PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

70-56Conduit Outlet

Efcor Inc · NSN 5975-00-903-4728 · FSC 5975 · No Item Name Available
Verified by PartsTable
NSN 5975-00-903-4728 — this item is cataloged by the U.S. Government under National Stock Number 5975-00-903-4728. Primary manufacturer part number: 70-56.
Features
  • Conduit Outlet — FSC 5975
  • Conduit Trade Size Accommodated: 0.500 INCHES ALL ENTRANCE IN
  • Surface Treatment: CADMIUM AND ZINC OVERALL
  • Cover Opening Length: 3.312 INCHES NOMINAL IN
  • Conduit Entrance Type: HUB DRILLED AND TAPPED ALL ENTRANCE
  • Conduit Type Accommodated: RIGID METALLIC THICKWALL ALL ENTRANCE
  • Material: IRON CAST UNS F12101 OVERALL
  • Style Designator: OBLONG
Applications
  • Applications requiring Iron Cast Uns F12101 Overall construction
General Description

The Conduit Outlet, cataloged under National Stock Number 5975-00-903-4728, 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 Efcor Inc. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 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
NSN5975-00-903-4728
Primary Part Number70-56
Item NameConduit Outlet
FSC / FSG5975 / 59 — No Item Name Available
ManufacturerEfcor Inc
StatusACTIVE
Conduit Trade Size Accommodated0.500 INCHES ALL ENTRANCE IN
Surface TreatmentCADMIUM AND ZINC OVERALL
Cover Opening Length3.312 INCHES NOMINAL IN
Conduit Entrance TypeHUB DRILLED AND TAPPED ALL ENTRANCE
Conduit Type AccommodatedRIGID METALLIC THICKWALL ALL ENTRANCE
MaterialIRON CAST UNS F12101 OVERALL
Style DesignatorOBLONG
Cover Opening Width1.000 INCHES NOMINAL IN
Cover Mounting Surface TypeRIDGED
Material Document and ClassificationASTM A48, CLASS 30 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Trade DesignationT SERIES
Hazardous Locations/environmental ProtectionNOT RATED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5306-00-136-99867056 INTERCHANGEABLE
Bolt,shear
Harbormaster Marine, Inc
5965-00-170-5232M-105/U INTERCHANGEABLE
Microphone,dynamic
Joint Electronics Type Designation System
5306-00-207-8567 INTERCHANGEABLE
Bolt,square Neck
5310-00-208-31467056 INTERCHANGEABLE
Nut,plain,castellated,hexagon
Brinkley Technology Group Llc Dba Hercules Manufacturing
6665-00-224-5408SCC61856 INTERCHANGEABLE
Probe,radiac
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5985-00-230-5164T50 INTERCHANGEABLE
Attenuator,variable
Yosemite Investment Inc Dba North American Capacitor Co
3020-00-252-7348ASA50-3 INTERCHANGEABLE
Chain,roller
Diamond Chain Co Div of Amsted Industries Inc
5940-00-271-4032 INTERCHANGEABLE
Terminal,stud
5315-00-274-4265225T18 INTERCHANGEABLE
Pin,straight,headless
Chief of Engineers Dept of Army
4730-00-277-9607705-6 INTERCHANGEABLE
Tee,tube
Lenz Inc Dba the Lenz Company
Cross-Reference Index
Part NumberManufacturer
70-56 Efcor Inc
T-50 Egs Electric Co Llc (USA)
T18 Crouse-Hinds Co (USA)
Related Parts
5306-00-136-9986INTERCHANGEABLE
BOLT,SHEAR
7056
5965-00-170-5232INTERCHANGEABLE
MICROPHONE,DYNAMIC
M-105/U
5306-00-207-8567INTERCHANGEABLE
BOLT,SQUARE NECK
5310-00-208-3146INTERCHANGEABLE
NUT,PLAIN,CASTELLATED,HEXAGON
7056
6665-00-224-5408INTERCHANGEABLE
PROBE,RADIAC
SCC61856
5985-00-230-5164INTERCHANGEABLE
ATTENUATOR,VARIABLE
T50
3020-00-252-7348INTERCHANGEABLE
CHAIN,ROLLER
ASA50-3
5940-00-271-4032INTERCHANGEABLE
TERMINAL,STUD
5315-00-274-4265INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
225T18
4730-00-277-9607INTERCHANGEABLE
TEE,TUBE
705-6
5355-00-438-3740INTERCHANGEABLE
KNOB
7056
5110-00-473-7298INTERCHANGEABLE
REAMER,HAND
6248330

Frequently Asked Questions

What is NSN 5975-00-903-4728?

NSN 5975-00-903-4728 is a Conduit Outlet, manufactured by Efcor Inc, classified under FSC 5975 (No Item Name Available). Status: active.

What are the part numbers for NSN 5975-00-903-4728?

NSN 5975-00-903-4728 has 3 cross-referenced part numbers: 70-56 (Efcor Inc), T-50 (Egs Electric Co Llc), T18 (Crouse-Hinds Co).

What NSN replaces 5975-00-903-4728?

There are 12 known substitutes for 5975-00-903-4728: 5306-00-136-9986, 5965-00-170-5232, 5306-00-207-8567 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 70-56?

Key specifications for 70-56: Conduit Trade Size Accommodated: 0.500 INCHES ALL ENTRANCE IN; Surface Treatment: CADMIUM AND ZINC OVERALL; Cover Opening Length: 3.312 INCHES NOMINAL IN; Conduit Entrance Type: HUB DRILLED AND TAPPED ALL ENTRANCE. 15 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com