Industrial Bolts, Industrial Fasteners, Industrial Rods from EFG

EFI provides extensive fastener engineering, offshore purchasing and quality capabilities. EFI is staffed by sales engineers and import professionals with considerable background in industrial fasteners.

Leading manufacturer of cold headed fasteners, tight tolerances and multiple secondary operations for precision components used in heavy-duty diesel engines, transmissions and other demanding fastener applications.

Domestic quality manufacturing of small diameter fasteners and machine screws (diameters from 4-40 to 1/2" and lengths to 5"). Includes Lo-Driv® and Grip-Lite™ screws and other standard, semi-standard and specialty fastener solutions.

Manufacturer of small diameter, long length fasteners. Specializing in long length, small diameter headed and threaded fasteners through 52" long and 1/2" diameter. Superior straightness in plated parts.

Leader of cold-formed fasteners (diameters from 1/4" to 5/8" and lengths to 3") and industry standard and semi-standard fasteners. Efficient manufacturing processes for medium to high-volumes and provides in-house tooling.

Specializes in electro deposited zinc and zinc phosphate coatings for fastener manufacturing, stamping, fabrication and metal forming industries.

Industrial Bolts and Rod Diameters

Industrial bolts, industrial fasteners and industrial rods are available from Elgin Fastener Group for a variety of applications and industries. Multiple industrial rod and bolt diameters are available, see the chart below for the full listing.

Steel Wire Gauge No.	Common Fractions	Decimal	Millimeters
10/0	19/32	.593	15.08
8/0	17/32	.531	13.49
7/0	1/2	.500	12.70
6/0	15/32	.490 .469	11.72 11.92
5/0	7/16	.462 .437	11.72 11.11
4/0	3/8	.394 .375	10.00 9.52
3/0	11/32	.363 .343	9.21 8.73
2/0	5/16	.331 .312	8.41 7.94
1/0	19/64	.307 .297	7.79 7.54
1	9/32	.283 .281	7.19
2	1/4	.263 .250	6.67
3	.	.244	6.19
4	7/32	.225 .219	5.72
5	.	.207	5.26
6	3/16	.192 .188	4.88
7	.	.177	4.50
8	5/32	.162 .156	4.12
9	.	.148	3.77
10	1/8	.135 .125	3.43
11	.	.121	3.06

Torque Tensioning
Screw Point Types
Pilot Hole Sizes
Bolt & Screw Head Types
Weights per Thousand
Unified External Screw Threads
Rod & Bolt Diameters
Metric Conversions
Hole Sizes for Die Casting
Material Strength
Drive Tool Sizes
Hardness Conversions

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Companies of Elgin National Industries, Inc.