Today, although the use of hex bolts are a prominent type of fasteners, its predecessor fastener was square shaped. Hence, it is not uncommon to see the use of Stainless Steel Square Head Bolts in older structures or buildings, or other engineering applications. The main benefit of using these 5/16 stainless steel square u bolts was that these fasteners were stable, with the odds of tool slippage being low. This is because, at angled corners, the square head machine bolts stainless steel would act as an anchor.
Available in various sizes and finishes, they are easy to install and any conventional tools may be suited to assemble a stainless steel cup square bolts system. Since most contractors could fix these fasteners with relative ease, the use of stainless steel square u bolts suit spaces that are either tight (space constraints) or dark and poorly lit. In such instances, most contractors have to fix the stainless steel square c bolts blind, without the availability of any visual markers.
Visual markers make it possible to screw, drill in, or fasten the most complicated fasteners. 316 stainless steel square u bolts, in comparison to grade 304 stainless steel are able to handle higher levels of weight and tension or stress, while also offering a significantly higher level of resistance to corrosion. In today’s times, it is typical to see the stainless steel square bolts being used for applications that demand a rustic appearance, especially in furniture or architecture based purposes.
ISO standard | ISO 7380, ISO 4032, JIS standards, ISO 4017, ISO 4033 |
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BS | BS 6105 |
Size |
M6, M30, M12, M10, M16, (M45), M4, M8, M2, M24, (M3.5), M33, M20, M42, (M14), M5, M48, (M18), (M27), (M22), M36, M3, M160 and as per need |
Grade | 4.8, A2-70, A4-80, 8.8, A4, A4-70, A2, 18-8 Stainless Steel, Elevator Bolt |
Length | 3 milimeter - 200 milimeter |
Stainless Steel Threads: | METRIC, BSF, UNF, UNC, BSW or as per need |
DIN | DIN 912, DIN 603, DIN 933, DIN 6923, DIN 931, DIN 7981, DIN 970, DIN 934, DIN916, DIN 7985, DIN 7982, DIN 913, B.S. |
UTS | UNEF, UNS, NPTF, UNC, NPT, UNF |
Tolerance | +/-0.01 milimeter - +/-0.05milimeter |
treatment on Surface |
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Type | Round/ Pan/ Hex Head/ Oval/ Truss head |
Standard: |
JIS, IS, ISO, BS, ANSI, DIN, GB, ASTM and all International Standards |
Head | Pan head, flat head, oval head, hex head, phillips head |
Head drive: | Slotted, Six-Lobe, Phillips/Slot, Phillips, etc |
ASTM Standard | As Per ASTM A380M and A380 |
Manufacturing process | Cold Heading, Heat Treatment, Inspection, Wire Drawing, Packing, Surface Plating, Insert tapping |
Manufacturers | GKW, SPAX® Screws, Kundan, Unbrako, Sundaram Precision, APL, EBY Fastener, Infasco Etc. |
Certificate provided |
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industrial use | Wind tower, Electronic industry, Railway, Construction, Automotive industry, Nuclear power, |
Bolt Diameter | H | D | C | F | |||||
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Height | Body Diameter | Width Across Corners | Width Across Flats | ||||||
Basic | Maximum | Minimum | Maximum | Maximum | Minimum | Basic | Maximum | Minimum | |
1⁄2 | 21⁄64 | 0.348 | 0.308 | 0.515 | 1.061 | 0.995 | 3⁄4 | 0.750 | 0.725 |
5⁄8 | 27⁄64 | 0.444 | 0.400 | 0.642 | 1.326 | 1.244 | 15⁄16 | 0.938 | 0.906 |
3⁄4 | 1⁄2 | 0.524 | 0.476 | 0.768 | 1.591 | 1.494 | 11⁄8 | 1.125 | 1.088 |
7⁄8 | 19⁄32 | 0.620 | 0.568 | 0.895 | 1.856 | 1.742 | 15⁄16 | 1.312 | 1.269 |
1 | 21⁄32 | 0.684 | 0.628 | 1.022 | 2.121 | 1.991 | 11⁄2 | 1.500 | 1.450 |
11⁄8 | 3⁄4 | 0.780 | 0.720 | 1.149 | 2.386 | 2.239 | 111⁄16 | 1.688 | 1.631 |
11⁄4 | 27⁄32 | 0.876 | 0.812 | 1.277 | 2.652 | 2.489 | 17⁄8 | 1.875 | 1.812 |
13⁄8 | 29⁄32 | 0.940 | 0.872 | 1.404 | 2.917 | 2.738 | 21⁄16 | 2.062 | 1.994 |
11⁄2 | 1 | 1.036 | 0.964 | 1.531 | 3.182 | 2.986 | 21⁄4 | 2.250 | 2.175 |
13⁄4* | 13⁄16 | 29⁄16 | |||||||
2* | 15⁄16 | 215⁄16 |
Square head bolt configuration empowers a simpler wrench grasp for nut fixing. They are generally utilized in new development alongside square plate washer and tighten washers. There is likewise a prerequisite to copy a more seasoned latch tasteful in both new and old structures.
Description | Price |
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3/8"-16x1-1/4" Fully Threaded Stainless Steel Square Head Bolt HDG (1,300/Bulk Pkg.) | $211.32 |
1/4"-20x3" Partially Threaded Stainless Steel Square Head Bolt HDG (900/Bulk Pkg.) | $119.52 |
1/2"-13x1-3/4" Fully Threaded Stainless Steel Square Head Bolt HDG (500/Bulk Pkg.) | $193.91 |
1"-8x5" Partially Threaded Stainless Steel Square Head Bolt HDG (40/Bulk Pkg.) | $177.85 |
5/8"-11x2-1/2" Partially Threaded Stainless Steel Square Head Bolt HDG (200/Bulk Pkg.) | $152.06 |
Metric Coarse Square Head Bolt with Collar and Dog Point Grade-8.8 DIN480
d | dp | z3 | s | dc | k |
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M10 | 7.0000 | 2.5000 | 10.0000 | 13.0000 | 13.0000 |
M8 | 5.5000 | 2.0000 | 8.0000 | 10.0000 | 10.0000 |
M24 | 18.0000 | 6.0000 | 24.0000 | 32.0000 | 27.0000 |
M16 | 12.0000 | 4.0000 | 16.0000 | 22.0000 | 20.0000 |
M12 | 8.5000 | 3.0000 | 13.0000 | 17.0000 | 16.0000 |
M20 | 15.0000 | 5.0000 | 21.0000 | 28.0000 | 25.0000 |
Stainless Steel square head bolt Sizes |
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Sizes | size guide | size chart | dimensions |
1/2″-13 x 1-1/2″ Grade 5 Finish | 3/8″-16 x 1″ Grade 5 Finish | 1/4″-20 x 1″ Grade 5 Finish | |
3/8″-16 x 1-1/2″ Grade 5 Finish | 3/8″-16 x 1-1/4″ Grade 5 Finish | 1/4″-20 x 3/4″ Grade 5 Finish | |
1/2″-13 x 2″ Grade 5 Finish | 1/2″-13 x 2″ Grade 8 Yellow Finish | 1/2″-13 x 1-1/2″ Grade 8 Yellow Finish | |
1/4″-20 x 3/4″ Grade 18-8 Stainless Steel | 5/8″-11 x 2″ Grade 8 Yellow Finish | 5/16″-18 x 1″ Grade 5 Finish | |
3/8″-16 x 1″ Grade 18-8 Stainless Steel | 3/8″-16 x 1″ Grade 8 Yellow Finish | 3/8″-16 x 1-1/2″ Grade 8 Yellow Finish | |
5/8″-11 x 2″ Grade 5 Finish | 1/4″-20 x 1″ Grade 18-8 Stainless Steel | 5/8″-11 x 2-1/2″ Grade 8 Yellow Finish | |
3/8″-16 x 1-1/4″ Grade 8 Yellow Finish | 3/8″-16 x 2″ Grade 5 Finish |
At Raaj Sagar Square Head Bolts with plastic cover to guarantee the honesty of fixing surface. Bubble bag, at that point put in to trade wooden perfectly in to items during transportation to forestall knocks , scratches and different circumstances experienced or according to client necessity.
Metric Coarse Stainless Steel Square Head Bolt with Dog Point Grade-8.8 DIN479
d | s | dc | z3 | k | dp | a1 |
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M5 | 5.0000 | 6.5000 | 1.5000 | 5.0000 | 3.5000 | |
M6 | 6.0000 | 8.0000 | 1.7500 | 6.0000 | 4.0000 | |
M8 | 8.0000 | 10.0000 | 2.2500 | 8.0000 | 5.5000 | |
M10 | 10.0000 | 13.0000 | 2.7500 | 10.0000 | 7.0000 | |
M12 | 13.0000 | 17.0000 | 3.2500 | 12.0000 | 8.5000 | |
M16 | 16.0000 | 21.0000 | 4.3000 | 16.0000 | 12.0000 | |
M20 | 22.0000 | 28.0000 | 5.3000 | 20.0000 | 15.0000 | |
M24 | 24.0000 | 31.0000 | 6.3000 | 21.0000 | 18.0000 |
Metric Coarse Square Head Bolt with Large Collar Grade-8.8 DIN478
d | s max | dc | k nom | b | k min | k max | c |
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M5 | 5.0000 | 9.5000 | 7.0000 | 16.0000 | 6.8200 | 7.1800 | 2.1200 |
M6 | 6.0000 | 10.5000 | 8.0000 | 18.0000 | 7.8200 | 8.1800 | 2.1200 |
M8 | 8.0000 | 13.5000 | 10.0000 | 22.0000 | 9.8200 | 10.2000 | 2.1200 |
M10 | 10.0000 | 16.5000 | 13.0000 | 26.0000 | 12.7800 | 13.2200 | 3.1200 |
M12 | 13.0000 | 19.5000 | 15.0000 | 30.0000 | 14.7800 | 15.2200 | 3.1200 |
M16 | 16.0000 | 25.0000 | 20.0000 | 38.0000 | 19.7400 | 20.2600 | 4.1500 |
M20 | 21.0000 | 31.0000 | 25.0000 | 46.0000 | 24.7400 | 25.2600 | 5.1500 |
