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Silicon Bronze Hex Cap Screw

Silicon Bronze hex head cap screws are fasteners manufactured from Alloy 651 or Alloy 655. Dimensional specifications are governed by ASME B18.2.1. There are no grade markings on Silicon Bronze hex cap screws. They are commonly used in general construction, refineries, and the power and energy industry. Non-magnetic and electrically conductive, these fasteners are best known for their corrosion resistance. Silicon Bronze cap screws are significantly stronger than brass.

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Governing Standards
Dimensional Specifications

Dimensional Specifications

Dimensional SpecificationsSilicon Bronze

Per ASME B18.2.1-2012
Nominal Diameter		UNC	UNF	E		F			G		H			J	LT		Y
				Body Diameter		Width Across Flats			Width Across Corners		Head Height			Wrench Height	Thread Length		Transition Length
				Max	Min	Basic	Max	Min	Max	Min	Basic	Max	Min	Min	Lengths up to 6"	Lengths > 6"	Max
1/4	0.2500	20	28	0.2500	0.2405	7/16	0.4380	0.4280	0.5050	0.4880	5/32	0.1630	0.1500	0.1060	0.7500	1.0000	0.2500
5/16	0.3125	18	24	0.3125	0.3065	1/2	0.5000	0.4890	0.5770	0.5570	13/64	0.2110	0.1950	0.1400	0.8750	1.1250	0.2750
3/8	0.3750	16	24	0.3750	0.3690	9/16	0.5620	0.5510	0.6500	0.6280	15/64	0.2430	0.2260	0.1600	1.0000	1.2500	0.3120
7/16	0.4375	14	20	0.4375	0.4305	5/8	0.6250	0.6120	0.7220	0.6980	9/32	0.2910	0.2720	0.1950	1.1250	1.3750	0.3570
1/2	0.5000	13	20	0.5000	0.4930	3/4	0.7500	0.7360	0.8660	0.8400	5/16	0.3230	0.3020	0.2150	1.2500	1.5000	0.3850
9/16	0.5625	12	18	0.5625	0.5545	13/16	0.8120	0.7980	0.9380	0.9100	23/64	0.3710	0.3480	0.2500	1.3750	1.6250	0.4170
5/8	0.6250	11	18	0.6250	0.6170	15/16	0.9380	0.9220	1.0830	1.0510	25/64	0.4030	0.3780	0.2690	1.5000	1.7500	0.4550
3/4	0.7500	10	16	0.7500	0.7410	1 1/8	1.1250	1.1000	1.2990	1.2540	15/32	0.4830	0.4550	0.3240	1.7500	2.0000	0.5000
7/8	0.8750	9	14	0.8750	0.8660	1 5/16	1.3120	1.2850	1.5160	1.4650	35/64	0.5630	0.5310	0.3780	2.0000	2.2500	0.5560
1	1.0000	8	14	1.0000	0.9900	1 1/2	1.5000	1.4690	1.7320	1.6750	39/64	0.6270	0.5910	0.4160	2.2500	2.5000	0.6250
1 1/8	1.1250	7	12	1.1250	1.1140	1 11/16	1.6880	1.6310	1.9490	1.8590	11/16	0.7180	0.6580	0.4610	2.5000	2.7500	0.7140
1 1/4	1.2500	7	12	1.2500	1.2390	1 7/8	1.8750	1.8120	2.1650	2.0660	25/32	0.8130	0.7490	0.5300	2.7500	3.0000	0.7140
1 3/8	1.3750	6	12	1.3750	1.3630	2 1/16	2.0620	1.9940	2.3820	2.2730	27/32	0.8780	0.8100	0.5690	3.0000	3.2500	0.8330
1 1/2	1.5000	6	12	1.5000	1.4880	2 1/4	2.2500	2.1750	2.5980	2.4800	15/16	0.9740	0.9020	0.6400	3.2500	3.5000	0.8330

All dimensions are in inches.
Usable thread length for Hex Head Cap Screws under 6 1/4" long can be approximated by the equation THREAD LENGTH = (2 X DIAMETER) + 1/4″

Silicon Bronze Hex Cap Screw

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Diameter Thread Pitch Length Threading Item # Availability Price Quantity UOM

1/4

1/2

Full

HHSB0250050

In Stock

$0.53126/EA

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1/4-20 X 1/2 SILICON BRONZE HEX CAP SCREW

$0.53126/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.53126/ EA
720	$0.4977/ EA
2880	$0.44323/ EA
12930	$0.29372/ EA

