Product Details
Alloy Steel Hex Drive Flat Head Screws Grade 8.8 Countersunk Head
Machine Screws DIN7991 Flat Head Screws
Products Description
Made from alloy steel, these screws are nearly twice as strong as
stainless steel flat head screws. They're angled under the head to
sit flush within countersunk holes. Length is measured from the top
of the head.
Screws with an undercut profile have a shallow head for use in thin materials.
Black-oxide alloy steel screws have mild corrosion resistance in dry
environments.
Zinc-plated alloy steel screws resist corrosion in wet environments.
Products Specification
Thread Size | 4-48 |
Length | 1/4" |
Threading | Fully Threaded |
Flat Head Profile | Standard |
Head Diameter | 0.255" |
Head Height | 0.083" |
Countersink Angle | 82° |
Drive Style | Hex |
Drive Size | 1/16" |
Material | Black-Oxide Alloy Steel |
Hardness | Rockwell C32 |
Tensile Strength | 120,000 psi |
Screw Size Decimal Equivalent | 0.112" |
Thread Type | UNF |
Thread Spacing | Fine |
Thread Fit | Class 3A |
Thread Direction | Right Hand |
Head Type | Flat |
System of Measurement | Inch |
Specifications Met | ASTM F835 |
RoHS | Compliant |
More Pictures
Related Products Information
Understanding Thread Size
Inch thread sizes are specified by diameter and threads per inch. For
those with a diameter smaller than 1/4", diameter is indicated by a
number (e.g., #1 or No. 1).
Metric thread sizes are specified by diameter and pitch.
Company Profile
We are professional manufacture factory of screws, bolts, rivets,
nuts,bushing and non-standard fastener from China.
Suzhou Runtai Prcision Hardware Co,.Ltd was eastiblished in 2000,
located in the Suzhou City. With more than 10 years export
experience, our products has been best-selling in Europe, the
United States, the Southeast Asia.
We can supply the fastener according to GB, DIN, JIS, ANSI, BS, ISO
and other standards, we can also supply fastener according to
customer request.With favorable prices,in-time delivery and perfect after-sales
service, my company have build longterm business relationship with
more than 20 country customers.
Widely praised by my customer.
Quality is the eternal pursuit of my company. In 2011, my company
pass the third part quality system certification ISO9001-2008.
After one year of successfully delvoping, we passed another third
part quality system certification ISO / TS16949.
With advanced production equipment, Modernization detection,
testing equipment and instruments, scientific and effective
management methods, to provide best quality products and services
to customer.