Hex Bolt

Size: 3/8″ – 1-1/2″
Material: Special Alloy, Super Duplex Stainless Steel, Stainless Steel, Carbon Steel, Titanium
Grade: ASTM A563

PRODUCT DETAIL
Material

Hex bolts (six sided heads) are the industry standard for fasteners with forged heads. ASTM A307 grade A bolts, all SAE hex bolts, and several other common specifications require a standard (finished) hex head. For specifications such as A307 grade B, A325 and A490 that require a heavy hex pattern, refer to dimensional tolerances for heavy hex bolts or structural bolts.

Diameters: 3/8″ – 1-1/2″
Grade: ASTM A307 Grade A, F1554 Grade 36
Lengths: 30″ maximum
Origin: Domestic and import
Finish: Plain and hot dip galvanized

Standard Thread Length

Bolt lengths ≤ 6″: Thread length = (2 X diameter) + 1/4″
Bolt lengths > 6″: Thread length = (2 X diameter) + 1/2″
Note: Most stock hex bolts 10″ and longer will have 6″ of thread.

Stud Bolt Specification & Standard

Various ASME standards are used for stud bolts and nuts to manufacturing bolting material. List of such standard is given below.

Diameter and Lengths of the stud and bolt are covered in ASME B16.5 & B16.47
ASME B1.1 Unified Inch Screw Threads (Cores and Fine thread series- normally Cores thread series is used for stud used in piping)
ASME B18.2.1 for Square and Hex Bolts and Screws
ASME B18.2.2 Square and Hex Nuts
ASME B18.21.1 Lock Washers
ASME B18.22.1 Plain Washers

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China Hex bolts manufacturer Acero supplies Hex bolts in kinds of materials such as carbon steel, stainless steel, alloy steel, titanium, etc.

Hex Bolt Dimensions

Bolt Diameter	D	F			C		H
	Body Diameter	Width Across Flats			Width Across Corners		Height
	Max	Basic	Max	Min	Max	Min	Basic	Max	Min
1⁄2	0.515	3⁄4	0.750	0.725	0.866	0.826	11⁄32	0.364	0.302
5⁄8	0.642	15⁄16	0.938	0.906	1.083	1.033	27⁄64	0.444	0.378
3⁄4	0.768	11⁄8	1.125	1.088	1.299	1.240	1⁄2	0.524	0.455
7⁄8	0.895	15⁄16	1.312	1.269	1.516	1.447	37⁄64	0.604	0.531
1	1.022	11⁄2	1.500	1.450	1.732	1.653	43⁄64	0.700	0.591
11⁄8	1.149	111⁄16	1.688	1.631	1.949	1.859	3⁄4	0.780	0.658
11⁄4	1.277	17⁄8	1.875	1.812	2.165	2.066	27⁄32	0.876	0.749
13⁄8	1.404	21⁄16	2.062	1.994	2.382	2.273	29⁄32	0.940	0.810
11⁄2	1.531	21⁄4	2.250	2.175	2.598	2.480	1	1.036	0.902
15⁄8	1.658	27⁄16	2.438	2.356	2.815	2.616	13⁄32	1.116	0.978
13⁄4	1.785	2-5/8	2.625	2.538	3.031	2.893	15⁄32	1.196	1.054
17⁄8	1.912	213⁄16	2.812	2.719	3.248	3.099	11⁄4	1.276	1.130
2	2.039	3	3.000	2.900	3.464	3.306	111⁄32	1.388	1.175
21⁄4	2.305	33⁄8	3.375	3.262	3.897	3.719	11⁄2	1.548	1.327
21⁄2	2.559	33⁄4	3.750	3.625	4.330	4.133	121⁄32	1.708	1.479
Dimensions per ASME B18.2.1 2010

Applications

Hex bolts can be used for many different applications that include fastening wood, steel, and other construction materials for projects such as docks, bridges, highway structures, and buildings. Hex bolts with forged heads are also commonly used as headed anchor bolts.

Manufacturing

Portland Bolt manufactures hex bolts from 1/2″ diameter through 2-1/2″ diameter in most ASTM, AASHTO, and SAE specifications. Special tooling can be created to produce nonstandard head dimensions or bolt heads with your company’s name and/or logo.

Cutting

The first step in the manufacturing process of any fastener, regardless of its final configuration, is cutting the bolt to length. Raw material in the form of round bar ranging from 12′ to 40′ in length is either saw cut or sheared.

Band saws use saw blades to cut through the steel round bar. On the other hand, shearing equipment functions like a guillotine, “chopping” the raw material. During the shearing operation, the material is automatically run against a stop and then sheared to length. This quick process is an extremely efficient method of cutting material and will translate into more cost effective product produced in a more time efficient manner.