1/4

3/4

Full

HHSB0250075

In Stock

$0.94978/EA

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1/4-20 X 3/4 SILICON BRONZE HEX CAP SCREW

$0.94978/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.94978/ EA
570	$0.88978/ EA
2250	$0.7924/ EA
10090	$0.5251/ EA

1/4

Full

HHSB0250100

In Stock

$0.88075/EA

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1/4-20 X 1 SILICON BRONZE HEX CAP SCREW

$0.88075/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.88075/ EA
490	$0.82511/ EA
1950	$0.73481/ EA
8760	$0.48694/ EA

1/4

1 1/4

Full

HHSB0250125

In Stock

$0.87953/EA

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1/4-20 X 1 1/4 SILICON BRONZE HEX CAP SCREW

$0.87953/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.87953/ EA
420	$0.82397/ EA
1650	$0.73379/ EA
7420	$0.48626/ EA

1/4

1 1/2

Full

HHSB0250150

In Stock

$1.69256/EA

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1/4-20 X 1 1/2 SILICON BRONZE HEX CAP SCREW

$1.69256/EA

Qty

In Stock

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Quantity	Price
Quantity	Price
1	$1.69256/ EA
360	$1.58564/ EA
1440	$1.4121/ EA
6470	$0.93577/ EA

1/4

Full

HHSB0250200

In Stock

$1.34696/EA

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1/4-20 X 2 SILICON BRONZE HEX CAP SCREW

$1.34696/EA

Qty

In Stock

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Quantity	Price
Quantity	Price
1	$1.34696/ EA
290	$1.26187/ EA
1140	$1.12376/ EA
5110	$0.74469/ EA

5/16

1/2

Full

HHSB0310050

In Stock

$0.60072/EA

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5/16-18 X 1/2 SILICON BRONZE HEX CAP SCREW

$0.60072/EA

Qty

In Stock

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Quantity	Price
Quantity	Price
1	$0.60072/ EA
440	$0.56306/ EA
1760	$0.50067/ EA
7920	$0.33363/ EA

5/16

3/4

Full

HHSB0310075

In Stock

$1.02223/EA

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5/16-18 X 3/4 SILICON BRONZE HEX CAP SCREW

$1.02223/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.02223/ EA
350	$0.95815/ EA
1380	$0.85197/ EA
6200	$0.56773/ EA

5/16

Full

HHSB0310100

In Stock

$1.0012/EA

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5/16-18 X 1 SILICON BRONZE HEX CAP SCREW

$1.0012/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.0012/ EA
300	$0.93844/ EA
1200	$0.83445/ EA
5380	$0.55605/ EA

5/16

1 1/4

Full

HHSB0310125

In Stock

$1.29844/EA

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5/16-18 X 1 1/4 SILICON BRONZE HEX CAP SCREW

$1.29844/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.29844/ EA
260	$1.21704/ EA
1040	$1.08218/ EA
4680	$0.72113/ EA

5/16

1 1/2

Full

HHSB0310150

In Stock

$2.17909/EA

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5/16-18 X 1 1/2 SILICON BRONZE HEX CAP SCREW

$2.17909/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.17909/ EA
230	$2.04249/ EA
910	$1.81615/ EA
4070	$1.21023/ EA

5/16

Full

HHSB0310200

In Stock

$1.86984/EA

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5/16-18 X 2 SILICON BRONZE HEX CAP SCREW

$1.86984/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.86984/ EA
180	$1.75263/ EA
720	$1.55841/ EA
3240	$1.03848/ EA

3/8

1/2

Full

HHSB0370050

In Stock

$1.43504/EA

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3/8-16 X 1/2 SILICON BRONZE HEX CAP SCREW

$1.43504/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.43504/ EA
280	$1.34653/ EA
1110	$1.19479/ EA
4970	$0.80224/ EA

3/8

3/4

Full

HHSB0370075

3-5 Working Days

$1.33283/EA

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3/8-16 X 3/4 SILICON BRONZE HEX CAP SCREW

$1.33283/EA

Qty

3-5 Working Days

Product Detail

Quantity	Price
Quantity	Price
1	$1.33283/ EA
240	$1.25062/ EA
940	$1.10968/ EA
4190	$0.7451/ EA

3/8

Full

HHSB0370100

In Stock

$2.48355/EA

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3/8-16 X 1 SILICON BRONZE HEX CAP SCREW

$2.48355/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.48355/ EA
210	$2.33036/ EA
810	$2.06775/ EA
3630	$1.38839/ EA

