PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1080Reducing Washer,knockout

Bridgeport Fittings Inc · NSN 5975-00-280-9183 · FSC 5975 · No Item Name Available
Verified by PartsTable
NSN 5975-00-280-9183 — this item is cataloged by the U.S. Government under National Stock Number 5975-00-280-9183. Primary manufacturer part number: 1080.
Features
  • Reducing Washer,knockout — FSC 5975
  • Material: STEEL
  • Design Type: FLAT
  • Conduit Size Accommodated: 1.500 INCHES NOMINAL IN
  • Knockout Size for Which Designed: 2.500 INCHES NOMINAL IN
  • 8 verified cross-references
  • Primary manufacturer: Bridgeport Fittings 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 5975-00-280-9183, 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 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5975-00-280-9183
Primary Part Number1080
Item NameReducing Washer,knockout
FSC / FSG5975 / 59 — No Item Name Available
ManufacturerBridgeport Fittings Inc
StatusACTIVE
MaterialSTEEL
Design TypeFLAT
Conduit Size Accommodated1.500 INCHES NOMINAL IN
Knockout Size for Which Designed2.500 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
1680-00-099-504713419 INTERCHANGEABLE
Spindle,valve
Mission Systems Wimborne Limited Div Cobham Mission Systems Wimborne Ltd
5330-00-136-7211 INTERCHANGEABLE
Seal,plain Encased
5975-00-265-7776 INTERCHANGEABLE
Reducing Washer,knockout
1650-00-474-172013419 INTERCHANGEABLE
Disk,valve
Hydro-Aire Aerospace Corp
5930-00-717-61454254961 INTERCHANGEABLE
Switch Assembly
The Boeing Company
5365-00-785-288613419 INTERCHANGEABLE
Shim
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
5998-00-987-202513419 INTERCHANGEABLE
Printed Circuit Board
Custom Metering Company Inc
3020-01-555-086213419 INTERCHANGEABLE
Sprocket Wheel
Gta Marine Dba Gta Marine
Cross-Reference Index
Part NumberManufacturer
1080 Bridgeport Fittings Inc (USA)
RW-21 Egs Electric Co Llc (USA)
RW-522 Neer Mfg Co Inc (USA)
1382 Raco, a Division of Hubbell Incorporated(delaware) (USA)
WA-175 Abb Installation Products Inc (USA)
705 Efcor Inc
13419 Atlas Technologies Inc (USA)
1456-E Atlas Technologies Inc (USA)
Related Parts
1680-00-099-5047INTERCHANGEABLE
SPINDLE,VALVE
13419
5330-00-136-7211INTERCHANGEABLE
SEAL,PLAIN ENCASED
5975-00-265-7776INTERCHANGEABLE
REDUCING WASHER,KNOCKOUT
1650-00-474-1720INTERCHANGEABLE
DISK,VALVE
13419
5930-00-717-6145INTERCHANGEABLE
SWITCH ASSEMBLY
4254961
5365-00-785-2886INTERCHANGEABLE
SHIM
13419
5998-00-987-2025INTERCHANGEABLE
PRINTED CIRCUIT BOARD
13419
3020-01-555-0862INTERCHANGEABLE
SPROCKET WHEEL
13419

Frequently Asked Questions

What is NSN 5975-00-280-9183?

NSN 5975-00-280-9183 is a Reducing Washer,knockout, manufactured by Bridgeport Fittings Inc, classified under FSC 5975 (No Item Name Available). Status: active.

What are the part numbers for NSN 5975-00-280-9183?

NSN 5975-00-280-9183 has 8 cross-referenced part numbers: 1080 (Bridgeport Fittings Inc), RW-21 (Egs Electric Co Llc), RW-522 (Neer Mfg Co Inc), 1382 (Raco, a Division of Hubbell Incorporated(delaware)), WA-175 (Abb Installation Products Inc) and 3 more.

What NSN replaces 5975-00-280-9183?

There are 8 known substitutes for 5975-00-280-9183: 1680-00-099-5047, 5330-00-136-7211, 5975-00-265-7776 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1080?

Key specifications for 1080: Material: STEEL; Design Type: FLAT; Conduit Size Accommodated: 1.500 INCHES NOMINAL IN; Knockout Size for Which Designed: 2.500 INCHES NOMINAL IN. 4 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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