PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

941Reducing Washer,knockout

Efcor Inc · NSN 5975-01-118-8580 · FSC 5975 · No Item Name Available
Verified by PartsTable
NSN 5975-01-118-8580 — this item is cataloged by the U.S. Government under National Stock Number 5975-01-118-8580. Primary manufacturer part number: 941.
Features
  • Reducing Washer,knockout — FSC 5975
  • Outside Diameter: 4.125 INCHES NOMINAL IN
  • Conduit Size Accommodated: 2.500 INCHES NOMINAL IN
  • Overall Thickness: 0.050 INCHES NOMINAL IN
  • Material: STEEL
  • Design Type: FLAT
  • Knockout Size for Which Designed: 3.500 INCHES NOMINAL IN
  • 1 verified cross-reference
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel construction
General Description

The Reducing Washer,knockout, cataloged under National Stock Number 5975-01-118-8580, 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 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, 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
NSN5975-01-118-8580
Primary Part Number941
Item NameReducing Washer,knockout
FSC / FSG5975 / 59 — No Item Name Available
ManufacturerEfcor Inc
StatusACTIVE
Outside Diameter4.125 INCHES NOMINAL IN
Conduit Size Accommodated2.500 INCHES NOMINAL IN
Overall Thickness0.050 INCHES NOMINAL IN
MaterialSTEEL
Design TypeFLAT
Knockout Size for Which Designed3.500 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5305-00-011-0487110487 INTERCHANGEABLE
Screw,machine
Chrysler Realty Company Llc Dba Daimler Chrysler
3110-00-100-0712941 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
3110-00-156-3493465906 INTERCHANGEABLE
Bearing,ball,annular
Volvo Trucks North America, Inc. Dba (foreign Parent Is Volvo Lastvagnar Ab, Goteborg, Sweden.)
5325-00-182-9661SMB595933-5 INTERCHANGEABLE
Eyelet,metallic
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
4820-00-262-6876 INTERCHANGEABLE
Valve,globe
6210-00-548-0381 INTERCHANGEABLE
Fixture,lighting
5340-00-598-27521756542 INTERCHANGEABLE
Bumper
Naval Ship Systems Command
6135-00-643-1310 INTERCHANGEABLE
Battery,nonrechargeable
6210-00-854-8761 INTERCHANGEABLE
Filter,indicator Light
5996-01-061-6772941 INTERCHANGEABLE
Amplifier,video
Thomson Inc Div Grass Valley
Cross-Reference Index
Part NumberManufacturer
941 Efcor Inc
Related Parts
5305-00-011-0487INTERCHANGEABLE
SCREW,MACHINE
110487
3110-00-100-0712INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
941
3110-00-156-3493INTERCHANGEABLE
BEARING,BALL,ANNULAR
465906
5325-00-182-9661INTERCHANGEABLE
EYELET,METALLIC
SMB595933-5
4820-00-262-6876INTERCHANGEABLE
VALVE,GLOBE
6210-00-548-0381INTERCHANGEABLE
FIXTURE,LIGHTING
5340-00-598-2752INTERCHANGEABLE
BUMPER
1756542
6135-00-643-1310INTERCHANGEABLE
BATTERY,NONRECHARGEABLE
6210-00-854-8761INTERCHANGEABLE
FILTER,INDICATOR LIGHT
5996-01-061-6772INTERCHANGEABLE
AMPLIFIER,VIDEO
941
4820-01-243-1493INTERCHANGEABLE
GUIDE,VALVE STEM
5130-01-309-4402INTERCHANGEABLE
WHEEL,ABRASIVE
941

Frequently Asked Questions

What is NSN 5975-01-118-8580?

NSN 5975-01-118-8580 is a Reducing Washer,knockout, manufactured by Efcor Inc, classified under FSC 5975 (No Item Name Available). Status: active.

What are the part numbers for NSN 5975-01-118-8580?

NSN 5975-01-118-8580 has 1 cross-referenced part number: 941 (Efcor Inc).

What NSN replaces 5975-01-118-8580?

There are 12 known substitutes for 5975-01-118-8580: 5305-00-011-0487, 3110-00-100-0712, 3110-00-156-3493 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 941?

Key specifications for 941: Outside Diameter: 4.125 INCHES NOMINAL IN; Conduit Size Accommodated: 2.500 INCHES NOMINAL IN; Overall Thickness: 0.050 INCHES NOMINAL IN; Material: STEEL. 6 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