PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8521Box Connector,electrical

Abb Installation Products Inc · NSN 5975-00-878-4873 · FSC 5975 · No Item Name Available
Verified by PartsTable
NSN 5975-00-878-4873 — this item is cataloged by the U.S. Government under National Stock Number 5975-00-878-4873. Primary manufacturer part number: 8521.
Features
  • Box Connector,electrical — FSC 5975
  • Item Accommodated Trade Size: 1.500 INCHES SECOND END IN
  • Conduit Type Accommodated: RIGID METALLIC THICKWALL FIRST END
  • End Type: COMPRESSION RING AND NUT FIRST END
  • Material: IRON MALLEABLE
  • Surface Treatment: CADMIUM
  • Furnished Items: LOCKNUT AND RETAINING RING
  • End Type: FITTING/BOX CONNECTOR, RING CABLE STOP SECOND END
Applications
  • Electrical interconnection
  • Signal interface mating
  • Quick-disconnect coupling
  • Applications requiring Iron Malleable construction
General Description

The Box Connector,electrical, cataloged under National Stock Number 5975-00-878-4873, is classified within Federal Supply Class 5975 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Abb Installation Products Inc. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5975-00-878-4873
Primary Part Number8521
Item NameBox Connector,electrical
FSC / FSG5975 / 59 — No Item Name Available
ManufacturerAbb Installation Products Inc
StatusACTIVE
Item Accommodated Trade Size1.500 INCHES SECOND END IN
Conduit Type AccommodatedRIGID METALLIC THICKWALL FIRST END
End TypeCOMPRESSION RING AND NUT FIRST END
MaterialIRON MALLEABLE
Surface TreatmentCADMIUM
Furnished ItemsLOCKNUT AND RETAINING RING
End TypeFITTING/BOX CONNECTOR, RING CABLE STOP SECOND END
Hazardous Locations/environmental ProtectionCEMENT TIGHT
Item Accommodated Trade Size1.500 INCHES FIRST END IN
Style DesignatorSTRAIGHT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5935-00-061-4641357-9607-000 INTERCHANGEABLE
Connector,receptacle,electrical
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
3110-00-156-532611429 INTERCHANGEABLE
Bearing,ball,annular
Dana Off Highway Products, Llc
5310-00-176-8115AN320-12 INTERCHANGEABLE
Nut,plain,slotted,hexagon
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5985-00-188-6989581R234H02 INTERCHANGEABLE
Attenuator-Coupler
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
5120-00-242-0762 INTERCHANGEABLE
Bar,wrecking
6240-00-266-62291754 INTERCHANGEABLE
Lamp,incandescent
Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
5360-00-321-27408521 INTERCHANGEABLE
Spring,helical,compression
Cummins Inc.
5130-00-337-9125490 INTERCHANGEABLE
Holder,screwdriver Bit
Apex Tool Group, Llc
4730-00-374-69434402-12S INTERCHANGEABLE
Adapter,straight,tube to Hose
Danfoss Power Solutions II, Llc
1075-00-383-82663134722B INTERCHANGEABLE
Eccentric
Naval Ship Systems Command
Cross-Reference Index
Part NumberManufacturer
AS8384 Abb Installation Products Inc (USA)
NTC-150 Egs Electrical Group Appleton Div (USA)
31-150 Egs Electric Co Llc (USA)
HC-405 Abb Installation Products Inc (USA)
8521 PRIMARY Abb Installation Products Inc (USA)
1806 Raco, a Division of Hubbell Incorporated(delaware) (USA)
1754 Efcor Inc
Related Parts
5935-00-061-4641INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
357-9607-000
3110-00-156-5326INTERCHANGEABLE
BEARING,BALL,ANNULAR
11429
5310-00-176-8115INTERCHANGEABLE
NUT,PLAIN,SLOTTED,HEXAGON
AN320-12
5985-00-188-6989INTERCHANGEABLE
ATTENUATOR-COUPLER
581R234H02
5120-00-242-0762INTERCHANGEABLE
BAR,WRECKING
6240-00-266-6229INTERCHANGEABLE
LAMP,INCANDESCENT
1754
5360-00-321-2740INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
8521
5130-00-337-9125INTERCHANGEABLE
HOLDER,SCREWDRIVER BIT
490
4730-00-374-6943INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO HOSE
4402-12S
1075-00-383-8266INTERCHANGEABLE
ECCENTRIC
3134722B
5315-00-389-8643INTERCHANGEABLE
PIN,DISC ASSEMBLY
31150
4730-00-408-7900INTERCHANGEABLE
COUPLING,PIPE
830-012

Frequently Asked Questions

What is NSN 5975-00-878-4873?

NSN 5975-00-878-4873 is a Box Connector,electrical, manufactured by Abb Installation Products Inc, classified under FSC 5975 (No Item Name Available). Status: active.

What are the part numbers for NSN 5975-00-878-4873?

NSN 5975-00-878-4873 has 7 cross-referenced part numbers: AS8384 (Abb Installation Products Inc), NTC-150 (Egs Electrical Group Appleton Div), 31-150 (Egs Electric Co Llc), HC-405 (Abb Installation Products Inc), 8521 (Abb Installation Products Inc) and 2 more.

What NSN replaces 5975-00-878-4873?

There are 12 known substitutes for 5975-00-878-4873: 5935-00-061-4641, 3110-00-156-5326, 5310-00-176-8115 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8521?

Key specifications for 8521: Item Accommodated Trade Size: 1.500 INCHES SECOND END IN; Conduit Type Accommodated: RIGID METALLIC THICKWALL FIRST END; End Type: COMPRESSION RING AND NUT FIRST END; Material: IRON MALLEABLE. 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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