PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20090Cover Assembly,protective

Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. · NSN 4520-00-758-9857 · FSC 4520 · No Item Name Available
Verified by PartsTable
NSN 4520-00-758-9857 — this item is cataloged by the U.S. Government under National Stock Number 4520-00-758-9857. Primary manufacturer part number: 20090.
Features
  • Cover Assembly,protective — FSC 4520
  • General Characteristics Item Description: CREW; 20 GA; 8.000 IN. LG; 3.562 IN. W; 3.500 IN. H; CONSISTS OF 1 COVER,PART NO. B-2348; 2 COVER ENDS,PART NO. A-2348; 1 FASTENER SCREW,PART NO. A-2165; AND 1 RETAINING WASHER,PART NO. A-2166 IN
  • 3 verified cross-references
  • Primary manufacturer: Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Cover Assembly,protective, cataloged under National Stock Number 4520-00-758-9857, is classified within Federal Supply Class 4520 (No Item Name Available) of the Plumbing, Heating, and Waste Disposal group. The primary manufacturer of record is Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.. Government technical data includes 1 verified specification, 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
NSN4520-00-758-9857
Primary Part Number20090
Item NameCover Assembly,protective
FSC / FSG4520 / 45 — No Item Name Available
ManufacturerTiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
StatusACTIVE
General Characteristics Item DescriptionCREW; 20 GA; 8.000 IN. LG; 3.562 IN. W; 3.500 IN. H; CONSISTS OF 1 COVER,PART NO. B-2348; 2 COVER ENDS,PART NO. A-2348; 1 FASTENER SCREW,PART NO. A-2165; AND 1 RETAINING WASHER,PART NO. A-2166 IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5330-00-014-591620079 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
3455-00-232-410919834 INTERCHANGEABLE
Reamer,machine
Brown & Sharpe, Inc. Div Precision Measuring Instruments, Tesa Usa
5895-00-233-73092897499 INTERCHANGEABLE
Detector,radio Frequency
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5365-00-358-2265694164 INTERCHANGEABLE
Bushing,tapered
Chrysler Corp Service and Parts Opns
5330-00-383-869407-850601 INTERCHANGEABLE
Gasket
Tvh Parts Co.
5845-00-450-175820090 INTERCHANGEABLE
Sensing Unit,signal
Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems
6515-00-550-720020270 INTERCHANGEABLE
Otoscope
Welch Allyn, Inc.
5970-00-896-3059 INTERCHANGEABLE
Insulator,plate
6605-01-017-1291200090 INTERCHANGEABLE
Azimuth Circle
Baker, Lyman & Company, Inc. Dba Baker Lyman Co
5340-01-087-10573MC2 INTERCHANGEABLE
Cover,access
Oshkosh Defense Llc
Cross-Reference Index
Part NumberManufacturer
20090 Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp. (USA)
B2147 Benmar Heater Div Stacee Mfg Inc (USA)
B2147 Universal Logistics Corp Clark Div (USA)
Related Parts
5330-00-014-5916INTERCHANGEABLE
SEAL,PLAIN ENCASED
20079
3455-00-232-4109INTERCHANGEABLE
REAMER,MACHINE
19834
5895-00-233-7309INTERCHANGEABLE
DETECTOR,RADIO FREQUENCY
2897499
5365-00-358-2265INTERCHANGEABLE
BUSHING,TAPERED
694164
5330-00-383-8694INTERCHANGEABLE
GASKET
07-850601
5845-00-450-1758INTERCHANGEABLE
SENSING UNIT,SIGNAL
20090
6515-00-550-7200INTERCHANGEABLE
OTOSCOPE
20270
5970-00-896-3059INTERCHANGEABLE
INSULATOR,PLATE
6605-01-017-1291INTERCHANGEABLE
AZIMUTH CIRCLE
200090
5340-01-087-1057INTERCHANGEABLE
COVER,ACCESS
3MC2
2030-01-176-7751INTERCHANGEABLE
RETAINER,BEARING TR
B2147
3110-01-207-9059INTERCHANGEABLE
RETAINER,ROLLER,BEARING
B2147

Frequently Asked Questions

What is NSN 4520-00-758-9857?

NSN 4520-00-758-9857 is a Cover Assembly,protective, manufactured by Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp., classified under FSC 4520 (No Item Name Available). Status: active.

What are the part numbers for NSN 4520-00-758-9857?

NSN 4520-00-758-9857 has 3 cross-referenced part numbers: 20090 (Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.), B2147 (Benmar Heater Div Stacee Mfg Inc), B2147 (Universal Logistics Corp Clark Div).

What NSN replaces 4520-00-758-9857?

There are 12 known substitutes for 4520-00-758-9857: 5330-00-014-5916, 3455-00-232-4109, 5895-00-233-7309 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20090?

Key specifications for 20090: General Characteristics Item Description: CREW; 20 GA; 8.000 IN. LG; 3.562 IN. W; 3.500 IN. H; CONSISTS OF 1 COVER,PART NO. B-2348; 2 COVER ENDS,PART NO. A-2348; 1 FASTENER SCREW,PART NO. A-2165; AND 1 RETAINING WASHER,PART NO. A-2166 IN. 1 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