PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20510303Washer,flat

Motor City Fasteners Inc · NSN 5310-01-282-3391 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-282-3391 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-282-3391. Primary manufacturer part number: 20510303.
Features
  • Washer,flat — FSC 5310
  • Overall Diameter: 0.880 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN
  • Hole Diameter: 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
  • Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
  • Thickness: 0.090 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
  • Surface Treatment: CADMIUM OR ZINC OVERALL
  • Material: STEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1552 OR STEEL COMP 1053 OR STEEL COMP 1054 OR STEEL COMP 1055 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1062 OR STEEL COMP 1064 OR STEEL COMP 1065 OVERALL
  • Peripheral Shape Style: ROUND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 1050 or Steel Comp 1551 or Steel Comp 1552 or Steel Comp 1053 or Steel Comp 1054 or Steel Comp 1055 or Steel Comp 1059 or Steel Comp 1060 or Steel Comp 1561 or Steel Comp 1062 or Steel Comp 1064 or Steel Comp 1065 Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-01-282-3391, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Motor City Fasteners Inc. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-01-282-3391
Primary Part Number20510303
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerMotor City Fasteners Inc
StatusCANCELLED
Overall Diameter0.880 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN
Hole Diameter0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
Hardness Rating38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
Thickness0.090 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
Surface TreatmentCADMIUM OR ZINC OVERALL
MaterialSTEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1552 OR STEEL COMP 1053 OR STEEL COMP 1054 OR STEEL COMP 1055 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1062 OR STEEL COMP 1064 OR STEEL COMP 1065 OVERALL
Peripheral Shape StyleROUND
Center Hole Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
9905-00-003-488515341-1 INTERCHANGEABLE
Plate,identification
Hamilton Sundstrand Corporation
4820-00-354-634615-341-1 INTERCHANGEABLE
Disk,valve
Dresser Industries Inc Leroi Div
5815-00-679-8548153440 INTERCHANGEABLE
Bar,selector,teletypewriter
Telemechanics Inc
2530-00-734-80557348055 INTERCHANGEABLE
Arm
U S Army Tank Automotive Command Amsta-Im-Mm
Cross-Reference Index
Part NumberManufacturer
153411 Cummins Inc. (USA)
20510303 PRIMARY Motor City Fasteners Inc (USA)
2051 0303 Military Trucks & Parts, Inc. (USA)
2051 0303 Harsco Corporation Dba B M Y Wyne Wheled Vehicles Div (USA)
Related Parts
9905-00-003-4885INTERCHANGEABLE
PLATE,IDENTIFICATION
15341-1
4820-00-354-6346INTERCHANGEABLE
DISK,VALVE
15-341-1
5815-00-679-8548INTERCHANGEABLE
BAR,SELECTOR,TELETYPEWRITER
153440
2530-00-734-8055INTERCHANGEABLE
ARM
7348055

Frequently Asked Questions

What is NSN 5310-01-282-3391?

NSN 5310-01-282-3391 is a Washer,flat, manufactured by Motor City Fasteners Inc, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-01-282-3391?

NSN 5310-01-282-3391 has 4 cross-referenced part numbers: 153411 (Cummins Inc.), 20510303 (Motor City Fasteners Inc), 2051 0303 (Military Trucks & Parts, Inc.), 2051 0303 (Harsco Corporation Dba B M Y Wyne Wheled Vehicles Div).

What NSN replaces 5310-01-282-3391?

There are 4 known substitutes for 5310-01-282-3391: 9905-00-003-4885, 4820-00-354-6346, 5815-00-679-8548 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20510303?

Key specifications for 20510303: Overall Diameter: 0.880 INCHES MINIMUM AND 0.920 INCHES MAXIMUM IN; Hole Diameter: 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN; Hardness Rating: 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM; Thickness: 0.090 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-01-282-3391 still in active supply?

NSN 5310-01-282-3391 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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