Silicon Bronze Screws | McMaster-Carr

	Material Material

Brass

Bronze

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

0-80
1-72
2-56
3-48
3-56
4-40
4-48
5-40
6-32
6-40
8-32
8-36
10-24
10-32
12-24
1/4"-20
1/4"-28
5/16"-18
5/16"-24
3/8"-16
3/8"-24
7/16"-14
1/2"-13
1/2"-20
5/8"-11
3/4"-10
M2
M2.5
M3
M4
M5
M6
M8
M10
M12

	Thread Type Thread Type

UNC

UNF

Metric

	Length Length

	Head Type Head Type


Hex	Flat

Rounded	Socket

Oval

	Drive Style Drive Style


External Hex	Hex

Slotted	Phillips

	Threading Threading

	Fully Threaded
	Partially Threaded

	Head Diameter Head Diameter

	Head Height Head Height

	Thread Spacing Thread Spacing

Coarse

Fine

	Tensile Strength Tensile Strength

50,000 psi

70,000 psi

Not Rated

	Hardness Hardness

	Thread Fit Thread Fit

Class 2A

Class 3A

Class 6g

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Specifications Met Specifications Met

ASME

DIN

ISO

	Flat Head Profile Flat Head Profile


Standard	Undercut

	Countersink Angle Countersink Angle

82°

90°

	Drive Size Drive Size

	Rounded Head Style Rounded Head Style


Button	Carriage

	Thread Pitch Thread Pitch

	Head Width Head Width

	Rounded Head Profile Rounded Head Profile

Standard

Wide

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Screws and Bolts

Bronze Hex Head Screws

Bronze screws are 30% stronger than brass screws and provide more corrosion resistance to salt water, gases, and sewage. They are nonmagnetic and electrically conductive.

Brass Slotted Flat Head Screws

Brass screws are electrically conductive, nonmagnetic, and have good corrosion resistance.

Metric Brass Slotted Flat Head Screws

These metric brass screws are electrically conductive, nonmagnetic, and have good corrosion resistance.

Brass Slotted Oval Head Screws

Brass screws are electrically conductive, nonmagnetic, and have good corrosion resistance.

Metric Brass Slotted Oval Head Screws

These metric brass screws are electrically conductive, nonmagnetic, and have good corrosion resistance.

Brass Phillips Flat Head Screws

Brass screws are electrically conductive, nonmagnetic, and have good corrosion resistance.

Metric Brass Phillips Flat Head Screws

These metric brass screws are electrically conductive, nonmagnetic, and have good corrosion resistance.

Brass Hex Drive Flat Head Screws

Brass screws are electrically conductive, nonmagnetic, and have good corrosion resistance.

Metric Brass Hex Drive Flat Head Screws

These metric brass screws are electrically conductive, nonmagnetic, and have good corrosion resistance.

Brass Button Head Hex Drive Screws

Brass button head screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

Metric Brass Button Head Hex Drive Screws

Made from brass, these metric button head screws are corrosion resistant in wet environments, nonmagnetic, and electrically conductive.

Brass Socket Head Screws

Brass screws are electrically conductive, nonmagnetic, and have good corrosion resistance.

Bronze Socket Head Screws

Bronze screws are about 40% stronger than brass screws and provide more corrosion resistance to salt water, gases, and sewage. They are nonmagnetic and electrically conductive.

Bronze Square-Neck Carriage Bolts

Bronze bolts are resistant to salt water, electrically conductive, and nonmagnetic. Carriage bolts have a smooth, rounded head for a finished look. The square neck keeps these bolts from turning when tightening a nut.