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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

3/8

Full

HHBR0250037

675 In Stock

$0.70613/EA

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1/4-20 X 3/8 Brass Hex Cap Screw

$0.70613/EA

Qty

675 In Stock

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Quantity	Price
Quantity	Price
1	$0.70613/EA
810	$0.66152/EA
3220	$0.58912/EA
14470	$0.3904/EA

1/4

1/2

Full

HHBR0250050

171 In Stock

$0.51287/EA

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1/4-20 X 1/2 Brass Hex Cap Screw

$0.51287/EA

Qty

171 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.51287/EA
730	$0.48047/EA
2890	$0.42789/EA
13000	$0.28355/EA

1/4

3/4

Full

HHBR0250075

351 In Stock

$0.69203/EA

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1/4-20 X 3/4 Brass Hex Cap Screw

$0.69203/EA

Qty

351 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.69203/EA
570	$0.64832/EA
2260	$0.57736/EA
10150	$0.3826/EA

1/4

Full

HHBR0250100

257 In Stock

$0.6989/EA

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1/4-20 X 1 Brass Hex Cap Screw

$0.6989/EA

Qty

257 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.6989/EA
490	$0.65475/EA
1960	$0.58309/EA
8810	$0.3864/EA

1/4

1 1/4

Partial

HHBR0250125

257 In Stock

$0.67949/EA

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1/4-20 X 1 1/4 Brass Hex Cap Screw

$0.67949/EA

Qty

257 In Stock

Product Detail

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

146 In Stock

$1.73821/EA

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1/4-20 X 1 1/2 Brass Hex Cap Screw

$1.73821/EA

Qty

146 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

80 In Stock

$1.92072/EA

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1/4-20 X 3 Brass Hex Cap Screw

$1.92072/EA

Qty

80 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

1/2

Full

HHBR0310050

3 In Stock

$0.64077/EA

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5/16-18 X 1/2 Brass Hex Cap Screw

$0.64077/EA

Qty

3 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.64077/EA
450	$0.6006/EA
1770	$0.53405/EA
7960	$0.35587/EA

5/16

3/4

Full

HHBR0310075

1024 In Stock

$0.74874/EA

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5/16-18 X 3/4 Brass Hex Cap Screw

$0.74874/EA

Qty

1024 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.74874/EA
350	$0.7018/EA
1390	$0.62403/EA
6240	$0.41584/EA

5/16

Full

HHBR0310100

14 In Stock

$3.36404/EA

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5/16-18 X 1 Brass Hex Cap Screw

$3.36404/EA

Qty

14 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.36404/EA
310	$3.15315/EA
1210	$2.80374/EA
5410	$1.86833/EA

5/16

1 1/4

Full

HHBR0310125

118 In Stock

$0.60072/EA

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5/16-18 X 1 1/4 Brass Hex Cap Screw

$0.60072/EA

Qty

118 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.60072/EA
270	$0.56306/EA
1050	$0.50067/EA
4700	$0.33363/EA

5/16

1 1/2

Partial

HHBR0310150

55 In Stock

$0.56067/EA

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5/16-18 X 1 1/2 Brass Hex Cap Screw

$0.56067/EA

Qty

55 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.56067/EA
230	$0.52553/EA
910	$0.46729/EA
4090	$0.31139/EA

3/8

1/2

Full

HHBR0370050

164 In Stock

$1.06655/EA

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3/8-16 X 1/2 Brass Hex Cap Screw

$1.06655/EA

Qty

164 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.06655/EA
280	$1.00077/EA
1120	$0.88799/EA
5000	$0.59624/EA

3/8

3/4

Full

HHBR0370075

188 In Stock

$1.28355/EA

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3/8-16 X 3/4 Brass Hex Cap Screw

$1.28355/EA

Qty

188 In Stock

Product Detail

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

3/8

Full

HHBR0370100

78 In Stock

$1.61816/EA

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3/8-16 X 1 Brass Hex Cap Screw

$1.61816/EA

Qty

78 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.61816/EA
210	$1.51836/EA
820	$1.34725/EA
3650	$0.90461/EA

3/8

1 1/4

Full

HHBR0370125

49 In Stock

$1.54788/EA

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3/8-16 X 1 1/4 Brass Hex Cap Screw

$1.54788/EA

Qty

49 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.54788/EA
180	$1.45241/EA
720	$1.28873/EA
3230	$0.86532/EA

3/8

1 1/2

Full

HHBR0370150

138 In Stock

$2.22839/EA

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3/8-16 X 1 1/2 Brass Hex Cap Screw

$2.22839/EA

Qty

138 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.22839/EA
160	$2.09095/EA
630	$1.85531/EA
2820	$1.24575/EA

3/8

1 3/4

Partial

HHBR0370175

42 In Stock

$2.75418/EA

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3/8-16 X 1 3/4 Brass Hex Cap Screw

