50 Pcs McMaster-Carr 3408A6 Slotted Spring Plungers – 3/8"-16 Thread, 6–21 lb Force, SS Thread Lock
New and unused. Clean and in excellent condition — ideal for precision mechanical applications. Bulk quantity of 50 units.
Product Details:
Manufacturer: McMaster-Carr
Part Number: 3408A6
Type: Slotted Spring Plunger with Ball-Nose
Thread Size: 3/8"-16 UNC
Plunger Force: 6–21 lb (initial to final force range)
Body Material: 18-8 Stainless Steel
Ball Material: 440C Stainless Steel (hardened)
Tip Style: Ball-Nose
Drive Type: Slotted
Thread Locking: Pre-applied thread-locking compound
Quantity: 50 pieces
Corrosion Resistance: Excellent (suitable for harsh environments)
Features:
- Built-in thread locker ensures secure installation without backing out under vibration
- Hardened 440C stainless steel ball provides wear resistance and long service life
- 18-8 stainless steel body offers excellent corrosion resistance for use in marine, industrial, or outdoor environments
- Ideal for indexing, locating, and positioning components in machinery or fixtures
50 Pcs McMaster-Carr 3408A6 Slotted Spring Plungers – 3/8"-16 Thread, 6–21 lb Force, SS Thread Lock is backordered and will ship as soon as it is back in stock.
Pickup available at 1128 Western St
Usually ready in 24 hours
Shipping and Delivery
Shipping and Delivery
Shipping Costs
- Customers are responsible for all shipping costs associated with their order.
- Shipping fees will be calculated at checkout based on the weight, dimensions, and destination of your package.
- Any applicable taxes, duties, or customs fees for international orders are also the responsibility of the customer.
Processing Time
- Orders are processed within 2 business days after payment has been received.
- We do not process or ship orders on weekends or holidays.
Shipping Methods
- We partner with reliable carriers, such as UPS, Fedex, & USPS to ensure timely delivery.
- Available shipping options will be displayed at checkout. Customers can select the method that best suits their needs.
Delivery Times
- Delivery times will vary based on the carrier and service selected at checkout. Please read the carrier and service details carefully to make sure you are selecting the correct shipping process.
Tracking Your Order
- Once your order has been shipped, you will receive a confirmation email with tracking information so you can monitor its progress.
Lost, Damaged, or Delayed Shipments
- We are not responsible for lost or delayed shipments caused by the carrier.
- If your package arrives damaged, please contact us within within 48 hours with photos of the damage, and we will assist in filing a claim with the carrier.
Returns Due to Incorrect Address
- Please ensure your shipping address is correct before completing your purchase.
- Orders returned to us due to incorrect or incomplete addresses will require additional shipping fees for reshipment.
Questions?
If you have any further questions about our shipping policy, feel free to reach out to us at info@misterscientific.com. We're here to help!
50 Pcs McMaster-Carr 3408A6 Slotted Spring Plungers – 3/8"-16 Thread, 6–21 lb Force, SS Thread Lock is backordered and will ship as soon as it is back in stock.



