Boardtech Flat Countersunk Head Stainless Tapping Screw SUS410 5×45

Specifications

ボードテック平サラ ステンレス(サスガードSG処理) model comparison

Compare 6 models in the same series by specification.

How to choose Tapping screws

Points to check when selecting, with the values for this product (725679).

1. 1. Select the range that matches the steel substrate thickness

   This product: Applicable plate thickness maximum 3.2 mm

   Drill screws have both an upper and lower limit on the steel sheet thickness they can drill through with the cutting tip. The listed products have a lower limit of 1.6 mm and an upper limit of 2.3 to 3.2 mm. If the substrate is thicker than the range, the cutting tip wears before the hole is drilled; if thinner, the thread engagement is insufficient. Check both the upper and lower limits against the plate thickness of the substrate steel.

2. 2. Determine the length from the total fastening thickness

   This product: Overall length L 45 mm

   The overall length is determined by the combined thickness of the upper panel and substrate, plus the length needed for the cutting section to fully penetrate. The listed products range from 28 to 100 mm, and the upper and lower fastening thickness limits are specified for each product. If the thread engages before the cutting section (7 to 7.5 mm long) passes through the substrate, the screw may break, so confirm within the fastening thickness range.

3. 3. Choose between full-thread and half-thread types

   This product: Thread type 5 TPI coarse thread, full thread

   Half-thread screws have a plain cylindrical section under the head, so they can pull the upper panel down to the substrate without being pushed up by the threads, which suits fixing thick boards. In the listed products, the 35 and 45 mm lengths are full-thread and 50 mm and longer are half-thread. Select the type according to the upper panel thickness and fixing method.

4. 4. Check the thread outer diameter and cutting tip outer diameter

   This product: Thread outer diameter d 5.0 mm

   The thread outer diameter affects holding power and pilot hole diameter. The listed products have outer diameters of 4.2 to 5 mm, and the cutting tip outer diameter is 3.5 to 4.2 mm. The cutting tip outer diameter is smaller than the thread outer diameter and corresponds to the pilot hole for forming the internal thread. Select the nominal size according to the load conditions, the hole diameter in the upper panel, and the dimensions of the mating member.

5. 5. Match the Phillips drive size and head style

   This product: Cross recess number #2

   Using a bit that does not match the Phillips drive number increases cam-out (bit slipping out) and damage to the recess. For a flush finish, select a countersunk head, and confirm that the head outer diameter of 10 to 12 mm fits within the seating surface or board surface. Match the bit number to the bits used on site.

6. 6. Select material and surface treatment for the service environment

   Steel products with trivalent chromate plating are available for indoor use, and SUS410 products with corrosion-resistant treatment are available for outdoor or corrosive environments. SUS410 is a martensitic grade that gains hardness by quenching, and is used for drill screws. However, its corrosion resistance is inferior to austenitic grades such as SUS304.

This guide was written by AI based on the listed products' documents and specification items.

About Tapping screws and all products

Description

Made of stainless steel SUS410 with SG Sus Guard surface treatment that strengthens the surface layer of SUS410. Suitable for outdoor and corrosive environments.

FAQ

Q. Please tell me about the material and corrosion resistance of Boardtech Flat Countersunk Head Stainless SUS410 5×45 (model number 725679).

A. Made of SUS410, with corrosion resistance improved by SG Sus Guard surface treatment. Suitable for outdoor and corrosive environments.

Q. Please tell me the screw dimensions and applicable plate thickness and fastening thickness for model number 725679.

A. Screw outer diameter d is 5.0 mm, overall length L is 45 mm, and thread length is 32.5 mm. Head outer diameter D is 12 mm, and the Phillips recess number is #2. Applicable plate thickness is 1.6 mm to 3.2 mm, and fastening thickness is 6.6 mm to 32.5 mm.

Q. What applications can Boardtech Flat Countersunk Head Stainless 725679 be used for?

A. It can be used for fastening wood-based building materials, and for fastening in outdoor and corrosive environments.

Q. What features does the screw model number 725679 have?

A. It has fins to prevent co-floating. It is a full thread type.

Written by AI based on the content of the source documents.

Source documents

• Catalog ボードテック 平サラ 製品カタログ(MB TEKS) 2 pages
  Found on: https://www.jpf-net.co.jp/ebook.html