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DIN6921 Plain Finish Bicycle Hex Head Bolts , 3/8 '' ~ 3/4 '' Bed Frame Fasteners

DIN6921 Plain Finish Bicycle Hex Head Bolts , 3/8 '' ~ 3/4 '' Bed Frame Fasteners

  • DIN6921 Plain Finish Bicycle Hex Head Bolts ,  3/8 '' ~ 3/4 '' Bed Frame Fasteners
  • DIN6921 Plain Finish Bicycle Hex Head Bolts ,  3/8 '' ~ 3/4 '' Bed Frame Fasteners
  • DIN6921 Plain Finish Bicycle Hex Head Bolts ,  3/8 '' ~ 3/4 '' Bed Frame Fasteners
  • DIN6921 Plain Finish Bicycle Hex Head Bolts ,  3/8 '' ~ 3/4 '' Bed Frame Fasteners
DIN6921 Plain Finish Bicycle Hex Head Bolts ,  3/8 '' ~ 3/4 '' Bed Frame Fasteners
Product Details:
Place of Origin: Jiangsu, China
Brand Name: crever
Certification: ISO9001
Model Number: DIN6921
Payment & Shipping Terms:
Minimum Order Quantity: Negotiable
Price: Negotiable
Packaging Details: bulk packing, small box packing, packing as required
Delivery Time: 10-20 working days
Payment Terms: T/T, L/C, D/P
Supply Ability: 300 ton per month
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Detailed Product Description
Name: Hex Flange Bolt, Frame Bolt Colour: Plain, Black Oxide, Gray, Zinc, HDG, Ruspert, Nickel
Material: Carbon Steel, Alloy Steel, Stainless Steel Head Type: External Hex
Thread: Fully Threaded, Partical Threaded Sizes: 3/8''~~3/4''
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DIN6921 Plain Finish Bicycle Hex Head Bolts , 3/8 '' ~ 3/4 '' Bed Frame Fasteners

1. Description:

 

     Hex flange bolts are used on vehicle frames, especially truck frames, and anywhere a hex washer head bolt is needed. The large bearing surface distributes clamping force over a large area, allowing them to be used with irregular and oversized holes. Hex flange bolts are often used with Grade G Flange Style Lock Nuts to create a bolt/nut system that resists loosening and spans a wide area. They are also known as:hex frame flange bolts, hex washer frame bolts, hex flange screws.

 

    Serrated hex flange bolts have teeth under their head that grip the mating surface to resist loosening. 12 point flange bolts, also called counterbore cap screws, are used in aircraft and aftermarket automotive applications because they are easily installed using a 12 point socket and pneumatic impact wrench, while motorcycle enthusiasts like the small, externally wrenched decorative head.

 

      Threads are standard right-hand. Hex and 12 point are available in Unified inch coarse series (UNC, Unified National Coarse) and Unified inch fine (UNF, Unified National Fine); serrated hex in Unified inch coarse. Flange bolts are partially and fully threaded depending on size and length. The point for hex types is chamfered or rounded; for 12 point, it's flat and chamfered.

 

        Typical sizes for hex range from 3/8" to 3/4"; #10 to 1/2" for serrated hex; and 1/4" to 1" in diameter for 12 point. Lengths for hex span from about 1" to 5"; 3/8" to 2 1/2" for serrated hex; and 1/2" to 7" for 12 point. Measure length from the underhead flange bearing surface to the threaded end of the bolt.

The flange bolt should be long enough to allow at least two full threads to extend beyond the nut face after tightening, which ensures full thread engagement with the nut. Conversely, there should be two full threads exposed on the head side of the nut to make sure the nut can be properly tightened. More exposed threads within the grip (the area between the head and nut) will result in a "springier" bolt. It is also recommended that threads not be in the shear plane(s).

