Recommended Nuts and Washers

15 Mar.,2024

 

Grade Identification Size Inches Recommended A563 Nut Washer Plain Finish Hot-Dip or Mechanical Zinc Coated Grade Style Grade Style 36 1⁄2 – 11⁄2 A Hex A Hex F436 15⁄8 – 4 A Heavy Hex A Heavy Hex 55 1⁄2 – 11⁄2 A Hex A Heavy Hex F436 15⁄8 – 4 A Heavy Hex A Heavy Hex 105 1⁄2 – 11⁄2 D1 Heavy Hex DH2 Heavy Hex F436 15⁄8 – 3 DH2 Heavy Hex DH2 Heavy Hex

Nuts

A563 Heavy Hex Nuts and Hex Nuts

The required nut specification for all F1554 anchor bolts is ASTM A563, which is the general nut specification for structural and mechanical applications. Depending on the diameter and finish of the anchor bolt, ASTM requires an A563 hex or heavy hex pattern nut. Heavy hex pattern nuts are slightly thicker and wider than hex nuts. The most common ASTM A563 grades found in the marketplace that are used with F1554 anchor bolts are A563 Grade A and A563 Grade DH. Low strength ASTM A563 Grade A nuts are found commonly in both hex and heavy hex patterns and are the recommend nut for both F1554 Grade 36 and F1554 Grade 55. A563 Grade DH high strength heavy hex nuts are required for use with F1554 Grade 105 high strength anchor bolts, however, A563 Grade DH nuts are often not available in certain diameters, finishes, or domestically manufactured. In these cases an A194 Grade 2H heavy hex nut can be substituted at any time to reduce cost. This substitution is specifically allowed at any time per ASTM A563 and is stated in the notes under Table 3 Mechanical Requirements in ASTM A563. A563 Grade DH nuts and A194 Grade 2H nuts can always be used with all three grades of F1554.

A563 Grades

A Carbon steel, hex or heavy hex B Carbon steel, hex or heavy hex C Carbon steel, quenched and tempered, heavy hex D Carbon steel, quenched and tempered, heavy hex DH Carbon steel, quenched and tempered, heavy hex C3 Weathering steel, quenched and tempered, heavy hex DH3 Weathering steel, quenched and tempered, heavy hex

A563 Mechanical Properties

Grade Style Size, in. Proof Load, ksi Hardness, HBN Plain Galvanized A Hex 1/4 - 1-1/2 90 68 116 - 302 Heavy Hex 1/4 - 4 100 75 116 - 302 B Heavy Hex 1/4 - 1 133 100 121 - 302 Heavy Hex 1-1/8 - 1-1/2 116 87 121 - 302 C / C3 Heavy Hex 1/4 - 4 144 144 143 - 352 D Heavy Hex 1/4 - 4 150 150 248 - 352 DH / DH3 Heavy Hex 1/4 - 4 175 150 248 - 352 For UNC, 8UN, 6UN, and Coarse Pitch Threads

A563 Chemical Properties

Element Grades O, A, B, C D** DH** Carbon 0.55% max 0.55% max 0.20 - 0.55% Manganese, min 0.30% 0.60% Phosphorus, max 0.12% 0.04% 0.04% Sulfur, max 0.15%* 0.05% 0.05% * For grades O, A and B a sulfur content of 0.23% max is acceptable with the purchasers approval ** For grades D and DH a sulfur content of 0.05 - 0.15% is acceptable provided the manganese is 1.35% min Element Classes for Grade C3* DH3 A B C D E F N Carbon 0.33 - 0.40% 0.38 - 0.48% 0.15 - 0.25% 0.15 - 0.25% 0.20 - 0.25% 0.20 - 0.25% 0.20 - 0.53% Manganese 0.90 - 1.20% 0.70 - 0.90% 0.80 - 1.35% 0.40 - 1.20% 0.60 - 1.00% 0.90 - 1.20% 0.40% min Phosphorus 0.040% max 0.06 - 0.12% 0.035% max 0.040% max 0.040% max 0.040% max 0.07 - 0.15% 0.046% max Sulfur, max 0.050% 0.050% 0.040% 0.050% 0.040% 0.040% 0.050% 0.050% Silicon 0.15 - 0.35% 0.30 - 0.50% 0.15 - 0.35% 0.25 - 0.50% 0.15 - 0.35% 0.15 - 0.35% 0.20 - 0.90% Copper 0.25 - 0.45% 0.20 - 0.40% 0.20 - 0.50% 0.30 - 0.50% 0.30 - 0.60% 0.20 - 0.40% 0.25 - 0.55% 0.20% min Nickel 0.25 - 0.45% 0.50 - 0.80% 0.25 - 0.50% 0.50 - 0.80% 0.30 - 0.60% 0.20 - 0.40% 1.00% max 0.20% min** Chromium 0.45 - 0.65% 0.50 - 0.75% 0.30 - 0.50% 0.50 - 1.00% 0.60 - 0.90% 0.45 - 0.65% 0.30 - 1.25% 0.45% min Vanadium 0.020% min Molybdenum 0.06% max 0.10% max 0.15% min** Titanium 0.05% max * Selection of a class shall be at the option of the manufacturer ** Nickel or Molybdenum may be used.

