NSN 5340-01-029-4590 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-029-4590. Manufacturer of record part number: 9L7657.
Manufacturer: Caterpillar Inc Div Caterpillar Defense
General Description
The Plug,expansion, cataloged under National Stock Number 5340-01-029-4590, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
Technical Specifications
Parameter
Value
NSN
5340-01-029-4590
Primary Part Number
9L7657
Item Name
Plug,expansion
FSC / FSG
5340 / 53 — Hardware, Commercial
Manufacturer
Caterpillar Inc Div Caterpillar Defense
Status
ACTIVE
Outside Diameter
1.891 INCHES NOMINAL IN
Style Designator
CUP
Material Thickness
0.061 INCHES NOMINAL IN
Height
0.350 INCHES NOMINAL IN
Surface Treatment
PASSIVATE
Material
STEEL CORROSION RESISTING
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068
COVER,ACCESS
5340-00-000-0132
SEAT,HELICAL COMPRESSION SPRING
5340-00-000-8150
5340-00-000-8150 · Item name not on file
5340-00-001-1251
5340-00-001-1251 · Item name not on file
5340-00-001-1264
STRAP,WEBBING
5340-00-001-1265
STRAP,WEBBING
5340-00-001-1266
STRAP,WEBBING
5340-00-001-1275
HANDLE,DOOR
Frequently Asked Questions
What is NSN 5340-01-029-4590?
NSN 5340-01-029-4590 is a Plug,expansion, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5340, Hardware, Commercial. Status: active.
What part numbers are listed for NSN 5340-01-029-4590?
NSN 5340-01-029-4590 has 3 manufacturer part numbers on file: 9L7657 (Caterpillar Tractor Co Ltd), 9L7657 (Caterpillar Inc Div Caterpillar Defense), 8KP158 (Oshkosh Defense Llc).
What are the specifications of 9L7657?
Key specifications for 9L7657: Outside Diameter: 1.891 INCHES NOMINAL IN; Style Designator: CUP; Material Thickness: 0.061 INCHES NOMINAL IN; Height: 0.350 INCHES NOMINAL IN. 6 specifications are documented in the U.S. Government catalog.
Is NSN 5340-01-029-4590 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.