NSN 5330-00-945-4451 · NIIN 009454451 · Part number 4K4376
Caterpillar Inc Div Caterpillar Defense · FSC 5330 — Packing and Gasket Materials · FSG 53 — Hardware and Abrasives · CAGE 11083
Government record, cited
NSN 5330-00-945-4451 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-945-4451. Manufacturer of record part number: 4K4376.
Also searched as5330-00-945-4451 ·
5330009454451 ·
NIIN 009454451 ·
00-945-4451 ·
FSC 5330 Packing and Gasket Materials · CAGE 11083 · 4K4376 · 451275SK9
Temp Rating: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
Seal Width: 0.438 INCHES NOMINAL IN
Sealing Element Style: ANGULAR
Housing Bore Diameter: 4.249 INCHES NOMINAL IN
Accommodated Shaft Maximum Rated Speed: 3600 FEET PER MINUTE FT
Case Style: SQUARE
Accommodated Shaft Diameter: 3.250 INCHES NOMINAL IN
Identification
NSN: 5330-00-945-4451
NIIN: 009454451
FSC: 5330 — Packing and Gasket Materials
FSG: 53 — Hardware and Abrasives
Primary part number: 4K4376
Manufacturer: Caterpillar Inc Div Caterpillar Defense
General Description
The Seal,plain Encased, cataloged under National Stock Number 5330-00-945-4451, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
5330-00-945-4451
Primary Part Number
4K4376
Item Name
Seal,plain Encased
FSC / FSG
5330 / 53 — Packing and Gasket Materials
Manufacturer
Caterpillar Inc Div Caterpillar Defense
Status
ACTIVE
Temp Rating
-65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF
Seal Width
0.438 INCHES NOMINAL IN
Sealing Element Style
ANGULAR
Housing Bore Diameter
4.249 INCHES NOMINAL IN
Accommodated Shaft Maximum Rated Speed
3600 FEET PER MINUTE FT
Case Style
SQUARE
Accommodated Shaft Diameter
3.250 INCHES NOMINAL IN
Material
RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR SEALING ELEMENT
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Other items in FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085
RETAINER
5330-00-000-0167
PARTS KIT,SEAL REPLACEMENT,MECHA
5330-00-000-5275
5330-00-000-5275 · Item name not on file
5330-00-001-1260
SEAL,NONMETALLIC SPECIAL SHAPED
5330-00-001-1833
SEAL,PLAIN ENCASED
5330-00-001-1844
GLAND,RESERVOIR,INDICATOR END
5330-00-001-1845
5330-00-001-1845 · Item name not on file
5330-00-001-1846
5330-00-001-1846 · Item name not on file
Frequently Asked Questions
What is NSN 5330-00-945-4451?
NSN 5330-00-945-4451 is a Seal,plain Encased, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5330, Packing and Gasket Materials. Status: active.
What part numbers are listed for NSN 5330-00-945-4451?
NSN 5330-00-945-4451 has 2 manufacturer part numbers on file: 4K4376 (Caterpillar Inc Div Caterpillar Defense), 451275SK9 (Federal-Mogul Corp Government Sales Dept).
What are the specifications of 4K4376?
Key specifications for 4K4376: Temp Rating: -65.0 FAHRENHEIT AND 225.0 FAHRENHEIT DEGF; Seal Width: 0.438 INCHES NOMINAL IN; Sealing Element Style: ANGULAR; Housing Bore Diameter: 4.249 INCHES NOMINAL IN. 8 specifications are documented in the U.S. Government catalog.
Is NSN 5330-00-945-4451 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.