A2 bolts with head knurled M8 M10 Socket cap screws stainless steel hex head bolts DIN912 machine screw

Group Sems Screw
Min. Order 1 piece
Terms of Payment all
Update Time 2019-06-06

Place of Origin  :  China

Material  :  Carbon Steel, Brass, Stainless steel, Steel, Alloy Steel, Aluminum, titanium, and as per customer's request

Heat treating & Surface treatment  :  Tempering,Hardening,Spheroidizing,Stress Relieving.

Surface : Zinc Plated, Zinc Yellow, Geomet, JS 500, E-Coating, Hot Dipped Galvanized, Nickle, Brass, Dacromet, Black Oxide, Black Phosphate, and as per customer's request

Standard  :  ASTM, ANSI, AISI, DIN, ISO, IFI, JIS and Non-standard

Size  :  Customized

Certificate  :  ISO 9001:2015

Quality  :  Top high quality

Sample  :  Free

Packaging  :  Bulk in cartons (25kg Max.) or as your packaging requirements

Payment terms :  T/T,FOB, CIF, CFR, L/C, or others

Notes  :  Special specifications and marks can be made according to customer’s requirements


                               SEMS(TAPPING) SCREW 

SEMS combines two normally seperate parts-typically a screw and a washer- into one permanently pre-assembled cost saving component. Washers are hel in place under the screw head by the rolled threads; they will not fall off and are free to rotate



* Speeds: production by eliminating hand assembly at the work station

* Permanent: Capturing of washer insures that it will never come off or be left off your assembly

* Adapts easily to automated feeding devices and driving tools

* Available in any combination of screw type, head style, washer and thread configuration

* Production Range: M2.5 (#2) ~ M 12 ~ (1/2". Length: 4mm (5/32") ~ 160mm (6")

* ISO 9001 certificated manufacturer & exporter


Coarse threaded Screws with captive curved spring lock washer DIN6900

Examples of screw and washer assemblies

Figure 1. Assembly with screw threaded approximately up to the head

Figure 2. Assembly with screw unthreaded portion of shank