3/8

1 1/4

Full

HHSB0370125

In Stock

$2.0648/EA

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3/8-16 X 1 1/4 SILICON BRONZE HEX CAP SCREW

$2.0648/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.0648/ EA
180	$1.93745/ EA
720	$1.71911/ EA
3210	$1.15429/ EA

3/8

1 1/2

Full

HHSB0370150

In Stock

$2.46725/EA

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3/8-16 X 1 1/2 SILICON BRONZE HEX CAP SCREW

$2.46725/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.46725/ EA
160	$2.31507/ EA
630	$2.05418/ EA
2800	$1.37928/ EA

3/8

1 3/4

Full

HHSB0370175

In Stock

$2.20537/EA

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3/8-16 X 1 3/4 SILICON BRONZE HEX CAP SCREW

$2.20537/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.20537/ EA
140	$2.06934/ EA
560	$1.83614/ EA
2480	$1.23288/ EA

3/8

Full

HHSB0370200

In Stock

$3.76986/EA

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3/8-16 X 2 SILICON BRONZE HEX CAP SCREW

$3.76986/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.76986/ EA
130	$3.53734/ EA
500	$3.1387/ EA
2230	$2.10748/ EA

3/8

2 1/2

Full

HHSB0370250

In Stock

$3.29055/EA

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3/8-16 X 2 1/2 SILICON BRONZE HEX CAP SCREW

$3.29055/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.29055/ EA
110	$3.08759/ EA
420	$2.73964/ EA
1850	$1.83953/ EA

3/8

Full

HHSB0370300

In Stock

$3.79747/EA

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3/8-16 X 3 SILICON BRONZE HEX CAP SCREW

$3.79747/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.79747/ EA
90	$3.56325/ EA
360	$3.16169/ EA
1580	$2.12292/ EA

3/8

3 1/2

Full

HHSB0370350

In Stock

$0.00778/EA

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3/8-16 X 3 1/2 SILICON BRONZE HEX CAP SCREW

$0.00778/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.00778/ EA
80	$0.0073/ EA
310	$0.00648/ EA
1380	$0.00435/ EA

3/8

Full

HHSB0370400

In Stock

$9.37378/EA

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3/8-16 X 4 SILICON BRONZE HEX CAP SCREW

$9.37378/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$9.37378/ EA
70	$8.79562/ EA
280	$7.8044/ EA
1230	$5.24027/ EA

3/8

4 1/2

Partial

HHSB0370450

3-5 Working Days

$2.10035/EA

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3/8-16 X 4 1/2 SILICON BRONZE HEX CAP SCREW

$2.10035/EA

Qty

3-5 Working Days

Product Detail

Quantity	Price
Quantity	Price
1	$2.10035/ EA
70	$1.9708/ EA
250	$1.7487/ EA
1110	$1.17417/ EA

3/8

Partial

HHSB0370500

In Stock

$0.00778/EA

See Quantity Discounts

3/8-16 X 5 SILICON BRONZE HEX CAP SCREW

$0.00778/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.00778/ EA
60	$0.0073/ EA
230	$0.00648/ EA
1000	$0.00435/ EA

7/16

Full

HHSB0430100

In Stock

$4.5638/EA

See Quantity Discounts

7/16-14 X 1 SILICON BRONZE HEX CAP SCREW

$4.5638/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.5638/ EA
150	$4.29125/ EA
600	$3.79313/ EA
2670	$2.59838/ EA

7/16

1 1/2

Full

HHSB0430150

In Stock

$5.83843/EA

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7/16-14 X 1 1/2 SILICON BRONZE HEX CAP SCREW

$5.83843/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$5.83843/ EA
120	$5.48975/ EA
470	$4.85252/ EA
2080	$3.32408/ EA

1/2

3/4

Full

HHSB0500075

In Stock

$2.89073/EA

See Quantity Discounts

1/2-13 X 3/4 SILICON BRONZE HEX CAP SCREW

$2.89073/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.89073/ EA
120	$2.72001/ EA
450	$2.40343/ EA
2020	$1.65585/ EA

1/2

Full

HHSB0500100

In Stock

$2.47891/EA

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1/2-13 X 1 SILICON BRONZE HEX CAP SCREW

$2.47891/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.47891/ EA
100	$2.33251/ EA
400	$2.06104/ EA
1780	$1.41996/ EA

1/2

1 1/4

Full

HHSB0500125

In Stock

$2.64457/EA

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1/2-13 X 1 1/4 SILICON BRONZE HEX CAP SCREW

