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FASTENER DIMENSIONAL DATA


Click the links below to see for dimentional and other techincal data
Bolt Size/Wrench Size Screws (Pan Head) Thread fit classification
Nuts (Cap) Screws (Hex Head Cap) Thread Length
Nuts (Nylon Insert) Screws (Pan Head) Torque values
Screws & Bolt head Screws (Oval Head) Washers (flat & fender)
Screws (Button head cap) Screws (Machine/Sheet Metal/Wood) Washers (AN 960 SS flat)
Screws (Flat Head) Screws (Truss) Washers (MS 15795 SS flat)
Screws (Fillister Head) Tensile Strength styles Wing nuts
* All dimensions are +/-5%
*Only USS course (UNC & SAE fine are available from  stock.
* All threads are class 2 tolerances which is industry standard.
* Screw lengths are measured from the widest part of the head as illustrated in the screw and bolt head styles chart.
* Machine screws are threaded up to the head. bolts (cap screws) are threaded to diameter X 2 - 1/4"
* Hex bolts have marks to indicate manufacturer. The marks are easily removed with a file or sandpaper.

SCREW AND BOLT HEAD STYLES

Note: Screw Lengths measured line.

CAP NUTS

Diameter #4 #6 #8 #10 #12 1/4 5/16 3/8 7/16 1/2 5/8 3/4
Dim Across Flats 1/4 5/16 5/16 3/8 3/9 7/16 9/16 5/8 5/8 3/4 1" 11/16
Thickness 1/4 19/64 5/16 25/64 27/64 15/32 17/32 5/8 23/32 13/16 63/64 13/16
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WASHERS-FLAT & FENDER

Size

#10*

#10

1/4*

1/4

1/4

1/4

1/4

5/16*

5/16

5/16

3/8*

3/8

3/8

3/8

7/16*

O.D.

.6875

1"

5/8

11/16

1"

1 1/4

1 1/2

3/4

1 3/8

1 1/2

7/8

1"

1 3/8

1 1/2

1 1/8

I.D.

.203

.203

9/32

9/32

9/32

9/32

9/32

11/32

11/32

11/32

13/32

13/32

13/32

13/32

1/2

Thickness

.062

.062

.045

.045

.062

.062

.062

.045

.062

.062

.045

.045

.062

.062

.062

Size

1/2*

1/2

9/16

5/8*

3/4

3/4*

3/4

7/8*

1" *

1 1/8

1 1/4

1 1/2

O.D.

1 1/4

2

1 3/8

1 1/2

1 3/4

1 7/8

2

2

2

2 1/2

2 3/4

3 1/4

I.D.

17/32

17/32

5/8

11/16

13/16

13/16

13/16

15/16

1.062

1.875

1.312

1.563

Thickness

.062

.062

.078

.078

.109

.109

.125

.109

.125

.125

.125

.140
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NYLON INSERT NUTS

Diameter

#4

#6

#8

#10

#12

1/4

5/16

3/8

7/16

1/2

5/8

3/4

Dim Across Flats

.250

.312

.344

.375

.438

.438

.500

.563

.625

.750

.938

1.063

Thickness

.141

.172

.234

.234

.313

.313

.344

.453

.453

.594

.750

.875
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BOLT SIZE/WRENCH SIZE CONVERSION

Bolt Size

Wrench Size

#6

1/4"

#8

1/4"

#10

5/16"

1/4"

7/16"

5/16"

1/2"

3/8"

9/16"

7/16"

5/8"

1/2"

3/4"

5/8"

15/16"

3/4"

1 1/8"
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AN 960 SIZES STAINLESS FLAT WASHERS

SIZE

O.D.

I.D.

THICK.

C2

.250

.099

1/32

C2L

.250

.099

1/64

C3

.250

.109

1/32

C3L

.250

.109

1/64

C4

.312

.125

1/32

C4L

.312

.125

1/64

C5

.438

.140

3/64

C6

.375

.149

1/32

C6L

.375

.149

1/64

C8

.375

.174

1/32

C8L

.375

.174

1/64

C10

.437

.203

1/16

C10L

.437

.203

1/32

C416

.500

.265

1/16

C416L

.500

.265

1/32

C516

.562

.328

1/16

C516L

.562

.328

1/32

C616

.625

.390

1/16

C616L

.625

.390

1/32

C716

.750

.453

1/16

C716L

.750

.453

1/32

C816

.875

.516

1/16

C816L

.875

.516

1/32

C916

1.062

.578

1/16

C916L

1.062

.578

1/32

C1016

1.187

.641

1/16

C1016L

1.187

.641

1/32

C1216

1.312

.766

3/32

C1216L

1.312

.766

1/32

C1416

1.500

.890

3/32

C1616

1.750

1.016

3/32
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TORQUE VALUES

Bolt Size Stainless Steel (ft-lbs.)
1/4-20 5
1/4-28 6
5/16-18 11
3/8-16 18
3/8-24 20
7/16-14 28
7/16-20 29
1/2-13 39
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TENSILE STRENGTH OF FASTENERS

