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Bolt Screw 8×90

Model 8×90 / ボルトスクリュー / Japan Power Fastening Corporation (Official website)

Multi-purpose screw-in fixing anchor for direct installation into ALC, plywood and wood without pilot holes. Long model with 30 mm bolt length. Stainless steel version available.

Last verified: (date the content was verified against the source document)

Specifications

Anchor screw nominal size 8 mm P5.0
Bolt Diameter (Metric Thread Nominal) M8
Metric Thread Length 30 mm
Anchor screw length 38 mm
Anchor screw diameter 9.6 mm
Cylindrical section length 22 mm
Head height 3 mm
Tip Shape Pointed tip
Nut Height with Washer 8.5 mm
Nut width across flats 12 mm
Washer Outer Diameter 18 mm
Product code (steel) 725008
Product code (stainless steel sash guard) 725019
Pack quantity 16 本
Middle Box Quantity 5 パック
Outer carton quantity 20 パック
Overall length L 90 mm
Head shape Line head LH4S
Number of packs 16 本
Middle Box Count 5 パック
Number of outer cartons 20 パック
ALC maximum tensile load (embedded 40mm) 1 kN
ALC embedded 45mm maximum tensile load 1.2 kN
Cedar Wood Embedded 40 mm Maximum Tensile Load 5 kN
Structural Plywood Thickness 12 mm Tensile Maximum Load 1.5 kN
Maximum Tensile Load, Extruded Cement Board, Hollow Section Thickness 12 mm 1.5 kN
Maximum Tensile Load, Extruded Cement Board, Column Embedment 40 mm 2 kN
Weight block hollow section wall thickness 20mm maximum tensile load 3 kN
Weight block maximum tensile load (column embedded 40mm) 4 kN
Asphalt embedded 50 mm tensile maximum load 2.5～4 kN
Tensile max load of fire-resistant wood wool cement board, thickness 18mm 2 kN

ボルトスクリュー model comparison

Compare 3 models in the same series by specification.

Model Anchor screw diameter Bolt Diameter (Metric Thread Nominal) Overall length L Metric Thread Length Anchor screw nominal size Anchor screw length Cylindrical section length Washer Outer Diameter
8×45 9.4 mm M8 45 mm 15 mm 8 mm P5.0 25 mm 2 mm 18 mm
8×60 9.6 mm M8 60 mm 20 mm 8 mm P5.0 38 mm 2 mm 18 mm
8×90 This product 9.6 mm M8 90 mm 30 mm 8 mm P5.0 38 mm 22 mm 18 mm

How to choose Screw-in anchors

Points to check when selecting, with the values for this product (8×90).

  1. 1. Select the bolt diameter to suit the attachment

    This product: Bolt Diameter (Metric Thread Nominal) M8

    Determine the nominal diameter of the projecting metric thread (e.g., M6 to M12) according to the hole diameter and bracket specification of the attachment. The nominal diameter also changes the anchor thread diameter, pilot hole diameter, and nut width across flats for the tightening tool, so check these together.

  2. 2. Confirm the required pull-out load is met

    The listed products have pull-out loads of 6 to 18 kN. For hanging or ceiling installations, pull-out is the main load direction, so compare the value with the attachment weight and seismic loads including a safety factor. Also confirm the base strength and conditions under which the stated values were measured.

  3. 3. Check base type and embedment depth

    Holding capacity depends heavily on the base material and embedment depth (30 to 50 mm for listed products). Some examples show a maximum tensile load of about 1 kN in ALC and about 4 kN in lightweight block columns, which are much lower than in concrete, so always verify the compatible bases and the load values for each base.

  4. 4. Install with the specified pilot hole diameter

    The pilot hole diameter (5.5 to 11 mm for listed products) determines how far the threads bite into the base. A hole that is too large results in insufficient holding capacity, while one that is too small can prevent screw-in or cause damage. Use the drill diameter specified by the manufacturer, and note that even types without a pilot hole may require one depending on the base.

  5. 5. Choose a length that suits the attachment thickness

    Overall lengths range from 45 to 120 mm, and different lengths are available for the same nominal diameter. After securing the required embedment depth, select the length so that the attachment thickness (up to 5 to 70 mm) and the projecting thread length needed for the nut and washer are both accommodated.

  6. 6. Check shear load and material

    For applications with lateral forces, such as fixing brackets to walls, check the shear load (7 to 37 kN for listed products). For outdoor or humid locations, check whether steel-only or stainless steel versions are available and select a material suited to the corrosive environment.

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

About Screw-in anchors and all products

Description

Made of steel with trivalent chromate finish, or of stainless steel SUS430 with Sus Guard SG treatment. Head type: line head. Bolt diameter M8, thread outer diameter 9.6 mm, thread length 38 mm, cylindrical section length 22 mm. Used with a nut with washer to fasten attached parts.

Features

  • Direct installation into ALC, plywood and wood without pilot holes
  • Can also be used in extruded cement board and asphalt (pilot hole required)
  • Thick shank diameter provides strong tensile holding force
  • Screw design offers excellent driving performance and holding force

Applications

  • Handrail brackets
  • Cable entry fittings
  • Duct channels
  • Equipment such as TVs and surveillance monitors
  • Air conditioner outdoor unit brackets
  • Block wall reinforcement fittings
  • Eye nuts
  • Furniture assembly and anti-tip fittings

FAQ

Q. Can Bolt Screw 8×90 be installed into ALC, plywood and wood without pilot holes?
A. Yes, it can be installed directly into ALC, plywood and wood without pilot holes. It can also be used in extruded cement board and asphalt, but a pilot hole is required.
Q. What are the material and dimensions of Bolt Screw 8×90?
A. It is available in steel with trivalent chromate finish, or stainless steel SUS430 with Sus Guard SG treatment. Bolt diameter is M8, thread outer diameter is 9.6 mm, thread length is 38 mm, and cylindrical section length is 22 mm.
Q. What are the main applications of Bolt Screw 8×90, and what are the approximate maximum tensile loads?
A. It is used for handrail brackets, cable entry fittings, air conditioner outdoor unit brackets, block wall reinforcement fittings, and furniture assembly and anti-tip fittings. Maximum tensile loads are 1 kN for 40 mm embedment in ALC, 5 kN for 40 mm embedment in cedar wood, 1.5 kN for structural plywood of 12 mm thickness, and 4 kN for 40 mm embedment in heavy block pillar sections.

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

Source documents

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