A194 Grade 2H Heavy Hex Nuts

Like A563 Grade DH, ASTM A194 Grade 2H is a high-strength nut with virtually identical mechanical requirements, but with additional heat treating and testing performed. This added heat treating and testing are required to ensure the nut performs at high temperatures. ASTM A194 is a high temperature and/or pressure bolting specification that is often used in piping or mechanical applications. Due to the mass-production of these nuts for these applications, A194 Grade 2H nuts are often widely available and are economical in certain diameters and finishes making them an excellent substitution for any A563 nut. In particular, A194 Grade 2H nuts are substituted and commonly used in place of A563 Grade DH heavy hex nuts.

A194 Chemical Properties

Element 2, 2H, and 2HM 4 7 and 7M (AISI 4140) 8 (AISI 304) 8M (AISI 316) Carbon 0.40% min 0.40 - 0.50% 0.37 - 0.49% 0.08% max 0.08% max Manganese 1.00% max 0.70 - 0.90% 0.65 - 1.10% 2.00% max 2.00% max Phosphorus, max 0.040% 0.035% 0.035% 0.045% 0.045% Sulfur, max 0.050% 0.040% 0.040% 0.030% 0.030% Silicon 0.40% max 0.15 - 0.35% 0.15 - 0.35% 1.00% max 1.00% max Chromium 0.75 - 1.20% 18.0 - 20.0% 16.0 - 18.0% Nickel 8.0 - 11.0% 10.0 - 14.0% Molybdenum 0.20 - 0.30% 0.15 - 0.25% 2.00 - 3.00%

Heavy Hex Nut Dimensions

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Bolt Diam. F C H Weight
(lbs.) Width Across Flats Width Across Corners Thickness Basic Max Min Max Min Basic Max Min 1⁄2 7⁄8 0.875 0.850 1.010 0.969 31⁄64 0.504 0.464 0.07 5⁄8 11⁄16 1.062 1.031 1.227 1.175 39⁄64 0.631 0.587 0.12 3⁄4 11⁄4 1.250 1.212 1.443 1.382 47⁄64 0.758 0.710 0.20 7⁄8 17⁄16 1.438 1.394 1.660 1.589 55⁄64 0.885 0.833 0.30 1 15⁄8 1.625 1.575 1.876 1.796 63⁄64 1.012 0.956 0.43 11⁄8 113⁄16 1.812 1.756 2.093 2.002 17⁄64 1.139 1.079 0.59 11⁄4 2 2.000 1.938 2.309 2.209 17⁄32 1.251 1.187 0.79 13⁄8 23⁄16 2.188 2.119 2.526 2.416 111⁄32 1.378 1.310 1.02 11⁄2 23⁄8 2.375 2.300 2.742 2.622 115⁄32 1.505 1.433 1.31 15⁄8 29⁄16 2.562 2.481 2.959 2.828 119⁄32 1.632 1.556 1.62 13⁄4 23⁄4 2.750 2.662 3.175 3.035 123⁄32 1.759 1.679 2.04 17⁄8 215⁄16 2.938 2.844 3.392 3.242 127⁄32 1.886 1.802 2.41 2 31⁄8 3.125 3.025 3.608 3.449 131⁄32 2.013 1.925 2.99 21⁄4 31⁄2 3.500 3.388 4.041 3.862 213⁄64 2.251 2.155 4.19 21⁄2 37⁄8 3.875 3.750 4.474 4.275 229⁄64 2.505 2.401 5.64 23⁄4 41⁄4 4.250 4.112 4.907 4.688 245⁄64 2.759 2.647 7.38 3 45⁄8 4.625 4.475 5.340 5.102 261⁄64 3.013 2.893 9.50 31⁄4 5 5.000 4.838 5.774 5.515 33⁄16 3.252 3.124 11.94 31⁄2 53⁄8 5.375 5.200 6.207 5.928 37⁄16 3.506 3.370 15.26 33⁄4 53⁄4 5.750 5.562 6.640 6.341 311⁄16 3.760 3.616 18.12 4 61⁄8 6.125 5.925 7.073 6.755 315⁄16 4.014 3.862 21.80

