PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

66G342-14Packing,preformed

Westinghouse Electric Corp · NSN 5330-00-297-6257 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-297-6257 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-297-6257. Primary manufacturer part number: 66G342-14.
Features
  • Packing,preformed — FSC 5330
  • Hardness Rating: 65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL
  • Center Hole Diameter: 3.250 INCHES NOMINAL IN
  • Cross-Sectional Height: 0.125 INCHES NOMINAL IN
  • Cross-Sectional Shape Style: O-RING
  • Material Document and Classification: MIL-R-7362,TY 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
  • 23 verified cross-references
Applications
  • Applications requiring Rubber Butadiene-Acrylonitrile Class Nbr Overall construction
General Description

The Packing,preformed, cataloged under National Stock Number 5330-00-297-6257, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Westinghouse Electric Corp. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 23 commercial cross-references from 22 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5330-00-297-6257
Primary Part Number66G342-14
Item NamePacking,preformed
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerWestinghouse Electric Corp
StatusCANCELLED
Hardness Rating65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL
Center Hole Diameter3.250 INCHES NOMINAL IN
Cross-Sectional Height0.125 INCHES NOMINAL IN
Cross-Sectional Shape StyleO-RING
Material Document and ClassificationMIL-R-7362,TY 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR OVERALL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
5340-00-244-003033685 INTERCHANGEABLE
Bracket,mounting
Garrison Manufacturing Inc
6750-00-401-987484120 INTERCHANGEABLE
Mount,film Slide,photographic
Rexham Graphics Inc
4930-00-423-068545743 INTERCHANGEABLE
Cover,tank Oil Sepe
Hdt Expeditionary Systems Inc
3110-01-025-594584120 INTERCHANGEABLE
Bearing,propulsion Shaft
American Metal Bearing Co Dba Amb Engineering & Machining Solutions
2590-01-298-5461B53A-072 INTERCHANGEABLE
Control Assembly,push-Pull
Clark Brothers Instrument Co
2590-01-316-1126M45743 INTERCHANGEABLE
Control Assembly,push-Pull
Tld Wollard Llc
6220-01-364-28668555-299 INTERCHANGEABLE
Retainer,lens
Cef Industries, Llc Dba Cef Industries Inc
5330-01-415-797833685 INTERCHANGEABLE
Gasket
Bird Products Corp
5331-01-606-5308841201 INTERCHANGEABLE
O-Ring
Reuland Electric Co
5365-01-723-483584120 INTERCHANGEABLE
Shim
Precision Steel Warehouse Inc Precision Brand Products Div
Cross-Reference Index
Part NumberManufacturer
7D84120 Fwd Seagrave Holdings Lp (USA)
9045743 Euclid Inc (USA)
84120 Eaton Aerospace, Llc Dba Jackson South (USA)
84120 Wilson Trailer Co (USA)
45743 General Motors Corp (USA)
855515 Clark Material Handling Company (USA)
855515 Clark Equipment Co (USA)
84120 Walter Motor Truck Co (USA)
84120 Manitowoc Engineering Co Division of the Manitowoc Co Inc (USA)
33685 Allianz Sweeper Company (USA)
4225M Diamond Reo Truck Co (USA)
84120 Mack Trucks, Inc. Dba Macungie Operations Div Lehigh Valley Operations (USA)
84120 Available Truck Co (USA)
4449P11 Taylor Machine Works Inc (USA)
66G342-14 Colt Industries Operating Corp Pratt and Whitney Machine Tool Div
218K326 Hyster-Yale Group, Inc. Dba Yale Materials Handling (USA)
66G342-14 PRIMARY Westinghouse Electric Corp (USA)
84120 Sicard a Division of Smi-Snowblast Inc Dba Sicard (USA)
84120 Komatsu America Corporation (USA)
84120 Scott Huber Essick a Co of Figgie International Inc (USA)
Related Parts
5340-00-244-0030INTERCHANGEABLE
BRACKET,MOUNTING
33685
6750-00-401-9874INTERCHANGEABLE
MOUNT,FILM SLIDE,PHOTOGRAPHIC
84120
4930-00-423-0685INTERCHANGEABLE
COVER,TANK OIL SEPE
45743
3110-01-025-5945INTERCHANGEABLE
BEARING,PROPULSION SHAFT
84120
2590-01-298-5461INTERCHANGEABLE
CONTROL ASSEMBLY,PUSH-PULL
B53A-072
2590-01-316-1126INTERCHANGEABLE
CONTROL ASSEMBLY,PUSH-PULL
M45743
6220-01-364-2866INTERCHANGEABLE
RETAINER,LENS
8555-299
5330-01-415-7978INTERCHANGEABLE
GASKET
33685
5331-01-606-5308INTERCHANGEABLE
O-RING
841201
5365-01-723-4835INTERCHANGEABLE
SHIM
84120

Frequently Asked Questions

What is NSN 5330-00-297-6257?

NSN 5330-00-297-6257 is a Packing,preformed, manufactured by Westinghouse Electric Corp, classified under FSC 5330 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5330-00-297-6257?

NSN 5330-00-297-6257 has 23 cross-referenced part numbers: 7D84120 (Fwd Seagrave Holdings Lp), 9045743 (Euclid Inc), 84120 (Eaton Aerospace, Llc Dba Jackson South), 84120 (Wilson Trailer Co), 45743 (General Motors Corp) and 18 more.

What NSN replaces 5330-00-297-6257?

There are 10 known substitutes for 5330-00-297-6257: 5340-00-244-0030, 6750-00-401-9874, 4930-00-423-0685 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 66G342-14?

Key specifications for 66G342-14: Hardness Rating: 65.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM OVERALL; Center Hole Diameter: 3.250 INCHES NOMINAL IN; Cross-Sectional Height: 0.125 INCHES NOMINAL IN; Cross-Sectional Shape Style: O-RING. 6 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5330-00-297-6257 still in active supply?

NSN 5330-00-297-6257 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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