$2.64457/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.64457/ EA
90	$2.48839/ EA
360	$2.19877/ EA
1580	$1.51485/ EA

1/2

1 1/2

Full

HHSB0500150

In Stock

$4.46322/EA

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1/2-13 X 1 1/2 SILICON BRONZE HEX CAP SCREW

$4.46322/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.46322/ EA
80	$4.19964/ EA
320	$3.71085/ EA
1420	$2.55659/ EA

1/2

1 3/4

Full

HHSB0500175

In Stock

$3.53932/EA

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1/2-13 X 1 3/4 SILICON BRONZE HEX CAP SCREW

$3.53932/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.53932/ EA
80	$3.33029/ EA
290	$2.94269/ EA
1270	$2.02737/ EA

1/2

Full

HHSB0500200

In Stock

$5.03064/EA

See Quantity Discounts

1/2-13 X 2 SILICON BRONZE HEX CAP SCREW

$5.03064/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$5.03064/ EA
70	$4.73354/ EA
260	$4.18262/ EA
1150	$2.88162/ EA

1/2

2 1/4

Full

HHSB0500225

In Stock

$6.09482/EA

See Quantity Discounts

1/2-13 X 2 1/4 SILICON BRONZE HEX CAP SCREW

$6.09482/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$6.09482/ EA
60	$5.73487/ EA
240	$5.0674/ EA
1050	$3.49119/ EA

1/2

2 1/2

Full

HHSB0500250

In Stock

$5.79023/EA

See Quantity Discounts

1/2-13 X 2 1/2 SILICON BRONZE HEX CAP SCREW

$5.79023/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$5.79023/ EA
60	$5.44827/ EA
220	$4.81416/ EA
970	$3.31672/ EA

1/2

2 3/4

Full

HHSB0500275

In Stock

$7.39432/EA

See Quantity Discounts

1/2-13 X 2 3/4 SILICON BRONZE HEX CAP SCREW

$7.39432/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$7.39432/ EA
50	$6.95763/ EA
200	$6.14785/ EA
890	$4.23557/ EA

1/2

Full

HHSB0500300

In Stock

$6.45042/EA

See Quantity Discounts

1/2-13 X 3 SILICON BRONZE HEX CAP SCREW

$6.45042/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$6.45042/ EA
50	$6.06948/ EA
190	$5.36306/ EA
830	$3.69489/ EA

1/2

3 1/2

Full

HHSB0500350

In Stock

$7.89175/EA

See Quantity Discounts

1/2-13 X 3 1/2 SILICON BRONZE HEX CAP SCREW

$7.89175/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$7.89175/ EA
50	$7.42568/ EA
170	$6.56142/ EA
730	$4.5205/ EA

1/2

Full

HHSB0500400

In Stock

$10.35028/EA

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1/2-13 X 4 SILICON BRONZE HEX CAP SCREW

$10.35028/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$10.35028/ EA
40	$9.73902/ EA
150	$8.60551/ EA
650	$5.92878/ EA

5/8

Full

HHSB0620100

In Stock

$5.23372/EA

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5/8-11 X 1 SILICON BRONZE HEX CAP SCREW

$5.23372/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$5.23372/ EA
60	$4.92963/ EA
220	$4.34976/ EA
980	$3.01997/ EA

5/8

1 1/2

Full

HHSB0620150

In Stock

$4.91775/EA

See Quantity Discounts

5/8-11 X 1 1/2 SILICON BRONZE HEX CAP SCREW

$4.91775/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.91775/ EA
50	$4.63202/ EA
190	$4.08715/ EA
820	$2.83765/ EA

5/8

1 3/4

Full

HHSB0620175

In Stock

$8.11343/EA

See Quantity Discounts

5/8-11 X 1 3/4 SILICON BRONZE HEX CAP SCREW

$8.11343/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$8.11343/ EA
50	$7.64203/ EA
170	$6.74309/ EA
750	$4.68163/ EA

5/8

Full

HHSB0620200

In Stock

$7.50764/EA

See Quantity Discounts

5/8-11 X 2 SILICON BRONZE HEX CAP SCREW

$7.50764/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$7.50764/ EA
40	$7.07143/ EA
160	$6.23962/ EA
690	$4.33207/ EA

ASME B18.2.1	Covers the complete general and dimensional data for multiple types of inch series square and hex bolts and screws.
ASME B1.1 UNC & UNF Class 2A	Specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads.