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Item #:
5649107
Grk 772691577788 Itw Brands-57778
Item #:
5649107
MWK 136691
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Imported from USA store
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This product is not Fulfilled by Ubuy and can take minimum 10 days in delivery. We might cancel the product from the order and refund you if any issue arise with the delivery of this product.
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Recessed Star drive affords zero stripping with 6 points of contact. Aggressive Heavy Duty Threads lock into concrete and can be removed/reinserted without screw damage.
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Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
High-Quality Materials
Crafted from premium materials, GRK products ensure durability and strength, appealing to professionals seeking reliable, long-lasting solutions for all their construction and renovation projects.
Innovative Design
The unique design of GRK screws and fasteners promotes quick installation and efficient load management, making it an ideal choice for builders wanting to enhance productivity without compromising quality.
Versatile Application
GRK's range of products caters to diverse needs, from woodworking to heavy-duty construction, providing users with a trusted option for various projects, ensuring satisfaction and reliability across applications.
Product Details
| Item Dimensions | 7 x 2 x 4 inches (17.8 x 5.1 x 10.2 cm) |
| Thread Size | 19/64 |
| Item Weight | 2.4 ounces (68.04 grams) |
| Thread Coverage | Partially Threaded |
| Fastener Size | 19/64 |
| Size Name | 19/64 |
| Compatible Groove Diameter | 0.25 Inches (0.6 cm) |
| Number of Pieces | 25 |
| Brand | GRK |
| Color | Yellow |
| Fastener Type | Machine Screw |
| UPC | 772691577788 |
| Global Trade Identification Number | 00772691577788 |
| Set Name | Pack of 25 |
| Number Of Items | 1 |
| Part Number | ITW BRANDS - 57778 |
| Model | 772691577788 |
| Unit Count | 1.0 Count |
| Item Type Name | ITW BRANDS - 57778 |
| Manufacturer | GRK |
| Included Components | ITW BRANDS - 57778 |
| Screw Head Style | Bugle |
| Screw Point Style | Star |
| Head Type | Flat |
| Thread Type | Unc |
| Set Screw Thread Type | Standard |
| Thread Style | Right Hand |
| Thread Class | 2B |
| Drive System | Torx |
| Material Type | Steel |
| Exterior Finish | Climatek |
| Metal Type | Alloy Steel |
| Finish Types | Climatek |
| Material | Steel |
| Head Style | Bugle |
| Item dimensions L x W x H | 7 x 2 x 4 inches (17.8 x 5.1 x 10.2 cm) |
Who Should Buy?
-
Professional Builders
Ideal for contractors needing reliable fasteners that provide strong hold for various construction projects.
-
DIY Enthusiasts
Great for home improvement projects where long-lasting durability and ease of use are essential.
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Outdoor Applications
Suitable for outdoor structures requiring rust-resistant materials to withstand weather conditions effectively.
-
Occasional Users
Those who only need fasteners occasionally might find these products more than they require.
Product Description
Grk 772691577788 Itw Brands-57778
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Customer Questions & Answers
-
Question:
Is the product compatible with GRK Drill bits only?
Answer: Yes, the product is recommended for use with GRK Drill bits for optimal performance. -
Question:
Can the screws be easily removed without damage?
Answer: Yes, the Aggressive Heavy Duty Threads allow the screws to be removed and reinserted without damage. -
Question:
Is the Climatek coating suitable for use in treated lumber?
Answer: Yes, the Climatek coating is AC257 Code-Approved for use in treated lumber.
GRK Machine Screws Editorial Review
The GRK CAL1964312HPXL Caliburn-XL HandyPak 1964 by 3-12-Inch screws seem to be a reliable and efficient option for those looking to anchor items in concrete. Based on customer reviews, they have a good reputation for not stripping out the hole they are drilled into, and offer plenty of holding power. Customers who have used the screws to anchor 4x4 post brackets have been particularly impressed. Overall, the product appears to be a worthwhile investment for those in need of concrete fasteners.
Customer Reviews & Ratings
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Pros
- Impressive holding power
- Does not strip out the hole
- Reliable for anchoring items in concrete
Cons
- No negative feedback given in the reviews provided.
Platform Trust & Buyer Confidence
MA
Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
CK
Chitra
Verified buyer
“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
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kund
Verified buyer
“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
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Onesi
Verified buyer
“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
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SAO JOHN
Verified buyer
“Ubuy is a great online platform to buy stuff. Reliable, fast delivery time and great value for money. I've been using Ubuy online shopping platform for three years now and will continue to do so.”
23 July 2026 · via Trustpilot
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Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
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MWK 136691
This product is not Fulfilled by Ubuy and can take minimum 10 days in delivery. We might cancel the product from the order and refund you if any issue arise with the delivery of this product.
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
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PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
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Fastest cross-border delivery
Features & Benefits
- Professionally engineered with patented thread design
- Available in three different head designs
- Recommended for use with GRK Drill bits
- Recessed Star drive prevents stripping
- Aggressive Heavy Duty Threads for secure fastening
- Ideal for anchoring to concrete or wood to concrete applications
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