
21278
1005-01-503-0022INTERCHANGEABLE
BORE,ROD
21278
5306-01-725-1289INTERCHANGEABLE
BOLT,MACHINE
21278

Frequently Asked Questions

What is NSN 5330-01-096-3499?

NSN 5330-01-096-3499 is a Seal,plain Encased, manufactured by Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp., classified under FSC 5330 (No Item Name Available). Status: active.

What are the part numbers for NSN 5330-01-096-3499?

NSN 5330-01-096-3499 has 1 cross-referenced part number: 21278 (Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.).

What NSN replaces 5330-01-096-3499?

There are 11 known substitutes for 5330-01-096-3499: 1660-00-078-8227, 3110-00-100-6182, 5340-00-163-5527 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21278?

Key specifications for 21278: Accommodated Shaft Maximum Rated Speed: 2000 FEET PER MINUTE FT; Accommodated Shaft Diameter: 1.750 INCHES NOMINAL IN; Seal Width: 0.359 INCHES NOMINAL IN; Material: STEEL CASE. 10 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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