Metric Hex Cap Screws Distributor

Additional Specification

 

CAP SCREW THREAD INCH & METRIC

Inch Size Coarse(UNC) Fine(UNF)Decimal EquivalentClosest Metric SizeDecimal Conversion
1/4-20 .250 M6 X 1.0 .236"
1/4-28 .250 M6 X .075 .236
5/16-18 .3125 M8 X 1.25 .315
5/16-24 .3125 M8 X 1.0 .315
3/8-16 .375 M10 X 1.5 .394
3/8-24 .375 M10 X 1.25 .394
7/16-14 .4375    
7/16-20 .4375    
1/2-13 .500 M12 X 1.75 .472
1/2-20 .500 M12 X 1.25 .472
9/16-12 .5625 M14 X 2.0 .551
9/16-18 .5625 M14 X 1.5 .551
5/8-11 .625 M16 X 2.0 .630
5/8-18 .625 M16 X 1.5 .630
3/4-10 .750 M20 X 2.5 .787
3/4-16 .750 M20 X 1.5 .787
7/8-9 .875 M22 X 2.5 .866
7/8-14 .875 M22 X 1.5 .866
1-8 1.00 M24 X 3.0 .945
1-12 1.00 M24 X 2.0 .945
1-14 1.00    
1 1/8-7 1.125    
1 1/8-12 1.125    
1 1/4-7 1.25 M30 X3.5 1.181
1 1/4-12 1.25 M30 X 2.0 1.181

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METRIC THREAD LENGTH FOR HEX HEAD CAP SCREWS

METRIC FASTENERS

Bolt Diameter (mm)Bolts 125mm and ShorterBolts Longer Than 125mm
3 12 -
4 14 -
5 16 22
6 18 24
7 20 26
8 22 28
10 26 32
12 30 36
14 34 40
16 38 44
18 42 48
20 46 52

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METRIC SIZE BOLT HEAD/WRENCH SIZE

Bolt Diameter (mm)ANSI/ISODINDIN/ISO Heavy Hex
4 7 7  
5 8 8  
6 10 10  
7   11  
8 13 13  
10 16 17  
12 18 19 22/21
14 21 22  
16 24 24 27
18   27  
20 30 30 34/32

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Metric Tap and Drill Bit Size

TapDrill Bit Size (Optional Fractional)
3mm x 0.50 2.5 mm
4 x 0.70 3.4
5 x 0.80 4.3
6 x 1.00 5.2
7 x 1.00 6.1 (15/64)
8 x 1.25 6.9 (17/64)
8 x 1.00 7.1
10 x 1.50 8.7
10 x 1.25 8.9 (11/32)
10 x 1.00 9.1
12 x 1.75 10.5
12 x 1.50 10.7 (27/64)
14 x 2.00 12.2
14 x 1.50 12.7
16 x 2.00 14.2 (35/64)
16 x 1.50 14.7

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METRIC CAP SCREW STRENGTH

Metric GradeTensile Strength (Mpa) (Min)Yield Strength, min, (Mpa)Full Size Proofload, (Mpa)MaterialTreatment
Class 8.8 < 16mm 800 640 580 Carbon Steel Quenched & Tempered
Class 8.8 > 16mm 830 660 600    
Class 10.9 1040 940 830 Alloy Steel Quenched & Tempered
Classs 12.9 1220 1100 970 Alloy Steel Quenched & Tempered

 

Nominal
Diameter Of
Thread d(mm)
PitchNominal Stress AreaProperty Class
P(mm)As(mm2)4.68.810.912.9
  Proof Load (As . Ap),N
3 0.5 5.03 1130 2920 4180 4880
3.5 0.6 6.78 1530 3940 5630 6580
4 0.7 8.78 1980 5100 7290 8520
5 0.8 14.2 3200 8230 11800 13800
6 1 20.1 4520 11600 16700 19500
7 1 28.9 6500 16800 24000 28000
8 1.25 36.6 8240 21200 30400 35500
10 1.5 58 13000 33700 48100 56300
12 1.75 84.3 19000 489001) 70000 81800
14 2 115 25900 667001) 95500 112000
16 2 157 35300 910001) 130000 152000
18 2.5 192 43200 11500 159000 186000
20 2.5 245 55100 147000 203000 238000
22 2.5 303 68200 182000 252000 294000
24 3 353 79400 212000 293000 342000
27 3 459 103000 275000 381000 445000
30 3.5 561 126000 337000 466000 544000
33 3.5 694 156000 416000 570000 673000
36 4 817 184000 490000 678000 792000
39 4 976 220000 586000   947000

 

TENSILE STRENGTH

Tensile Strength: The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing.

Yield Strength: The load at which a material exhibits a specific permanent deformation.

Proof Load: An axial tensile load which the product must withstand without evidence of any permanent set.

1MPa = 1N/mm2 = 145 pounds/inch2

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Torque Values for Metric Bolts - Coarse Thread

  Class 4.6 Class 8.8 Class 10.9 
Nominal Size & PitchTensile Stress Area (mm^2)Clamp Load (lbs)Tightening Torque (ft-lbs)Clamp Load (lbs)Tightening Torque (ft-lbs)Clamp Load (lbs)Tightening Torque (ft-lbs)
4-0.70 8.78 333 0.7 858 1.9 1228 2.7
5-0.80 14.2 538 1.5 1387 3.9 1985 5.5
6-1.00 20.1 763 2.6 1968 6.6 2816 9.4
8-1.25 36.6 1389 6.2 3580 16 5123 22.9
10-1.5 58 2200 12.3 5671 31.6 8115 45.2
12-1.75 84.3 3197 21.4 8240 55.1 11792 78.9
14-2.00 115 4379 34.2 11289 88.1 16154 126.1
16-2.00 157 5943 53 15320 137 21924 196
18-2.50 193 7301 73 18822 189 26934 270
20-2.50 245 9286 104 23938 267 34256 382
22-2.50 304 11509 141 296969 364 42457 521
24-3.00 353 13372 179 34471 461 49329 660
27-3.00 459 17428 262 44924 676 64288 968
30-3.50 561 21266 356 54819 917 78448 1312
33-3.50 694 26310 484 67821 1248 97055 1786
36-4.00 817 30982 622 79866 1603 114291 2294

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