Portland Bolt implements systems to ensure heat lot traceability on all raw material brought into the facility and heat numbers are recorded when the material is cut. This insures cutting of correct materials and proper documentation of the finished product.

Quantity	Equipment	Function
2	Peddinghaus Shears	Capable of shearing up to, and including, 2″ diameter round bar with a maximum length of 100″.
2	HYDMECH Band saws	Band saws are used for cutting large diameter round bar and pipe sleeves. Certain grades of heat treated round bar, small quantities, lengths which exceed shearing limitations, and headed blanks will be cut using band saws.

Heading

Portland Bolt uses National Upsetters to hot forge heads onto bolts. During the forging process, the end of the round bar is heated via an induction process and placed into the upsetter where a plunger compresses the heated steel to form the head of the bolt. Calculations are made to determine the amount of round bar which will be reshaped to create a given head style in a particular diameter, and this amount of material is added to the cut-length at the beginning of the manufacturing process. Heads can be forged onto fasteners before or after the threading process. Upsetters have an advantage over presses in that there is no length limitation with regard to bolts produced on an upsetter.

This equipment is capable of forging heads onto bolts from 1/2″ – 2-1/2″ diameter. Common head stylesinclude hex, heavy hex, square, carriage, guardrail, timber/dome head, and countersunk. Many other head styles are currently available and we are more than willing to create new tooling for your custom requirements. We also offer the option of producing custom product with your company name and/or logo forged into the head. We forge a variety of steels including low carbon, medium carbon, alloy, stainless, and brass.

Threading

More threading options means faster delivery

With three roll threaders and fourteen cut threaders, Portland Bolt can thread fasteners for all kinds of projects. Our experienced operators ensure you are delivered quality threaded product that won’t gall or resist a nut, even after galvanizing. Over a century of threading fasteners has resulted in two efficient and cost-effective threading methods capable of handling steel up to 6” in diameter.

Roll Threading (through 1” diameter)

Roll threading is an extrusion process in which steel round bar is forced between two dies to form the threaded portion of a fastener, instead of being removed as in cut threading. In this process, a bolt is manufactured from a reduced diameter round bar. For example, a 1″ diameter bolt is manufactured from .912″ diameter round bar. This “pitch diameter” steel is approximately the midpoint between the major diameter (peaks) and minor diameter (valleys) of the threads. The bolt is “rolled” through a set of threading dies which displace the steel and forms the threads. The end result is a fastener with a full 1″ diameter threaded portion but a reduced body diameter (.912″). Roll threading is an extremely efficient process and often results in significant cost savings. Therefore, Portland Bolt will roll threads whenever possible. Learn more about the benefits and drawbacks of roll threading versus cut threading.

Cut Threading (through 6” diameter)

Cut threading is a process by which steel is cut away from a round bar of steel to form the threads. A 1″ diameter bolt, for example, is produced by cutting threads into a full 1″ diameter body of the bolt. Cut threading is a much more labor-intensive process but provides more flexibility with regard to longer thread lengths and larger diameters.

Quantity	Equipment	Function
2	Waterbury Farrel Flat Die Roll Threaders	A flat die roll threader that produces threads through an extrusion process. In which material is forced between two dies to create threads. Threads produced on this equipment are limited to 1″ diameter and 8″ in length. Flat die roll threading is the most efficient manufacturing process for producing threads.
1	Vertical Flat Die Roll Threader	This roll threader acquired during our purchase of Northwest Bolt in 1995, provides us with unmatched capabilities in the industry. It allows us to produce rolled threads with the same dimensional criteria as the Waterbury Farrels, but in unlimited lengths. Tie rods, sag rods, and float rods for the marine industry are products frequently produced on this equipment.
14	Landis Cut Threaders	These single and dual spindle threaders allow Portland Bolt to cut threads on fasteners from 3/8″ diameter through 6″ diameter. With so many machine hours available, no order is too large and no lead time is too short.

Hot-Dip Galvanizing

Galvanizing offers an exceptional corrosion resistant zinc coating for steel fasteners. The process provides durability, long service life, and is economical in comparison to other coating options. Portland Bolt’s unique system developed specifically for threaded fasteners ensures quality threads and a trouble-free nut fit.

Hot-dip galvanizing offers long-term protection for fasteners and other steel products.
Parts are evenly coated for complete coverage.
Expected service life can exceed 30 years.
Low life-cycle cost makes galvanizing an economical method of protecting steel.
Zinc bonds metallurgically to steel providing permanent protection.