Seastrom logo menu
close
Home Search Request a Quote Custom Capabilities Standard Hardware Military Hardware Standard Washers Engineering Resources About Us Contact Us Customer Service Login Register View Cart Checkout
Seastrom Manufacturing Co., Inc.
LOGIN | REGISTER
1-800-634-2356
shopping_cart
View Cart Checkout
  • Catalog & Military Washers
    • Standard Flat Washers
    • Military Washers
    • ANSI Standard Washers
    • Pre-Packaged Washers
    • Centering Washers
    • Clipped Washers
    • Countersunk Washers
    • C-Shaped Washers
    • D-Shaped Washers
    • D-Shaped Hole Washers
    • Flattened Shaft Washers
    • Key Washers
    • Laminated Washers
    • Lock Washers
    • Notch Washers
    • Rectangular Washers
    • Retaining Washers
    • Retention Washers
    • Shoulder Washers
    • Split Washers
    • Spherical Washers
    • Spring Washers
    • Square Washers
    • Square Hole Washers
    • Tab Washers
    • Terminal Cup Washers
  • Assembly Hardware
    • Bus Bars
    • Clamps & Brackets
    • Expansion Plugs
    • Formed Nuts
    • Ground Straps
    • Hiram Jones Terminals
    • Jumpers
    • Push-On Nuts
    • Retaining Rings
    • Solder Lugs
    • Solid State Insulators
    • Spacers
    • Spring Clips
    • Tags
  • Military Hardware
    • AN
    • M
    • MS
    • NAS
    • Aircraft/Aerospace Industry Approved
  • Precision Stamping
  • CNC Machining
  • Industries
    • Defense
    • Aerospace
    • Electronics
    • Communications
    • Energy
    • Medical
    • Agriculture
    • Machinery
    • Firearms
  • Resources
    • Certification and Compliance
    • Terms & Conditions
    • Environmental Statement
    • Credit Application
    • Seastrom FAQs
    • Engineering Data
    • Engineering Reference Handbook
    • Product Directory
    • How to Specify Special Parts
  • About Us
    • Contact Us
    • About Us
    • Testimonials
    • Careers
    • Survey
Product Search - Prepackaged Washers / External Retention Washer: A639
images/2715_engr.jpg View engineering specs
External Retention Washer

  • External retention washer provides a simple means of retaining a loose component inside a bored hole in an assembly. External retention washers are permanent after assembly.

  • Available Materials: Spring steel external retention washer
  • Available Finishes: Zinc plated external retention washer (other finishes also available)

  • If you need additional information on your particular external retention washer application click on one of the links below:
         View our material & finish specification sheets
         View metallic material characteristic information
         View finish characteristic information

    Did you know Seastrom is more than external retention washers? We manufacture and stock over 44,000 part numbers to make your washer & fastener sourcing job easy.

    Don't see what you need?
    Click here to revise your search
    Click here to request a custom quote
    Click on the Column Name to re-sort data.
    Dimensions in Inches
    Product NumberDesign Hole SizeABT# Of TabsMaterialFinishQty/Pack# of PacksLeadtimeGet Pricing
    A639-390.2500.2580.0620.0106Spring SteelZinc Type III or V1005-6 Weeks for <= 35 Call for Delivery for > 35Price
    A639-400.3120.3220.1250.0106Spring SteelZinc Type III or V100Call for DeliveryPrice
    A639-410.3750.3850.1250.0126Spring SteelZinc Type III or V1085-6 Weeks for <= 180 Call for Delivery for > 180Price
    A639-420.5000.5120.2500.0128Spring SteelZinc Type III or V1035-6 Weeks for <= 3300 Call for Delivery for > 3300Price
    A639-430.7500.7650.4370.0158Spring SteelZinc Type III or V10265-6 Weeks for <= 4768 Call for Delivery for > 4768Price
      Click here for a Custom Quote.

    Contact Us

    • Request a Quote
    • call1-800-634-2356
    • emailinfo@seastrom-mfg.com
    • location_on456 Seastrom St, Twin Falls, ID 83301

    Company Info

    • About Us
    • Industries Served
    • Credit Application
    • Certification and Compliance
    • Terms and Conditions
    • Sitemap

    Product Directory

    • Round Washers & Shims, ANSI Washers
    • Specialty Washers
    • Military Washers
    • Pre-packaged Washers
    • Assembly Hardware
    • Military Hardware

    Purely Custom

    • Bike Fitting
    • Bike Accessories

    Subsidiaries

    • Seastrom Stamping
    • Acacia Machining
    • Precision Metalforming Association
    • Precision Machined Products Association
    • ISO 100 Compliant
    • AS 9100 Compliant
    • Environmental Statement
    • Made in USA
    • ROHS Compliant
    • DFARS Compliant
    • Federal Firearms License
    • ITAR Compliant
    • Cage Code
    icon-payment-visa icon-payment-mastercard icon-payment-discover icon-payment-amex

    Use of this site acknowledges agreement of our Terms and Conditions. All website design, text, graphics, and the selection and arrangement thereof, are the property of Seastrom Manufacturing Co., Inc. and are Copyright ©2026 Seastrom Manufacturing Co., Inc. All Rights Reserved. SEASTROM, SEASTROM MANUFACTURING and the Seastrom logo are trademarks owned by Seastrom Manufacturing Co., Inc.