NSN 5340-01-557-1681 — this item is cataloged by the U.S. Government under National Stock Number 5340-01-557-1681. Manufacturer of record part number: EX-A2X.
Nearby stock numbers← 5340-01-557-1599 Rail with Fan
·
5340-01-557-1728 Bracket, Mounting →
Features
Plug,expansion — FSC 5340
2 manufacturer part numbers on file
Manufacturer of record: Unitronics Inc
Identification
NSN: 5340-01-557-1681
NIIN: 015571681
FSC: 5340 — Hardware, Commercial
FSG: 53 — Hardware and Abrasives
Primary part number: EX-A2X
Manufacturer: Unitronics Inc
General Description
The Plug,expansion, cataloged under National Stock Number 5340-01-557-1681, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Unitronics Inc. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
Technical Specifications
Parameter
Value
NSN
5340-01-557-1681
Primary Part Number
EX-A2X
Item Name
Plug,expansion
FSC / FSG
5340 / 53 — Hardware, Commercial
Manufacturer
Unitronics Inc
Status
ACTIVE
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 5340-01-557-1681?
NSN 5340-01-557-1681 is a Plug,expansion, manufactured by Unitronics Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
What part numbers are listed for NSN 5340-01-557-1681?
NSN 5340-01-557-1681 has 2 manufacturer part numbers on file: EX-A2X (Colterlec Pty Ltd), EX-A2X (Unitronics Inc).
What are the specifications of EX-A2X?
Key specifications for EX-A2X: Special Features: UP TO 8 I O MODULES CAN BE CONNECTED TO A SINGLE ADAPTER, 12VDC OR 24 VDC VDC; End Item Identification: PROGRAMMABLE LOGIC CONTROLLER. 0 specifications are documented in the U.S. Government catalog.
Is NSN 5340-01-557-1681 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.