PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

WA-164Reducing Washer,knockout

Abb Installation Products Inc · NSN 5975-00-280-9185 · FSC 5975 · No Item Name Available
Verified by PartsTable
NSN 5975-00-280-9185 — this item is cataloged by the U.S. Government under National Stock Number 5975-00-280-9185. Primary manufacturer part number: WA-164.
Features
  • Reducing Washer,knockout — FSC 5975
  • Design Type: FLAT
  • Material: STEEL
  • Knockout Size for Which Designed: 2.000 INCHES NOMINAL IN
  • Outside Diameter: 2.750 INCHES NOMINAL IN
  • Conduit Size Accommodated: 1.250 INCHES NOMINAL IN
  • 14 verified cross-references
  • Primary manufacturer: Abb Installation Products Inc
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 5975-00-280-9185, 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 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 14 commercial cross-references from 12 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
NSN5975-00-280-9185
Primary Part NumberWA-164
Item NameReducing Washer,knockout
FSC / FSG5975 / 59 — No Item Name Available
ManufacturerAbb Installation Products Inc
StatusACTIVE
Design TypeFLAT
MaterialSTEEL
Knockout Size for Which Designed2.000 INCHES NOMINAL IN
Outside Diameter2.750 INCHES NOMINAL IN
Conduit Size Accommodated1.250 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5999-00-033-5706 INTERCHANGEABLE
Contact,electrical
3415-00-034-4400107-4 INTERCHANGEABLE
Grinding Machine,centerless,exte
Cincinnati Machine Co
5975-00-064-86851379 INTERCHANGEABLE
Reducing Washer,knockout
Raco, a Division of Hubbell Incorporated(delaware)
6145-00-066-8640 INTERCHANGEABLE
Braid,wire
5940-00-150-46811378 INTERCHANGEABLE
Terminal,lug
Thermo Electric Company Inc. Dba Thermo Electric Company
5120-00-184-86523717 INTERCHANGEABLE
Wrench,open End
Martin Sprocket and Gear Inc
4730-00-203-9462 INTERCHANGEABLE
Coupling Assembly,quick Disconne
5340-00-217-6397 INTERCHANGEABLE
Plug,vent
9540-00-230-9882 INTERCHANGEABLE
Structural Section,special Shape
6810-00-247-0600 INTERCHANGEABLE
Mercuric Iodide,red
Cross-Reference Index
Part NumberManufacturer
RW-15 Egs Electric Co Llc (USA)
RW-200-125 Egs Electrical Group Appleton Div (USA)
13413 Atlas Technologies Inc (USA)
355 Midwest Electric Mfg Corp Sub of Crouse-Hinds Co (USA)
1074 Bridgeport Fittings Inc (USA)
RW-15 General Signal Corp O Z/gedney Co Unit (USA)
1378 Raco, a Division of Hubbell Incorporated(delaware) (USA)
WA-164 PRIMARY Abb Installation Products Inc (USA)
WA-164 Thomas and Betts Corp American Electric Div Oem Group Memphis Tn (USA)
3717 Thomas and Betts Corp (USA)
604 Efcor Inc
RW-516 Neer Mfg Co Inc (USA)
3717 PRIMARY Abb Installation Products Inc (USA)
1455-D Atlas Technologies Inc (USA)
Related Parts
5999-00-033-5706INTERCHANGEABLE
CONTACT,ELECTRICAL
3415-00-034-4400INTERCHANGEABLE
GRINDING MACHINE,CENTERLESS,EXTE
107-4
5975-00-064-8685INTERCHANGEABLE
REDUCING WASHER,KNOCKOUT
1379
6145-00-066-8640INTERCHANGEABLE
BRAID,WIRE
5940-00-150-4681INTERCHANGEABLE
TERMINAL,LUG
1378
5120-00-184-8652INTERCHANGEABLE
WRENCH,OPEN END
3717
4730-00-203-9462INTERCHANGEABLE
COUPLING ASSEMBLY,QUICK DISCONNE
5340-00-217-6397INTERCHANGEABLE
PLUG,VENT
9540-00-230-9882INTERCHANGEABLE
STRUCTURAL SECTION,SPECIAL SHAPE
6810-00-247-0600INTERCHANGEABLE
MERCURIC IODIDE,RED
4730-00-278-8873INTERCHANGEABLE
ADAPTER,STRAIGHT,TUBE TO BOSS
1074
5915-00-368-3486INTERCHANGEABLE
FILTER,LOW PASS
4013370-0701

Frequently Asked Questions

What is NSN 5975-00-280-9185?

NSN 5975-00-280-9185 is a Reducing Washer,knockout, manufactured by Abb Installation Products Inc, classified under FSC 5975 (No Item Name Available). Status: active.

What are the part numbers for NSN 5975-00-280-9185?

NSN 5975-00-280-9185 has 14 cross-referenced part numbers: RW-15 (Egs Electric Co Llc), RW-200-125 (Egs Electrical Group Appleton Div), 13413 (Atlas Technologies Inc), 355 (Midwest Electric Mfg Corp Sub of Crouse-Hinds Co), 1074 (Bridgeport Fittings Inc) and 9 more.

What NSN replaces 5975-00-280-9185?

There are 12 known substitutes for 5975-00-280-9185: 5999-00-033-5706, 3415-00-034-4400, 5975-00-064-8685 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of WA-164?

Key specifications for WA-164: Design Type: FLAT; Material: STEEL; Knockout Size for Which Designed: 2.000 INCHES NOMINAL IN; Outside Diameter: 2.750 INCHES NOMINAL IN. 5 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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