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HANDAN HAOSHENG FASTENER CO., LTD.
Teflon-Coated Hex Bolts

Our DIN 933 Grade 6.8 Hex Bolts are medium-strength, fully threaded hexagon head bolts designed for general-purpose fastening applications. Manufactured in strict compliance with DIN 933 standards, these bolts offer a reliable balance of strength, ductility, and cost-effectiveness—making them the ideal choice for light to medium-duty assemblies in construction, machinery, and industrial maintenance.

  • Description

Product Details


Name

Hex Bolts

Materials

Carbon Steel/Stainless Steel

Standards

DIN933

Strength level

6.8 

Tensile Strength

600 MPa (minimum)

Yield Strength

480 MPa (minimum)

Size

M3-M50

Surface finish

ZP/YZP/Black/Teflon/HDG/Dacromet/Geomet

Length

15-500

Samples

Available


Product Parameters


Screw ThreadM1.6M2M2.5M3(M3.5)M4M5M6(M7)M8M10M12(M14)M16(M18)M20(M22)M24(M27)M30(M33)M36(M39)M42(M45)M48(M52)
d
PPitch0.350.40.450.50.60.70.8111.251.51.75222.52.52.5333.53.5444.54.555
amax1.051.21.351.51.82.12.4333.754.55.25667.57.57.59910.510.5121213.513.51515
cmin0.10.10.10.150.150.150.150.150.150.150.150.150.150.20.20.20.20.20.20.20.20.20.30.30.30.30.3
max0.250.250.250.40.40.40.50.50.50.60.60.60.60.80.80.80.80.80.80.80.80.811111
damax22.63.13.64.14.75.76.87.89.211.213.715.717.720.222.424.426.430.433.436.439.442.445.648.652.656.6
dwGrade Amin2.43.24.14.65.15.96.98.99.611.615.617.420.522.525.328.23033.6---------
Grade Bmin-----5.76.78.79.411.415.417.220.12224.827.729.533.23842.746.551.155.959.964.769.474.2
eGrade Amin3.414.325.456.016.587.668.7911.0512.1214.3818.921.124.4926.7530.1433.5335.7239.98---------
Grade Bmin-----7.58.6310.8911.9414.218.7220.8823.9126.1729.5632.9535.0339.5545.250.8555.3760.7966.4471.376.9582.688.25
kNominal Size1.11.41.722.42.83.544.85.36.47.58.81011.512.514151718.72122.52526283033
Grade Amin0.981.281.581.882.282.683.353.854.655.156.227.328.629.8211.2812.2813.7814.78---------
max1.221.521.822.122.522.923.654.154.955.456.567.688.9810.1811.7212.7214.2215.22---------
Grade Bmin-----2.63.263.764.565.066.117.218.519.7111.1512.1513.6514.6516.6518.2820.5822.0824.5825.5827.5829.5832.5
max-----33.744.245.045.546.697.799.0910.2911.8512.8514.3515.3517.3519.1221.4222.9225.4226.4228.4230.4233.5
k1min0.70.91.11.31.61.92.282.633.193.544.285.055.966.87.88.59.610.311.712.814.415.517.217.919.320.922.8
rmin0.10.10.10.10.10.20.20.250.250.40.40.60.60.60.60.80.80.8111111.21.21.61.6
smax=nominal size3.2455.56781011131719222427303236414650556065707580
Grade Amin3.023.824.825.325.826.787.789.7810.7312.7316.7318.6721.6723.6726.6729.6731.6135.38---------
Grade Bmin-----6.647.649.6410.5712.5716.5718.4821.1623.1626.1529.16313540454953.858.863.168.173.178.1


Key Features & Benefits


Fully Threaded Design: Threads run the entire length of the shank, allowing for nut engagement at any point and maximum versatility

Grade 6.8 Strength: Medium tensile strength (600 MPa) with excellent ductility – absorbs shock and vibration better than higher grades

DIN 933 Compliant: Standardized dimensions ensure perfect fit with standard metric nuts and washers

Cost-Effective: Lower cost than higher grades (8.8, 10.9) while providing sufficient strength for many general applications

Good Ductility: More forgiving than higher-strength bolts – bends rather than snaps under overload conditions

Corrosion Resistant: Available in multiple finishes for various environments


Installation Guidelines


1.Select correct nut: Use DIN 934 or ISO 4032 nuts of same grade (or higher)

2.Use flat washer: Distributes load and protects workpiece surface

3.Thread engagement: Minimum 1.5 × diameter for full strength

4.Lubricate threads: Recommended for consistent torque and galling prevention

5.Apply recommended torque: Follow torque tables for Grade 6.8 based on size and lubrication


Why Choose Our DIN 933 Grade 6.8 Bolts?


Standards Compliant: Manufactured to strict DIN 933 specifications

Cost-Effective: Grade 6.8 offers excellent value for non-critical applications

Good Ductility: More forgiving than higher grades – bends before breaking

Fully Threaded Versatility: Use for any length requirement

Quality Assured: Dimensional and mechanical testing; certifications available

Wide Inventory: All standard sizes and finishes in stock


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