Dimensions per ASME B18.2.2 1987 (1999)

Hex Nut Dimensions

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Nominal Size F C H Part Numbers Width Across Flats Width Across Corners Thickness Domestic Import Basic Max Min Max Min Basic Max Min Plain Galvanized Plain Galvanized 1⁄2 3⁄4 0.750 0.736 0.866 0.840 7⁄16 0.448 0.427 16270 16271 11701 11702 5⁄8 15⁄16 0.938 0.922 1.083 1.051 35⁄64 0.559 0.535 16272 16273 11703 11704 3⁄4 11⁄8 1.125 1.088 1.299 1.240 41⁄64 0.665 0.617 16274 16275 11705 11706 7⁄8 15⁄16 1.312 1.269 1.516 1.447 3⁄4 0.776 0.724 16276 16277 11707 11708 1 11⁄2 1.500 1.450 1.732 1.653 55⁄64 0.887 0.831 16278 16279 11709 11710 11⁄8 111⁄16 1.688 1.631 1.949 1.859 31⁄32 0.999 0.939 16280 16281 11711 11712 11⁄4 17⁄8 1.875 1.812 2.165 2.066 11⁄16 1.094 1.030 16282 16283 11713 11714 13⁄8 21⁄16 2.062 1.994 2.382 2.273 111⁄64 1.206 1.138 - - 11715 11716 11⁄2 21⁄4 2.250 2.175 2.598 2.480 19⁄32 1.317 1.245 16286 16287 11717 11718

Dimensions per ASME B18.2.2 1987 (1999)

Washers

F436 Washers

Unless otherwise specified ASTM F1554 requires a F436 type 1 hardened washer. This washer is a common mass-produced washer typically used with structural bolts and high-strength bolts of many different specifications. Unlike the general purpose and low grade F844 washer, the F436 washer is heat treated to a required hardness range and is designed for mechanical and structural use. The dimensions below show the standard dimensions for stock F436 washers that are economical and readily available. Custom F436 washers that can be thicker, square, or much larger can be custom manufactured, but at much higher cost and longer lead time.

F436 Mechanical Properties

Plain Finish Hot Dip Galvanized Rockwell Hardness 38 to 45 HRC Rockwell Hardness 26 to 45 HRC

F436 Chemical Requirements

Element Type 1 Type 3 Phosphorous, max 0.040% 0.040% Sulfur, max 0.050% 0.050% Silicon - 0.15 - 0.35% Chromium - 0.45 - 0.65% Nickel - 0.25 - 0.45% Copper - 0.25 - 0.45% Weathering steel washer may also be made from any of the steels listed in Table 2 of A325.