 

      The size of the head varies with the size of the flange bolt; the flange diameter of hex types is over 2.1 times the bolt size whereas 12 point heads are smaller at just 1.5 times. Tables 1 and 2 list head width across flats, which is wrench size, and across corners, flange diameter and head height.

Hex serrated, Grade 5, steel, zinc plated; hex, 150,000 PSI, steel, plain finish; and 12 point, alloy steel, plain finish, are common types. 150,000 is sometimes abbreviated 150M—"M" is the Roman numeral for 1,000. You may also see 150K—"K" refers to kilo, also an abbreviation for 1,000, which is based on a French modification of the Greek word chilioi. (Plain finish is unplated so there is no surface treatment to inhibit rust.)

 

       When selecting a nut for use with a graded flange bolt, it is very important that the nut be the same grade as the bolt; one grade higher is also acceptable as one source states. Use hardened flat washers with bolt Grades 5 and 8. As for lock washers, which are often split (helical spring) type, use regular for Grade 2 and high strength alloy steel for Grades 5 and 8.

 

2. Specifications:

 

1. Name: Hex flange serrated bolt

2. Grade: C1018, C1022, SUS201,SUS410,SUS304,SUS316,A2-70,A2-80,A4-80

3. Size: M5mmx25mm--M72x200mm

4. Standard: GB/T 5787

5. Certification: ISO9001, SGS, CTI, ROHS

Product Name
Hex flange head machine screws with serrated under head
Material
stainless steel, carbon steel, alloy steel, brass and so on
Color
plain, black phosphate, gray, white zinc, HDG, ruspert, nickel and so on
Standard
DIN GB ISO JIS BA ANSI
Grade
C1018, C1022, SUS201, SUS304, SUS316, A2-70, A2-80, A4-80, 4.8 6.8 8.8 10.9 12.9
Sizes
M5x25mm--M72x200mm
Thread
full thread, partical thread, metric thread
Drive
philips, pozi, socket, hex, square, sloted, combined

 

3. Applications:

 

    Flange bolts distribute the clamping load across the fastening surface. The teeth acts as a mean to distributing the clamping load of the bolt across the fastening surface. A flange bolt is designed to provide the same holding power as a washer. General Fastening applications where need high strength and superior corrosion resistance. Typical applications Construction, Machine repairs outdoor. Designed for using in high-stress and high-strength applications. Black Grade 8.8 offers corrosion resistance and protection and high tensile. In many industry constructure etc. applications.

 

4. Drawing Dimensions:

 

DIN6921 Plain Finish Bicycle Hex Head Bolts ,  3/8 '' ~ 3/4 '' Bed Frame Fasteners 0

12 Point Flange Bolt Dimensions

Nominal Size Head Width Flange
Diameter
Head
Height
Across
Flats
Across
Corners
Fraction Decimal Max Min Max Max
1/4 0.2500 1/4 9/32 3/8 17/64
5/16 0.3125 5/16 11/32 15/32 5/16
3/8 0.3750 3/8 27/64 9/16 3/8
7/16 0.4375 7/16 31/64 21/32 7/16
1/2 0.5000 1/2 9/16 3/4 1/2
9/16 0.5625 9/16 41/64 27/32 9/16
5/8 0.6250 5/8 45/64 15/16 5/8
3/4 0.7500 3/4 27/32 1 1/8 3/4
7/8 0.8750 7/8 63/64 1 5/16 7/8
1 1.0000 1 1 1/8 1 1/2 1

 

5. Pictures:

DIN6921 Plain Finish Bicycle Hex Head Bolts ,  3/8 '' ~ 3/4 '' Bed Frame Fasteners 1

DIN6921 Plain Finish Bicycle Hex Head Bolts ,  3/8 '' ~ 3/4 '' Bed Frame Fasteners 2

 

HARDENED STEEL HEX FLANGE SERRATED BOLTS

 

 

 

 

 

 

 

 

Contact Details
Suzhou Crever Fastener Co., Ltd

Contact Person: Tom

Tel: +8615995738600

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