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Brass Hex Cap Screw

Brass hex head cap screws are manufactured from an alloy of copper and zinc. Dimensional specifications are governed by ASME B18.2.1. There are no grade markings on Brass hex cap screws. Brass fasteners are commonly used by electrical and communications industries, builders hardware and some marine applications. Brass hex head cap screws are electrically conductive, non-magnetic, and have good corrosion resistance.

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Governing Standards
Dimensional Specifications

Dimensional Specifications

Dimensional SpecificationsBrass

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″

Brass Hex Cap Screw

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Diameter Thread Pitch Length Threading Item # Availability Price Quantity UOM

1/4

3/4

Full

HHBR0250075

In Stock

$0.64986/EA

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1/4-20 X 3/4 BRASS HEX CAP SCREW

$0.64986/EA

Qty

In Stock

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Quantity	Price
Quantity	Price
1	$0.64986/EA
570	$0.60881/EA
2260	$0.54218/EA
10150	$0.35929/EA

1/4

1 1/4

Partial

HHBR0250125

In Stock

$0.67949/EA

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1/4-20 X 1 1/4 BRASS HEX CAP SCREW

$0.67949/EA

Qty

In Stock

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Quantity	Price
Quantity	Price
1	$0.67949/EA
420	$0.63656/EA
1660	$0.56689/EA
7470	$0.37567/EA

1/4

1 1/2

Partial

HHBR0250150

In Stock

$1.73821/EA

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1/4-20 X 1 1/2 BRASS HEX CAP SCREW

$1.73821/EA

Qty

In Stock

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Quantity	Price
Quantity	Price
1	$1.73821/EA
370	$1.62841/EA
1450	$1.45019/EA
6500	$0.961/EA

1/4

Partial

HHBR0250300

In Stock

$1.92072/EA

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1/4-20 X 3 BRASS HEX CAP SCREW

$1.92072/EA

Qty

In Stock

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Quantity	Price
Quantity	Price
1	$1.92072/EA
210	$1.79939/EA
810	$1.60245/EA
3640	$1.06191/EA

5/16

3/4

Full

HHBR0310075

In Stock

$0.60056/EA

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5/16-18 X 3/4 BRASS HEX CAP SCREW

$0.60056/EA

Qty

In Stock

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Quantity	Price
Quantity	Price
1	$0.60056/EA
350	$0.56291/EA
1390	$0.50053/EA
6240	$0.33354/EA

3/8

3/4

Full

HHBR0370075

In Stock

$1.28355/EA

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3/8-16 X 3/4 BRASS HEX CAP SCREW

$1.28355/EA

Qty

In Stock

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Quantity	Price
Quantity	Price
1	$1.28355/EA
240	$1.20438/EA
940	$1.06865/EA
4220	$0.71755/EA

1/2

3/4

Full

HHBR0500075

In Stock

$2.87697/EA

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1/2-13 X 3/4 BRASS HEX CAP SCREW

$2.87697/EA

Qty

In Stock

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Quantity	Price
Quantity	Price
1	$2.87697/EA
120	$2.70707/EA
450	$2.392/EA
2030	$1.64797/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.

Brass Hex Cap Screw

Technical Data

Governing Standards

Governing StandardsBrass

Dimensional Specifications

Dimensional SpecificationsBrass

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Body Diameter

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Length

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Thread Length

Diameter

Width Across Flats

Height of Head

Width Across Points

1/4-20 X 3/4 BRASS HEX CAP SCREW

1/4-20 X 1 1/4 BRASS HEX CAP SCREW

1/4-20 X 1 1/2 BRASS HEX CAP SCREW

1/4-20 X 3 BRASS HEX CAP SCREW

5/16-18 X 3/4 BRASS HEX CAP SCREW

3/8-16 X 3/4 BRASS HEX CAP SCREW

1/2-13 X 3/4 BRASS HEX CAP SCREW