PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5990Washer,recessed

Horton Inc · NSN 5310-01-665-3599 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-665-3599 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-665-3599. Primary manufacturer part number: 5990.
Features
  • Washer,recessed — FSC 5310
  • Material Thickness: 0.25 INCHES NOMINAL IN
  • Outside Diameter: 2.62 INCHES NOMINAL IN
  • Style Designator: RECESSED BOTH SIDES
  • Hole Diameter: 1.25 INCHES NOMINAL IN
  • 2 verified cross-references
  • Primary manufacturer: Horton Inc
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Washer,recessed, cataloged under National Stock Number 5310-01-665-3599, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Horton Inc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-665-3599
Primary Part Number5990
Item NameWasher,recessed
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerHorton Inc
StatusACTIVE
Material Thickness0.25 INCHES NOMINAL IN
Outside Diameter2.62 INCHES NOMINAL IN
Style DesignatorRECESSED BOTH SIDES
Hole Diameter1.25 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5120-00-360-57625990 INTERCHANGEABLE
Adapter,draw Bolt
Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution
5330-00-364-68450S30974 INTERCHANGEABLE
Gasket
Dana Automotive Systems Group, Llc Dba Dana Sealing Products
5998-00-494-84235984 INTERCHANGEABLE
Electronic Components Assembly
Avo Intl
5360-00-510-42005990 INTERCHANGEABLE
Spring,helical,compression
R.h. Industries, Inc.
1680-00-966-99185990-1 INTERCHANGEABLE
Support,seat Fittin
The Boeing Company Div Legacy Am&m
5340-01-104-9826359-5990 INTERCHANGEABLE
Plug,vent
Stemco Inc Sub of Coltec Industries Inc
6105-01-369-2427E971 INTERCHANGEABLE
Motor,alternating Current
General Electric Co Motor Business Group
6685-01-429-89221A21013H01 INTERCHANGEABLE
Probe,humidity-Temperature
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
2530-01-624-26035990 INTERCHANGEABLE
Shaft Tube
Teledyne Flir Unmanned Ground Systems, Inc
Cross-Reference Index
Part NumberManufacturer
5990 PRIMARY Horton Inc (USA)
4293048 Oshkosh Defense Llc (USA)
Related Parts
5120-00-360-5762INTERCHANGEABLE
ADAPTER,DRAW BOLT
5990
5330-00-364-6845INTERCHANGEABLE
GASKET
0S30974
5998-00-494-8423INTERCHANGEABLE
ELECTRONIC COMPONENTS ASSEMBLY
5984
5360-00-510-4200INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
5990
1680-00-966-9918INTERCHANGEABLE
SUPPORT,SEAT FITTIN
5990-1
5340-01-104-9826INTERCHANGEABLE
PLUG,VENT
359-5990
6105-01-369-2427INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
E971
6685-01-429-8922INTERCHANGEABLE
PROBE,HUMIDITY-TEMPERATURE
1A21013H01
2530-01-624-2603INTERCHANGEABLE
SHAFT TUBE
5990

Frequently Asked Questions

What is NSN 5310-01-665-3599?

NSN 5310-01-665-3599 is a Washer,recessed, manufactured by Horton Inc, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-665-3599?

NSN 5310-01-665-3599 has 2 cross-referenced part numbers: 5990 (Horton Inc), 4293048 (Oshkosh Defense Llc).

What NSN replaces 5310-01-665-3599?

There are 9 known substitutes for 5310-01-665-3599: 5120-00-360-5762, 5330-00-364-6845, 5998-00-494-8423 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5990?

Key specifications for 5990: Material Thickness: 0.25 INCHES NOMINAL IN; End Item Identification: MRAP - M-ATV; Outside Diameter: 2.62 INCHES NOMINAL IN; Style Designator: RECESSED BOTH SIDES. 6 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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