PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

30X1-2Extension,junction Box

Egs Electrical Group Appleton Div · NSN 5975-00-557-2688 · FSC 5975 · No Item Name Available
Verified by PartsTable
NSN 5975-00-557-2688 — this item is cataloged by the U.S. Government under National Stock Number 5975-00-557-2688. Primary manufacturer part number: 30X1-2.
Features
  • Extension,junction Box — FSC 5975
  • Entrance Quantity: 4
  • Material: STEEL BODY
  • Surface Treatment: CADMIUM OR ZINC OVERALL
  • Style Designator: OCTAGONAL
  • Inside Depth: 1.500 INCHES NOMINAL IN
  • Cover Mounting Hole Quantity: 2
  • Distance Across Flats: 3.500 INCHES NOMINAL IN
Applications
  • Applications requiring Steel Body construction
General Description

The Extension,junction Box, cataloged under National Stock Number 5975-00-557-2688, 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 Egs Electrical Group Appleton Div. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5975-00-557-2688
Primary Part Number30X1-2
Item NameExtension,junction Box
FSC / FSG5975 / 59 — No Item Name Available
ManufacturerEgs Electrical Group Appleton Div
StatusCANCELLED
Entrance Quantity4
MaterialSTEEL BODY
Surface TreatmentCADMIUM OR ZINC OVERALL
Style DesignatorOCTAGONAL
Inside Depth1.500 INCHES NOMINAL IN
Cover Mounting Hole Quantity2
Distance Across Flats3.500 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5310-00-021-85701883 INTERCHANGEABLE
Nut,plain,hexagon
Kentucky Mfg Co
5340-00-049-8030 INTERCHANGEABLE
Handle,recess
6610-00-086-285330E INTERCHANGEABLE
Indicator,angle
Rosemount Aerospace Inc Dba Rosemount Aerospace Inc
5975-00-100-8730 INTERCHANGEABLE
Box Connector,electrical
3110-00-108-7465290-4 INTERCHANGEABLE
Bearing,roller,needle
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
3110-00-156-1857 INTERCHANGEABLE
Bearing,ball,thrust
1005-00-523-812230E INTERCHANGEABLE
Head Ejector Rod
Colt's Manufacturing Company, Llc
5905-00-578-4518BLUL0-272J INTERCHANGEABLE
Resistor,fixed,wire Wound,induct
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
5910-00-643-6382 INTERCHANGEABLE
Capacitor,fixed,paper Dielectric
5950-00-677-083352C2174-1-1 INTERCHANGEABLE
Transformer,power
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
Cross-Reference Index
Part NumberManufacturer
128TYPE5SIZENMSTYLE35-5 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
30E Egs Electrical Group Appleton Div (USA)
30X1-2 PRIMARY Egs Electrical Group Appleton Div (USA)
102 Raco, a Division of Hubbell Incorporated(delaware) (USA)
2904 Porter H K Co Inc Electrical Div Ambridge Works (USA)
25151-1-2 PRIMARY Abb Installation Products Inc (USA)
30EXT1-2 PRIMARY Ni Industries Inc Bowers Mfg Co Div (USA)
Related Parts
5310-00-021-8570INTERCHANGEABLE
NUT,PLAIN,HEXAGON
1883
5340-00-049-8030INTERCHANGEABLE
HANDLE,RECESS
6610-00-086-2853INTERCHANGEABLE
INDICATOR,ANGLE
30E
5975-00-100-8730INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
3110-00-108-7465INTERCHANGEABLE
BEARING,ROLLER,NEEDLE
290-4
3110-00-156-1857INTERCHANGEABLE
BEARING,BALL,THRUST
1005-00-523-8122INTERCHANGEABLE
HEAD EJECTOR ROD
30E
5905-00-578-4518INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND,INDUCT
BLUL0-272J
5910-00-643-6382INTERCHANGEABLE
CAPACITOR,FIXED,PAPER DIELECTRIC
5950-00-677-0833INTERCHANGEABLE
TRANSFORMER,POWER
52C2174-1-1
5360-00-784-0330INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
13839
5985-01-052-3465INTERCHANGEABLE
ATTENUATOR,FIXED
ATT-0290-04-SMA-02

Frequently Asked Questions

What is NSN 5975-00-557-2688?

NSN 5975-00-557-2688 is a Extension,junction Box, manufactured by Egs Electrical Group Appleton Div, classified under FSC 5975 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5975-00-557-2688?

NSN 5975-00-557-2688 has 7 cross-referenced part numbers: 128TYPE5SIZENMSTYLE35-5 (Federal Specifications Promulgated by General Services Administration Washington DC), 30E (Egs Electrical Group Appleton Div), 30X1-2 (Egs Electrical Group Appleton Div), 102 (Raco, a Division of Hubbell Incorporated(delaware)), 2904 (Porter H K Co Inc Electrical Div Ambridge Works) and 2 more.

What NSN replaces 5975-00-557-2688?

There are 12 known substitutes for 5975-00-557-2688: 5310-00-021-8570, 5340-00-049-8030, 6610-00-086-2853 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 30X1-2?

Key specifications for 30X1-2: Entrance Quantity: 4; Material: STEEL BODY; Surface Treatment: CADMIUM OR ZINC OVERALL; Style Designator: OCTAGONAL. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5975-00-557-2688 still in active supply?

NSN 5975-00-557-2688 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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