PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11720Washer,flat

International Jensen Inc Jensen Sound Laboratories · NSN 5310-00-580-3039 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-580-3039 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-580-3039. Primary manufacturer part number: 11720.
Features
  • Washer,flat — FSC 5310
  • Hardness Rating: 50.0 DUROMETER NOMINAL
  • Hole Diameter: 0.850 INCHES NOMINAL IN
  • Cross-Sectional Shape Style: RECTANGULAR
  • Material: RUBBER NATURAL OR RUBBER SYNTHETIC OVERALL
  • Material Document and Classification: MIL-R-900 MIL SPEC ALL MATERIAL RESPONSES OVERALL
  • Overall Diameter: 1.250 INCHES NOMINAL IN
  • Peripheral Shape Style: ROUND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Rubber Natural or Rubber Synthetic Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-580-3039, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is International Jensen Inc Jensen Sound Laboratories. Government technical data includes 9 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-580-3039
Primary Part Number11720
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerInternational Jensen Inc Jensen Sound Laboratories
StatusACTIVE
Hardness Rating50.0 DUROMETER NOMINAL
Hole Diameter0.850 INCHES NOMINAL IN
Cross-Sectional Shape StyleRECTANGULAR
MaterialRUBBER NATURAL OR RUBBER SYNTHETIC OVERALL
Material Document and ClassificationMIL-R-900 MIL SPEC ALL MATERIAL RESPONSES OVERALL
Overall Diameter1.250 INCHES NOMINAL IN
Peripheral Shape StyleROUND
Center Hole Shape StyleROUND
Thickness0.187 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5935-00-153-439711-720 INTERCHANGEABLE
Connector,receptacle,electrical
Pollak Joseph Corp
5307-00-174-193111720 INTERCHANGEABLE
Stud,plain
Circor Naval Solutions Llc Dba Warren Pumps
3455-00-995-190911720 INTERCHANGEABLE
Cutter,milling,woodruff Keyseat
Niagara Cutter Inc
5340-01-124-5977282509 INTERCHANGEABLE
Shield,expansion
Hilti Inc
5950-01-129-628811720 INTERCHANGEABLE
Transformer,power
Standex Electronics, Inc.
6550-01-139-7476211720 INTERCHANGEABLE
Culture Medium,thioglycollate
Becton, Dickinson and Company Dba Becton Dickinson & Co
6150-01-174-174321024383-101 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
6540-01-239-547411620 INTERCHANGEABLE
Ophthalmoscope
Welch Allyn, Inc.
6540-01-414-2056 INTERCHANGEABLE
Ophthalmoscope
6540-01-466-735811720 INTERCHANGEABLE
Ophthalmoscope
Welch Allyn, Inc.
Cross-Reference Index
Part NumberManufacturer
11720 International Jensen Inc Jensen Sound Laboratories (USA)
Related Parts
5935-00-153-4397INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
11-720
5307-00-174-1931INTERCHANGEABLE
STUD,PLAIN
11720
3455-00-995-1909INTERCHANGEABLE
CUTTER,MILLING,WOODRUFF KEYSEAT
11720
5340-01-124-5977INTERCHANGEABLE
SHIELD,EXPANSION
282509
5950-01-129-6288INTERCHANGEABLE
TRANSFORMER,POWER
11720
6550-01-139-7476INTERCHANGEABLE
CULTURE MEDIUM,THIOGLYCOLLATE
211720
6150-01-174-1743INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
21024383-101
6540-01-239-5474INTERCHANGEABLE
OPHTHALMOSCOPE
11620
6540-01-414-2056INTERCHANGEABLE
OPHTHALMOSCOPE
6540-01-466-7358INTERCHANGEABLE
OPHTHALMOSCOPE
11720

Frequently Asked Questions

What is NSN 5310-00-580-3039?

NSN 5310-00-580-3039 is a Washer,flat, manufactured by International Jensen Inc Jensen Sound Laboratories, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-580-3039?

NSN 5310-00-580-3039 has 1 cross-referenced part number: 11720 (International Jensen Inc Jensen Sound Laboratories).

What NSN replaces 5310-00-580-3039?

There are 10 known substitutes for 5310-00-580-3039: 5935-00-153-4397, 5307-00-174-1931, 3455-00-995-1909 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 11720?

Key specifications for 11720: Hardness Rating: 50.0 DUROMETER NOMINAL; Hole Diameter: 0.850 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Material: RUBBER NATURAL OR RUBBER SYNTHETIC OVERALL. 9 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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