PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1129Union,electrical Conduit

Bridgeport Fittings Inc · NSN 5975-00-280-3257 · FSC 5975 · No Item Name Available
Verified by PartsTable
NSN 5975-00-280-3257 — this item is cataloged by the U.S. Government under National Stock Number 5975-00-280-3257. Primary manufacturer part number: 1129.
Features
  • Union,electrical Conduit — FSC 5975
  • Hazardous Locations/environmental Protection: RAINTIGHT-NEMA TYPE 3R
  • Conduit Type Accommodated: RIGID METALLIC THICKWALL SECOND END
  • Item Accommodated Trade Size: 3.500 INCHES SECOND END IN
  • Item Accommodated Trade Size: 3.500 INCHES FIRST END IN
  • Surface Treatment: CADMIUM OR ZINC
  • Style Designator: STRAIGHT
  • Conduit Type Accommodated: RIGID METALLIC THICKWALL FIRST END
Applications
  • Applications requiring Iron or Steel construction
General Description

The Union,electrical Conduit, cataloged under National Stock Number 5975-00-280-3257, 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 Bridgeport Fittings Inc. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 9 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
NSN5975-00-280-3257
Primary Part Number1129
Item NameUnion,electrical Conduit
FSC / FSG5975 / 59 — No Item Name Available
ManufacturerBridgeport Fittings Inc
StatusACTIVE
Hazardous Locations/environmental ProtectionRAINTIGHT-NEMA TYPE 3R
Conduit Type AccommodatedRIGID METALLIC THICKWALL SECOND END
Item Accommodated Trade Size3.500 INCHES SECOND END IN
Item Accommodated Trade Size3.500 INCHES FIRST END IN
Surface TreatmentCADMIUM OR ZINC
Style DesignatorSTRAIGHT
Conduit Type AccommodatedRIGID METALLIC THICKWALL FIRST END
End TypeINTERNAL THREAD SECOND END
Nondefinitive Spec/std Data1 CLASS AND G KIND AND I TYPE
End TypeINTERNAL THREAD FIRST END
MaterialIRON OR STEEL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5985-00-009-4580683 INTERCHANGEABLE
Tuner,waveguide
Waveline Inc
6240-00-060-2941683 INTERCHANGEABLE
Lamp,incandescent
Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
3110-00-100-0674683 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
5905-00-155-7005 INTERCHANGEABLE
Resistor,variable,wire Wound,non
5330-00-292-0454503-9874-002 INTERCHANGEABLE
Gasket
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
2530-00-366-8397335072 INTERCHANGEABLE
Parts Kit,hydraulic Brake Master
General Motors Llc Dba General Motors Llc
4920-00-408-2982 INTERCHANGEABLE
Adapter,accelerometer
5820-00-428-392111553727 INTERCHANGEABLE
Amplifier-Modulator
Us Army Aviation and Missile Command
4920-00-473-540443-50 INTERCHANGEABLE
Regulator Assembly,absolute Pres
Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives
5120-00-473-74717082882 INTERCHANGEABLE
Inserter,seal
U S Army Tank Automotive Command Amsta-Im-Mm
Cross-Reference Index
Part NumberManufacturer
1129 Bridgeport Fittings Inc (USA)
4-350 Egs Electric Co Llc (USA)
683 Abb Installation Products Inc (USA)
173 Efcor Inc
EC-350 Egs Electrical Group Appleton Div (USA)
198 Midwest Electric Mfg Corp Sub of Crouse-Hinds Co (USA)
FEDSTD156 Federal Standards Promulgated by General Services Administration Washington DC
WC408 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
EK-409 Abb Installation Products Inc (USA)
1514 Raco, a Division of Hubbell Incorporated(delaware) (USA)
Related Parts
5985-00-009-4580INTERCHANGEABLE
TUNER,WAVEGUIDE
683
6240-00-060-2941INTERCHANGEABLE
LAMP,INCANDESCENT
683
3110-00-100-0674INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
683
5905-00-155-7005INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
5330-00-292-0454INTERCHANGEABLE
GASKET
503-9874-002
2530-00-366-8397INTERCHANGEABLE
PARTS KIT,HYDRAULIC BRAKE MASTER
335072
4920-00-408-2982INTERCHANGEABLE
ADAPTER,ACCELEROMETER
5820-00-428-3921INTERCHANGEABLE
AMPLIFIER-MODULATOR
11553727
4920-00-473-5404INTERCHANGEABLE
REGULATOR ASSEMBLY,ABSOLUTE PRES
43-50
5120-00-473-7471INTERCHANGEABLE
INSERTER,SEAL
7082882
5905-00-478-7339INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
5950-00-648-0944INTERCHANGEABLE
COIL,RADIO FREQUENCY

Frequently Asked Questions

What is NSN 5975-00-280-3257?

NSN 5975-00-280-3257 is a Union,electrical Conduit, manufactured by Bridgeport Fittings Inc, classified under FSC 5975 (No Item Name Available). Status: active.

What are the part numbers for NSN 5975-00-280-3257?

NSN 5975-00-280-3257 has 10 cross-referenced part numbers: 1129 (Bridgeport Fittings Inc), 4-350 (Egs Electric Co Llc), 683 (Abb Installation Products Inc), 173 (Efcor Inc), EC-350 (Egs Electrical Group Appleton Div) and 5 more.

What NSN replaces 5975-00-280-3257?

There are 12 known substitutes for 5975-00-280-3257: 5985-00-009-4580, 6240-00-060-2941, 3110-00-100-0674 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1129?

Key specifications for 1129: Hazardous Locations/environmental Protection: RAINTIGHT-NEMA TYPE 3R; Conduit Type Accommodated: RIGID METALLIC THICKWALL SECOND END; Item Accommodated Trade Size: 3.500 INCHES SECOND END IN; Item Accommodated Trade Size: 3.500 INCHES FIRST END IN. 11 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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