PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3550Washer,flat

International Business Machines Corp Parts Order Center Dept E - 54 · NSN 5310-00-811-0355 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-811-0355 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-811-0355. Primary manufacturer part number: 3550.
Features
  • Washer,flat — FSC 5310
  • Peripheral Shape Style: ROUND
  • Cross-Sectional Shape Style: RECTANGULAR
  • Hole Diameter: 0.265 INCHES NOMINAL IN
  • Thickness: 0.050 INCHES NOMINAL IN
  • Material: STEEL OVERALL
  • Surface Treatment: CADMIUM OVERALL
  • Overall Diameter: 0.562 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,flat, cataloged under National Stock Number 5310-00-811-0355, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is International Business Machines Corp Parts Order Center Dept E - 54. Government technical data includes 8 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-811-0355
Primary Part Number3550
Item NameWasher,flat
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerInternational Business Machines Corp Parts Order Center Dept E - 54
StatusACTIVE
Peripheral Shape StyleROUND
Cross-Sectional Shape StyleRECTANGULAR
Hole Diameter0.265 INCHES NOMINAL IN
Thickness0.050 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Surface TreatmentCADMIUM OVERALL
Overall Diameter0.562 INCHES NOMINAL IN
Center Hole Shape StyleROUND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6105-00-102-27863567 INTERCHANGEABLE
Motor,alternating Current
Peerless of America Inc
2530-00-363-4185394660C91 INTERCHANGEABLE
Cylinder Assembly,hydraulic Brak
Navistar Intl Corp Melrose Park Engine Plant Location /melrose Park/
6635-00-409-88453550 INTERCHANGEABLE
Probe,eddy Current
Olympus America Inc
2520-00-423-0794 INTERCHANGEABLE
Shaft
5985-00-491-7351721862-015 INTERCHANGEABLE
Switch,radio Frequency Transmiss
Raytheon Company Div Rmd Strategic
3030-00-528-4620 INTERCHANGEABLE
Belt,v
6130-01-018-7988003550 INTERCHANGEABLE
Power Supply
Dynalec Corporation
5950-01-046-6983 INTERCHANGEABLE
Coil,radio Frequency
6630-01-066-9000123606 INTERCHANGEABLE
Meter,ph
Newington Electric Co., Inc.
4730-01-342-34243550 INTERCHANGEABLE
Adapter,straight,pipe to Tube
DP Manufacturing Inc.
Cross-Reference Index
Part NumberManufacturer
3550 PRIMARY International Business Machines Corp Parts Order Center Dept E - 54 (USA)
3550 International Business Machines Corporation Dba IBM (USA)
Related Parts
6105-00-102-2786INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
3567
2530-00-363-4185INTERCHANGEABLE
CYLINDER ASSEMBLY,HYDRAULIC BRAK
394660C91
6635-00-409-8845INTERCHANGEABLE
PROBE,EDDY CURRENT
3550
2520-00-423-0794INTERCHANGEABLE
SHAFT
5985-00-491-7351INTERCHANGEABLE
SWITCH,RADIO FREQUENCY TRANSMISS
721862-015
3030-00-528-4620INTERCHANGEABLE
BELT,V
6130-01-018-7988INTERCHANGEABLE
POWER SUPPLY
003550
5950-01-046-6983INTERCHANGEABLE
COIL,RADIO FREQUENCY
6630-01-066-9000INTERCHANGEABLE
METER,PH
123606
4730-01-342-3424INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO TUBE
3550
4030-01-348-3412INTERCHANGEABLE
GUY ATTACHMENT
3550
5340-01-479-2839INTERCHANGEABLE
CLAMP,BLOCK
3568

Frequently Asked Questions

What is NSN 5310-00-811-0355?

NSN 5310-00-811-0355 is a Washer,flat, manufactured by International Business Machines Corp Parts Order Center Dept E - 54, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-811-0355?

NSN 5310-00-811-0355 has 2 cross-referenced part numbers: 3550 (International Business Machines Corp Parts Order Center Dept E - 54), 3550 (International Business Machines Corporation Dba IBM).

What NSN replaces 5310-00-811-0355?

There are 12 known substitutes for 5310-00-811-0355: 6105-00-102-2786, 2530-00-363-4185, 6635-00-409-8845 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3550?

Key specifications for 3550: Peripheral Shape Style: ROUND; Cross-Sectional Shape Style: RECTANGULAR; Hole Diameter: 0.265 INCHES NOMINAL IN; Thickness: 0.050 INCHES NOMINAL IN. 8 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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