DIN933 Hexagon Socket Head Cap Bolt

Specification

DIN 933 Hex Head Cap Screws

DIN 933 Hex Head Cap Screws are fully threaded, have external coarse machine screw threads and, like other hex head screws, are used with both tapped holes and nuts. Their dimensions are similar to ISO 4017 and are available in Class 8.8, 10.9 and 12.9 steel and Class 70 (A2-70, A4-70) stainless steel; less common stainless steel sizes may be Class 50. Zinc plating protects against corrosion while plain finish is unplated and can rust. A2 stainless steel is considered the same as 18-8 and A4 is essentially 316. Class 8.8 and 10.9 thread tolerance for plain finish is 6g and 6h for plated; stainless steel is 6g; right-hand threads are standard. Also known as hex head bolts and tap bolts, all lengths are fully threaded. Length is measured from under the head to the tip. DIN 933 Hex Head Cap Screws are similar to ISO 4017, JIS B1180 and ANSI B18.2.3.1M. In contrast, DIN 931 is partially threaded and DIN 961 has fine threads. (Note: Thread pitch, the distance between threads, is traditionally omitted for fasteners with coarse threads but is included here for reference.)

DIN 933 - Hexagon head bolts with thread up to head

Current norm: DIN EN 24017
Equivalent norms: ISO 4017; CSN 021103; PN 82105; UNI 5739; EU 24017

Legend:

l - length of bolt
d - the nominal diameter of the thread
k - head height
r - radius
e - the diameter of the circumscribed circle (not less than)
s - size hex head turnkey
c - thickness of the mounting collar
a - length undercut

Makings:QBH

Steel: 5.6,5.8,8.8,10.9,12.9
Stainless: A2,A4
Plastic: Plastic Pa
Non Ferrous: Brass
Thread: 6g

Table according to DIN 933

Process flow

Cold forging

Annealing treatment(if need) ➨ wiredrawing ➨ clod forging ➨ thread rolling ➨make heat treatment(if need) ➨ Finish ➨ Packing

Hot forging

Cutting material ➨ hot forging ➨ turning ➨ shrink diameter(half thread) ➨thread rolling ➨ make heat treatment(if need) ➨ Finish ➨ Packing

Materials and Chemical compstition

PACKING

QBH BULK

20-25KG/CTN,36CTNS/PALLET

20-30KG/BAGS,36BAGS/PALLET

ONE TON/BOXES

50KG/ IRON DRUM,12 IRON DRUMS/PALLET

QBH SMALL PACKING

Packing in small boxes according to customer’s requirements

Packing in plastic bag according to customer’s requirements

QBH PALLET TYPE

SOLID WOOD FUMIGATION PALLET

EURO Pallet

THREE SPLINT PALLET

WOODEN BOX

The advantages of QBH

•  QBH brand sales to the main quality assurance.
•  Years of export trade management, excellent service, word-of-mouth guarantee.
•  By working with TUV,escort for quality.
•  Customization of non-standard parts can be made according to customer's requirements and drawings.
•  For quality customers,we can provide a certain credit period

Product application

The DIN 933 are a hexagon shaped screws, manufactured from steel. Grade 10.9 metric bolts are produced using DIN 933 bolt material such as, either medium carbon steel, medium carbon steel alloy or low carbon boron steel. In order to qualify as a grade DIN 933 bolt 10.9 metric bolts, the allot has to be processed by both quenching as well as tempering. Usually, the DIN 933 bolt 10.9 is used in applications for bolting large and forged parts, and the automotive industry as well.