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Flat Head Countersunk Machine Screws in Stainless Steel 304 and 316 for Industrial Procurement

09/22/2026 5

Choose the screw specification before requesting quotation

For industrial assemblies that require a flush countersunk head, our stainless steel flat head machine screws give you a clear sourcing option in 304 and 316 materials. At JLHY, we help you define the required head type, drive, length, thread standard, material grade, and surface condition before quotation so the inquiry can be matched to the correct screw specification.

This product is listed here: Flat Head Machine Screws.

Core specification for procurement review

When you prepare an RFQ, confirm the technical details in one complete line item rather than sending only the product name. That helps us check the requested countersunk machine screw against the intended standard and material grade.

  • Head type: Flat Head, also known as countersunk.
  • Drive types: Hex Socket (Allen), Phillips (PH), with slotted drive on request.
  • Size: Metric.
  • Length range: 4 mm to 100 mm, with custom lengths available.
  • Thread standards: DIN 7991, ISO 10642, and ANSI / ASME Unified Threads.
  • Materials: Stainless Steel 304 (A2-70) and Stainless Steel 316 (A4-70).
  • Surface condition: Natural stainless finish, with passivated finish available as an option.

Material and surface condition

We offer Stainless Steel 304 (A2-70) and Stainless Steel 316 (A4-70). If your purchasing document or drawing specifies A2-70 or A4-70, include that grade directly in the inquiry so the quotation follows the required material callout.

For surface condition, specify natural stainless finish or optional passivation. Keeping this detail clear at RFQ stage helps avoid confusion between standard supply expectations and project-specific finishing requirements.

Drive type and thread standard selection

Hex socket flat head screws suit assemblies designed for Allen drive fastening. Phillips drive can be specified where PH tooling is required. If a slotted drive is needed, state it in the inquiry because it is available on request.

We can quote against DIN 7991, ISO 10642, and ANSI / ASME Unified Threads. Include the applicable standard with diameter, length, material grade, drive type, and surface condition so we can review the countersunk machine screw requirement accurately.

Industrial use, OEM scope, and custom lengths

These flat head machine screws are intended for industrial use where the screw head must sit into a countersunk position. They are relevant for buyers comparing stainless steel fastener options for machinery, equipment, metal components, and other industrial assemblies that call for this head form and thread standard.

We support OEM and bulk supply for this product. Custom lengths are available, so you can send the required length together with the selected standard, material grade, drive type, and quantity when preparing a sourcing request.

Packing and quotation information to send

For quotation, send the full screw specification, quantity, and any order-specific requirements. Useful details include standard, size, length, material grade, drive type, surface condition, and whether you require custom length production.

If your importing, warehouse, or distributor process needs particular packing, carton labeling, or handling instructions, include those requirements with the RFQ. We will review them together with the confirmed screw specification before quoting.

Request a specification-based quote from JLHY

At JLHY, we work with importers, distributors, wholesalers, procurement teams, contractors, and industrial buyers sourcing stainless steel 304 and 316 flat head machine screws. Send us your required standard, size, length, material grade, drive type, surface condition, quantity, and any custom length needs so we can prepare a focused quotation.