$2.75418/EA

Qty

42 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.75418/EA
140	$2.58431/EA
560	$2.29307/EA
2500	$1.53968/EA

3/8

Partial

HHBR0370200

298 In Stock

$2.35107/EA

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3/8-16 X 2 Brass Hex Cap Screw

$2.35107/EA

Qty

298 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$2.35107/EA
130	$2.20606/EA
500	$1.95745/EA
2240	$1.31433/EA

1/2

3/4

Full

HHBR0500075

115 In Stock

$2.87697/EA

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1/2-13 X 3/4 Brass Hex Cap Screw

$2.87697/EA

Qty

115 In Stock

Product Detail

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

1/2

Full

HHBR0500100

116 In Stock

$3.52123/EA

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1/2-13 X 1 Brass Hex Cap Screw

$3.52123/EA

Qty

116 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.52123/EA
100	$3.31327/EA
400	$2.92765/EA
1790	$2.01701/EA

1/2

1 1/4

Full

HHBR0500125

79 In Stock

$3.06417/EA

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1/2-13 X 1 1/4 Brass Hex Cap Screw

$3.06417/EA

Qty

79 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.06417/EA
90	$2.88321/EA
360	$2.54764/EA
1590	$1.7552/EA

1/2

1 1/2

Full

HHBR0500150

106 In Stock

$4.00413/EA

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1/2-13 X 1 1/2 Brass Hex Cap Screw

$4.00413/EA

Qty

106 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.00413/EA
80	$3.76765/EA
320	$3.32914/EA
1430	$2.29362/EA

1/2

1 3/4

Full

HHBR0500175

28 In Stock

$1.51622/EA

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1/2-13 X 1 3/4 Brass Hex Cap Screw

$1.51622/EA

Qty

28 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$1.51622/EA
80	$1.42668/EA
290	$1.26063/EA
1270	$0.86851/EA

1/2

Partial

HHBR0500200

439 In Stock

$6.47172/EA

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1/2-13 X 2 Brass Hex Cap Screw

$6.47172/EA

Qty

439 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$6.47172/EA
70	$6.08952/EA
260	$5.38077/EA
1150	$3.70709/EA

1/2

2 1/4

Partial

HHBR0500225

66 In Stock

$8.73135/EA

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1/2-13 X 2 1/4 Brass Hex Cap Screw

$8.73135/EA

Qty

66 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$8.73135/EA
60	$8.21569/EA
240	$7.25948/EA
1050	$5.00143/EA

1/2

2 1/2

Partial

HHBR0500250

35 In Stock

$3.54372/EA

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1/2-13 X 2 1/2 Brass Hex Cap Screw

$3.54372/EA

Qty

35 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$3.54372/EA
60	$3.33444/EA
220	$2.94635/EA
970	$2.02989/EA

5/8

1 3/4

Full

HHBR0620175

20 In Stock

$10.5706/EA

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5/8-11 X 1 3/4 Brass Hex Cap Screw

$10.5706/EA

Qty

20 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$10.5706/EA
50	$9.95642/EA
170	$8.78525/EA
760	$6.09947/EA

5/8

2 1/2

Partial

HHBR0620250

2 In Stock

$16.91227/EA

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5/8-11 X 2 1/2 Brass Hex Cap Screw

$16.91227/EA

Qty

2 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$16.91227/EA
40	$15.92963/EA
140	$14.05582/EA
590	$9.75875/EA

5/8

2 3/4

Partial

HHBR0620275

20 In Stock

$20.83619/EA

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5/8-11 X 2 3/4 Brass Hex Cap Screw

$20.83619/EA

Qty

20 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$20.83619/EA
40	$19.62556/EA
130	$17.317/EA
550	$12.02294/EA

5/8

Partial

HHBR0620300

4 In Stock

$14.17923/EA

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5/8-11 X 3 Brass Hex Cap Screw

$14.17923/EA

Qty

4 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$14.17923/EA
30	$13.35539/EA
120	$11.78439/EA
520	$8.18173/EA

5/8

3 1/2

Partial

HHBR0620350

123 In Stock

$4.62646/EA

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5/8-11 X 3 1/2 Brass Hex Cap Screw

$4.62646/EA

Qty

123 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$4.62646/EA
30	$4.35765/EA
110	$3.84506/EA
500	$2.66957/EA

5/8

Partial

HHBR0620400

17 In Stock

$8.39616/EA

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5/8-11 X 4 Brass Hex Cap Screw

$8.39616/EA

Qty

17 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$8.39616/EA
25	$7.90833/EA
100	$6.97807/EA
500	$4.84477/EA

5/8

4 1/2

Partial

HHBR0620450

10 In Stock

$33.756/EA

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5/8-11 X 4 1/2 Brass Hex Cap Screw

$33.756/EA

Qty

10 In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$33.756/EA
25	$31.79471/EA
90	$28.05469/EA
500	$19.47795/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.