Stainless Steel = 85,000 lbs. Grade 2 steel=85,000 lbs
Grade 5 Steel=120,000 lbs. Grade 8 steel=150,000 lbs.
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THREAD FIT CLASSIFICATION

External threads (screws & bolts) are classified as 1A, 2A or 3A. Internal threads (nuts) are classified as 1B, 2B or 3B, the class 1 threads are a loose fit, the class 3 threads are a very tight fit. All fasteners in this catalog are manufactured to a class 2 tolerance which is the industry standard.
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THREAD LENGTH

Screw length are measured from the widest part of the head to the end of the shank as shown  below. Machine screws and carriage bolts are threaded up to the head. Cap screws (bolts) are threaded to a length equal to 2X diameter + 1/4". 
Example:  1/4-20X3 bolt is threaded 2 X 1/4 = 3/4" thread
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HEX HEAD CAP SCREWS

Dia of Screw

#8

#10

1/4

5/16

3/8

7/16

1/2

5/8

3/4

Diameter Across Flat

.250

.312

7/16

1/2

9/16

5/8

3/4

15/16

1 1/8

Head Height

.110

.120

5/32

13/64

15/64

9/32

5/16

25/64

15/32
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SOCKET HEAD CAP SCREWS

Diameter of Screw

#8

#10

1/4

5/16

3/8

7/16

1/2

5/8

3/4

Diameter of Head

.270

5/16

3/8

15/32

9/16

21/32

3/4

15/16

1 1/8

Head Height

.164

.190

1/4

5/15

3/8

7/16

1/2

5/8

3/4
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BUTTON HEAD SOCKET CAP SCREWS

Diameter of Screw

#8

#10

1/4

5/16

3/8

1/2

5/8

Diameter of Head

.312

.361

.437

.547

.656

.875

1.00

Head Height

.110

.120

5/32

13/64

15/64

.265

.331
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MACHINE/SHEET METAL/WOOD SCREWS

Screw Size

#4

#6

#8

#10

#12

#14

1/4

5/16

3/8

Head Diameter

.202

.250

.298

.347

.395

.443

.458

.574

.698
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FLAT HEAD

Screw Size

#4

#6

#8

#10

#12

#14

1/4

5/16

3/8

Head Diameter

.210

.262

.312

.363

.414

.464

.485

.608

.731
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OVAL HEAD

Screw Size

#4

#6

#8

#10

#12

#14

1/4

5/16

3/8

Head Diameter

.210

.262

.312

.363

.414

.464

.485

.608

.731
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FILLISTER HEAD

Screw Size

#4

#6

#8

#10

#12

#14

1/4

5/16

3/8

Head Diameter

.175

.217

.260

.303

.346


.402

.504

.606
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TRUSS  HEAD

Screw Size

#4

#6

#8

#10

#12

#14

1/4

5/16

3/8

Head Diameter

.249

.312

.374

.437

.499


.560

.682

.805
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PAN HEAD

Screw Size

#4

#6

#8

#10

#12

#14

1/4

5/16

3/8

Head Diameter

.212

.263

.319

.365

.416


.483

.605

.728
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WING NUTS

Diameter

#4

#6

#8

#10

1/4

5/16

3/8

1/2

Wing Span Max/Min

.72/.50

.72/.59

.91/.78

.91/.78

1.10/.97

1.25/1.12

1.49/1.31

1.94/1.81

Thickness Nominal

.125

.125

.171

.171

.187

.238

.250

.35
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MS 15795 STAINLESS-FLAT WASHERS

Bolt
 Size

I.D.
Inches

O.D.
Inches

Thick.

MS Dash No.

10

.218

.437

.038

-808

10

.250

.562

.055

-809

1/4

.281

.625

.060

-810

1/4

.312

.750

.060

-811

5/16

.343

.687

.060

-812

5/16

.375

.875

.080

-813

3/8

.406

.812

.060

-814

3/8

.437

1.000

.075

-815

7/16

.468

.921

.060

-816

7/16

.500

1.250

.075

-817

1/2

.531

1.062

.078

-818

1/2

.562

1.375

.080

-819

5/8

.656

1.312

.078

-820

5/8

.687

1.750

.110

-821

3/4

.812

1.500

.110

-822

3/4

.812

2.000

.125

-823

7/8

.937

1.750

.110

-824

7/8

.937

2.250

.125

-825
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Compound 		Bolts Washers Request for
Quote 		Screws Pins Clips

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