Hardened Washer Dimensions

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Bolt Size B A C Weight (lbs.) Per 1000 Pieces Part Numbers Outside Diameter Inside Diameter Thickness Domestic Min Max Plain Galvanized 1⁄2 11⁄16 17⁄32 0.097 0.177 18 16440 16441 5⁄8 15⁄16 11⁄16 0.122 0.177 33 16442 16443 3⁄4 115⁄32 13⁄16 0.122 0.177 41 16444 16445 7⁄8 13⁄4 15⁄16 0.136 0.177 64 16446 16447 1 2 11⁄16 0.136 0.177 82 16448 16449 11⁄8 21⁄4 13⁄16 0.136 0.177 105 16450 16451 11⁄4 21⁄2 13⁄8 0.136 0.177 133 16452 16453 13⁄8 23⁄4 11⁄2 0.136 0.177 163 16454 16455 11⁄2 3 15⁄8 0.136 0.177 200 16456 16457 15⁄8 31⁄4 13⁄4 0.178 0.28 320 19481* 19482* 13⁄4 33⁄8 17⁄8 0.178 0.28 307 16458 16459 17⁄8 31⁄2 2 0.178 0.28 360 16471* 16472 2 33⁄4 21⁄8 0.178 0.28 380 16460 16461 21⁄4 4 23⁄8 0.24 0.34 560 16462 16463 21⁄2 41⁄2 25⁄8 0.24 0.34 720 16464 16465 23⁄4 5 27⁄8 0.24 0.34 920 16611 16612 3 51⁄2 31⁄8 0.24 0.34 1040 16613 16614 31⁄4 6 33⁄8 0.24 0.34 1350 - - 31⁄2 61⁄2 35⁄8 0.24 0.34 1633 18490 18460 33⁄4 7 37⁄8 0.24 0.34 1880 - - 4 71⁄2 41⁄8 0.24 0.34 2200 18461 18462 Dimensions per ASTM F436
*Usually domestic

Other Accessories

Anchor sleeves

The alignment of anchor bolts and setting them perfectly into concrete in the required location so that the structure or equipment can fit perfectly over the anchor bolts is a difficult task. Often anchor bolt sleeves are specified to make this process easier and more forgiving. Anchor sleeves create a cavity or void in the concrete where the anchor bolt can be minutely adjusted in the case that an anchor bolt is slightly out of alignment and needs to be adjusted to fit the structure. Later, the space that the sleeve creates for adjustment is filled in with grout after fit is assured. Portland Bolt carries both Wilson Anchor Bolt Sleeves and Contec Anchor Bolt Sleeves. At times an engineer may specify a custom sleeve that consists of a steel pipe that is welded to an anchor bolt or anchor bolt embed plate. These welded pipe sleeves are highly custom and are designed by an engineer.

Anchor Sleeve Dimensions

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Wilson Sleeves Contec Sleeves Bolt Size Shell Size W x L Part Number Color Code Shell Size W x L Part Number 1⁄2" 2" x 5" 18255 yellow 2" x 5" 18296 3⁄4" - 5⁄8" 2" x 7" 18256 white 2" x 7" 18297 3⁄4" 18257 7⁄8" 18258 1" 3" x 10" 18259 green 3" x 10" 18298 11⁄4" 18260 11⁄2" 4" x 15" 18261 red 4" x 15" 18299 13⁄4" 18262 2" 4" x 18" 18263 blue 4" x 18" 18300 21⁄4" 18264 21⁄2" 6" x 24" 18265 brown 6" x 24" 18301 3" 18482 4" - - black 6" x 24" 18302 5"

Plates

Square plates, embedded plates, and templates are all commonly used with F1554 anchor bolts. It is very typical for square plates to be used in place of F436 washers on the projecting threaded end of the anchor bolt, but perhaps even more common is to weld or fix in place a square plate at the bottom of the anchor bolt for pull out resistance. Embed plates can be round or square and are custom manufactured per an engineer’s requirement for the specific foundation calculated loads. It is typical for these embed or top washer plates to be made from A36 or A572 Grade 50 steel.

Templates and assemblies

Anchor bolts are often grouped in sets of two, four, six, eight, or more and are set into concrete using templates that keep the formation of the foundation in the pattern required. Templates can be used at the top of the anchor bolts as a “throw-away” template or can be pre-assembled with templates at the top and bottom of the assembly to hold the anchor bolts perfectly in place during shipping and concrete placement. Sometimes the bottom template is also a structural embed plate that serves for pull-out resistance and also as a template to hold the designed pattern together. Anchor bolt assemblies can be shipped loose without any assembly to reduce shipping cost and then assembled onsite or can be pre-assembled and shipped in marked assemblies. Fully assembled anchor bolt assemblies are laborious and increase shipping volume, but often greatly reduce onsite labor and create a more seamless product that can be used right off the truck or easily stored without worry about parts going missing.

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