







25 Pack 3/8" x 4" Flat Head Sleeve Anchors
US$53.98
Arrives as soon as ✓ Free shipping — over $200Description
Product Details Color:Silver Item Dimensions:6 x 6 x 3 inches Number of Items:25 Unit Count:25 Count Part Number:SP341 Size Name:3/8" x 4" Item Diameter:0.38 inches Number of Pieces:25 Ou...
Delivery & Returns
Free shipping over $200
Orders of $200 or more ship free. No code needed.
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Product Details
- Color:Silver
- Item Dimensions:6 x 6 x 3 inches
- Number of Items:25
- Unit Count:25 Count
- Part Number:SP341
- Size Name:3/8" x 4"
- Item Diameter:0.38 inches
- Number of Pieces:25
- Outside Diameter:0.38 inches
- Screw Head Style:Flat
- Thread Size:3/8" x 4"
- Item Shape:Round
- Material Type:Galvanized Steel
- Finish Types:Zinc
- Fastener Type:Bolt
- Set Name:Mindoub 25 Pack 3/8" x 4" Flat Head Sleeve Anchors
- Item Highlight:Zinc Plated Carbon Steel Expansion Bolts for Concrete and Brick, Flush Mount Masonry Fastener Kit
About this item
- FLUSH MOUNT FLAT HEADCountersunk design allows the anchor to sit flush with the surface of the affixed material. Ensures a smooth finish without protruding bolt heads, suitable for installing sliding door tracks, wooden frames, and sill plates where surface clearance is required.
- THROUGH-FIXING INSTALLATIONHole-size equals bolt-size (3/8-inch) design streamlines the installation process. Drill directly through the fixture into the concrete or brick substrate without moving equipment or realigning holes, increasing workflow efficiency for volume mounting tasks.
- ZINC-PLATED CARBON STEELManufactured from carbon steel for high tensile strength and coated with zinc plating to resist rust and corrosion. Built to maintain structural integrity in masonry, solid concrete, and brick fastening applications for both indoor and standard outdoor environments.
- 25-PIECE FASTENER KITIncludes 25 individual 3/8" x 4" sleeve anchors in a sturdy corrugated box. Designed for contractors, builders, and serious DIY users managing volume installations, ensuring sufficient supply for structural support projects and framing jobs.
- BROAD APPLICATION RANGEEngineered for heavy load requirements in concrete and brick. Highly functional for anchoring heavy shelving, garage door hardware, railing bases, and window frames. Provides secure expansion and reliable hold for industrial and residential construction.
Shipping Policy
Iterzen ships from the United States.
Most orders leave the warehouse within 1 business day and arrive in 2–7 business days.
- Free shipping on orders of $200 or more, applied automatically
- Otherwise shipping is a flat $6.90
- Your tracking number is emailed as soon as your order ships
- We currently ship to the lower 48 United States
Return policy
30-day returns.
If it's not quite right, you can request a return within 30 days of delivery, and Iterzen will email you return instructions. Change-of-mind returns must be unused, unassembled, and in their original packaging. There is no restocking fee. Depending on the item's packaged size and weight and how it needs to be collected, a change-of-mind return may have a return shipping or pickup cost. We only deduct the actual cost: we tell you the exact amount and get your OK before arranging a paid return, and if there is no cost, nothing is deducted. Returns for damaged, defective, or incorrect items are free.
How it works
- Email us at support@iterzen.com with your order number.
- We send your return instructions within 1 business day, along with any return shipping cost so you can decide.
- Your refund goes back to your original payment method within 10 business days of the carrier scan.
Damaged or defective on arrival? Send a photo and Iterzen replaces or refunds immediately, return shipping on us, and in most cases you won't need to send anything back.









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