#8 × 1 in · Hex drive and integral flange
Stainless Steel #8 × 1 in Hex Head Self-Drilling Screws
This #8 × 1 in screw uses a hex washer head and self-drilling point for selected sheet-metal, bracket and frame connections. The source lists approximately 4.2 × 25 mm as its nominal metric description, with stainless steel grades chosen for the application.
- #8 × 1 in; source nominal size approximately 4.2 × 25 mm
- Integral flange and external hex socket drive
- Tek point with full-length tapping thread
KEY FEATURES & PERFORMANCE
Compact format.
Controlled clamping.
The #8 format combines a broad bearing face with a tool-accessible hex head. A drill point and tapping thread work through the selected metal support, while the flange seats on the attached part. Material selection and joint geometry establish the suitable configuration.
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Material choices for the connection
Heat-treated 410 offers a harder option; 304 and 316 address different exposure requirements. Consider 316 for salt or chemical exposure. The chosen material, point construction and support must be assessed together.
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Defined #8 × 1 in format
The named product has #8 nominal gauge and 1 in length. The source metric notation of approximately 4.2 × 25 mm is descriptive; use the agreed drawing for dimensions, measurement points and tolerances.
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Integral washer face
The broad metal flange distributes bearing contact over a sheet or bracket. This reduces concentrated contact but does not guarantee zero deformation or supply a weather seal on its own.
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Hex socket engagement
A matching socket or nut setter engages the six-sided head. Provide tool clearance and a controlled seating method to transfer torque without damaging the head or attached sheet.
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Point for selected steel or aluminium
The Tek point is listed for light-to-medium gauge steel and aluminium connections. Actual drilling suitability depends on the selected material, point geometry and receiving section.
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Continuous tapping thread
The full-length thread establishes engagement as the fixing advances. Receiving thickness and thread penetration determine the joint; the thread design is not a stand-alone anti-loosening rating.
TECHNICAL SPECIFICATIONS
Size & Configuration Overview
The listed product and series details guide selection of an order configuration.
| Nominal product size | #8 × 1 in (source nominal approximation: 4.2 × 25 mm) |
|---|---|
| Material options | Heat-treated 410 / 304 / 316 stainless steel |
| Head style | Indented hex washer head with integral flange |
| Drive | External hex socket / matching nut setter |
| Point | Self-drilling Tek point |
| Thread arrangement | Full-length tapping thread |
| Other listed series gauges | #8, #10, #12 and #14; this page specifies #8 × 1 in |
| Listed series length range | 1/2-8 in (approximately 13-203 mm); other sizes by enquiry |
| Optional finish | Ruspert coating for an agreed material and size combination |
| Typical supports | Selected light-to-medium gauge steel or aluminium sections |
Published ranges are not a stock matrix. The final grade, diameter, length, point, thread, head and finish combination is agreed in the quotation and defined by the ordered drawing.
APPLICATIONS & CONNECTION PLANNING
Connections & Selection Details
Frames, panels & brackets
Metal-to-metal frames, sheet assemblies and brackets need the point matched to the receiving section. Consider the attached part’s thickness and bearing area as well as the available thread engagement.
HVAC ductwork
Duct connections require socket access around folds and seams and sufficient internal clearance for the point. The integral flange provides bearing contact; any air-sealing requirement needs a separate joint detail.
Aluminium & cladding
Aluminium components and exposed cladding bring contact-metal and finish considerations. Specify the surrounding materials, support thickness and weather-sealing requirement with the screw selection.
Use the fixing schedule and data for the selected fastener and joint. Published applications do not establish a rated load or universal installation method.
COATING SOLUTIONS
A Finish for
the Connection
Ruspert is a listed option for this product range. Head colour matching, passivation and specialty finishes can also be reviewed through the custom-order process.
Select the finish with the stainless steel grade, receiving material and environment. Include contact metals, exposure, colour and any test requirement in the specification. Availability and test documentation apply to the agreed configuration; no salt-spray duration is inferred from another product.
Explore Coating Solutions →CUSTOMER QUESTIONS
Product, OEM & Packaging Q&A
Product selection, custom production and packing details for this screw design.
Product
What does the metric size describe?
The source describes #8 × 1 in as approximately 4.2 × 25 mm. The inch value and rounded metric description are not an exact equality; the order drawing sets nominal dimensions and tolerances.
Product
Does the flange replace a sealing washer?
The integrated flange provides a metal bearing surface. It does not automatically replace an EPDM or other sealing element where moisture or air sealing is required.
Product
Can every grade drill light steel or aluminium equally?
No identical drilling performance is implied by the material list. Specify the grade, point construction and receiving section together, using information for the ordered configuration.
OEM
Can you customise the head, drive and dimensions?
We can review head logos, head shapes, drive details, dimensions and tolerances against your drawing or specified ASME reference. The agreed design defines the production requirement.
OEM
Can you match a colour or surface treatment?
Head colour matching, passivation and specialty finishes can be reviewed for the selected material and application. Provide the colour reference and exposure conditions with your brief.
OEM
Are samples available before production?
Custom samples and initial inspection reports can be arranged before full production. The sample quantity, inspection scope and approval criteria are agreed during development.
Packaging
Which packing formats can we choose?
Small polybags, inner boxes and industrial bulk packing are available formats. Specify the quantity per pack and handling requirements so the packing specification can be agreed.
Packaging
Can inner and outer packs carry our brand?
Yes. Inner and outer box designs, printed logos and brand artwork can be prepared from your supplied files. Artwork and pack dimensions are reviewed before production.
Packaging
Can you include our barcodes and shipping marks?
Private labels, UPC / EAN barcodes, part numbers and shipping marks can be included in the packaging brief. Supply the required data and label layout for checking.
ORDER SUPPORT
Documents, Production & Delivery
Material & inspection records
Material test reports and mill certificates can be requested for the order. Agree the required documents, inspection scope and batch traceability against the selected material before production.
Stock & custom production
Available stock and factory production follow different order routes. Stock availability is checked for the requested configuration; bulk and custom orders are scheduled to the agreed specification and quantity. Timing is established in the quotation.
International shipping
FOB, CIF and DDP arrangements can be discussed for the destination. Shipment tracking supports the agreed transport route. Route availability, DDP coverage and delivery terms are established with the order.
Standards & Material References
| Dimensional references | ASME B18.6.3 / ASME B18.2.1 / ANSI |
|---|---|
| Material / physical references | ASTM F593 (Group 1: 304/305; Group 2: 316) / ASTM A240 |
Confirm the edition, component scope and inspection documents. ANSI needs a specific reference; ASTM F593 group references do not add 305 as a sale option or certify the complete screw.
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