This product is a metric self-tapping wood screw manufactured to DIN 7982 (countersunk flat head) or DIN 7981 (pan head), featuring a Phillips cross recess drive and a Type C (or Type F) tapping thread with a sharp cone point. The self-tapping thread creates its own
mating thread when driven into pre-drilled or pilot holes in wood,
chipboard, MDF, plywood, and other timber-based materials,
eliminating the need for pre-tapped inserts. Available in carbon steel (property classes 4.8, 5.8, or 8.8) and stainless steel (A2-304, A4-316) with surface finishes including zinc plating,
yellow zinc, black oxide, or passivated stainless. Thread sizes
from ST2.2 to ST6.3 (metric self-tapping) or equivalent imperial gauges, lengths from 4 mm to 250 mm. Widely used in furniture assembly, joinery, decking, cabinetry,
and general woodworking construction where a flush or low-profile
finish is required.
What are the dimensional specifications for DIN 7982 countersunk
Phillips wood screws?
Thread sizes range from ST2.2 to ST6.3 with metric coarse pitches: ST2.2 (p=0.8 mm), ST2.9 (p=1.1 mm),
ST3.5 (p=1.3 mm), ST3.9 (p=1.3 mm), ST4.2 (p=1.4 mm), ST4.8 (p=1.6
mm), ST5.5 (p=1.8 mm), ST6.3 (p=1.8 mm). Countersunk head diameter
(dk) maximum ranges from 4.3 mm (ST2.2) to 12.4 mm (ST6.3); head height (k) from 1.3 mm to 3.8 mm. Cross recess size: PH1 for ST2.2–ST2.9, PH2 for ST3.5–ST4.8, PH3 for ST5.5–ST6.3. Available lengths per DIN 7982: 6.5 mm to 50 mm for ST2.2–ST4.8, 16 mm to 75 mm for ST5.5, 19 mm to 75 mm for ST6.3. Shank length tolerance per DIN 7982 Table 2.
What are the dimensional specifications for DIN 7981 pan head
Phillips wood screws?
Thread sizes: ST2.2 to ST8.0 with same coarse pitches as DIN 7982. Pan head diameter and height
dimensions per DIN 7981 tables: for No.4 (2.9 mm), head diameter 5.6 mm, head height 2.2 mm. Cross recess size: PH1 for ST2.2–ST2.9, PH2 for ST3.5–ST4.8, PH3
for ST5.5–ST8.0. Length range: 4 mm to 100 mm for ST2.2–ST6.3, 6 mm to 120 mm for ST8.0. Suitable for wood, plastic, brass, and aluminium with
pilot hole size varying by material thickness.
What material property classes, grades, and surface finishes are
available?
Carbon steel versions: property class 4.8 (minimum tensile 400 MPa, yield 320 MPa) for general light-duty
applications; property class 5.8 (500 MPa tensile, 400 MPa yield) for medium-duty; property class 8.8 (800 MPa tensile, 640 MPa yield) for high-strength structural wood
connections. Stainless steel: A2-70 (304 series, 700 MPa tensile) for indoor and mildly corrosive
environments; A4-80 (316 series, 800 MPa tensile) for marine, coastal, and chemically
exposed applications. Surface finishes: electro-zinc plating (5–12 μm, clear or yellow passivation) for basic corrosion
resistance; black oxide for aesthetic finish with mild protection; hot-dip galvanizing for enhanced outdoor durability; mechanical zinc plating for consistent coating thickness.
FAQ
Q:Are you a factory or trading company?
A: We are factories, mainly producing fasteners, such as nuts,
bolts, screws and rods, and meanwhile, we also manage other
hardware products.
Q: Where is your factory located? How can I visit there?
A: Our factory is located in Jiaxing City, Zhejiang Province with a
good location and convenient transportation, which is next to
Shanghai Port, Ningbo Port and Zhapu Port.
Q: How does your factory do regarding quality control?
A: "Quality is priority" we supervise each production link and we
always attach great importance to quality controlling from the
beginning to the end.