M24 | 24.0000 | 36.0000 | 28.0000 | 54.0000 | 27.7400 | 28.2600 | 6.1500 |
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Zinc Yellow | |||||
3/8"-16 | 1 in | Right Hand | UNC (Coarse) | ASME B18.21, SAE J429 | |
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3/8"-16 | 1.5 in | Right Hand | UNC (Coarse) | ASME B18.21, SAE J429 | |
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1/2"-13 | 2 in | Right Hand | UNC (Coarse) | ASME B18.21, SAE J429 | |
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1/2"-13 | 2.5 in | Right Hand | UNC (Coarse) | ASME B18.21, SAE J429 | |
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1/2"-13 | 3 in | Right Hand | UNC (Coarse) | ASME B18.21, SAE J429 | |
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5/8"-11 | 3 in | Right Hand | UNC (Coarse) | ASME B18.21, SAE J429 | |
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3/4"-10 | 6 in | Right Hand | UNC (Coarse) | ASME B18.21, SAE J429 | |
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1"-8 | 5 in | Right Hand | UNC (Coarse) | ASME B18.21, SAE J429 |
Metric Coarse Stainless Steel Square Head Bolt with Large Collar Grade-10.9 DIN478
d | s max | dc | k nom | b | k min | k max | c |
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M6 | 6.0000 | 10.5000 | 8.0000 | 18.0000 | 7.8200 | 8.1800 | 2.1200 |
M5 | 5.0000 | 9.5000 | 7.0000 | 16.0000 | 6.8200 | 7.1800 | 2.1200 |
M24 | 24.0000 | 36.0000 | 28.0000 | 54.0000 | 27.7400 | 28.2600 | 6.1500 |
M10 | 10.0000 | 16.5000 | 13.0000 | 26.0000 | 12.7800 | 13.2200 | 3.1200 |
M8 | 8.0000 | 13.5000 | 10.0000 | 22.0000 | 9.8200 | 10.2000 | 2.1200 |
M16 | 16.0000 | 25.0000 | 20.0000 | 38.0000 | 19.7400 | 20.2600 | 4.1500 |
M12 | 13.0000 | 19.5000 | 15.0000 | 30.0000 | 14.7800 | 15.2200 | 3.1200 |
M20 | 21.0000 | 31.0000 | 25.0000 | 46.0000 | 24.7400 | 25.2600 | 5.1500 |
Metric Coarse Fish Plate Bolt with Stainless Steel Square Head Grade-4.6 DIN5903
D | Y | C | X | E | B |
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M16 | 8.0000 | 12.0000 | 27.0000 | 27.0000 | 22.0000 |
M20 | 15.0000 | 14.0000 | 32.0000 | 49.0000 | 30.0000 |
M22 | 17.0000 | 16.0000 | 39.0000 | 49.0000 | 33.0000 |
m | d | b more than 200 | b less than 200 | k |
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27 | M16 | 48 | 36 | 13 |
32 | M20 | 58 | 43 | 16 |
41 | M24 | 73 | 53 | 19 |
50 | M30 | 82 | 24 |
Metric Coarse Square Square Holding Down Bolts Grade-4.6 BS7419
d | M20 | M16 | M30 | M24 | M42 | M36 | M56 | M48 | M64 |
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b max | 127.50 | 122.00 | 140.50 | 133.00 | 155.50 | 148.00 | 172.50 | 163.00 | 182.00 |
b min | 120.00 | 116.00 | 130.00 | 124.00 | 142.00 | 136.00 | 156.00 | 148.00 | 164.00 |
ds max | 20.84 | 16.70 | 30.84 | 24.84 | 43.00 | 37.00 | 57.20 | 49.00 | 65.20 |
ds min | 19.16 | 15.30 | 29.16 | 23.16 | 41.00 | 35.00 | 54.80 | 47.00 | 62.80 |
k nom | 12.50 | 10.00 | 18.70 | 15.00 | 26.00 | 22.50 | 35.00 | 30.00 | 40.00 |
k min | 11.60 | 9.25 | 17.65 | 14.10 | 24.95 | 21.45 | 33.75 | 28.95 | 38.75 |
k max | 13.40 | 10.75 | 19.75 | 15.90 | 27.05 | 23.55 | 36.25 | 31.05 | 41.25 |
s max | 30.00 | 24.00 | 46.00 | 36.00 | 65.00 | 55.00 | 85.00 | 75.00 | 95.00 |
s min | 29.16 | 23.16 | 45.00 | 35.00 | 63.10 | 53.80 | 82.80 | 73.10 | 92.80 |
k1 nom | 10.00 | 8.00 | 15.00 | 12.00 | 21.00 | 18.00 | 28.00 | 24.00 | 32.00 |
k1 min | 9.25 | 7.25 | 14.10 | 11.10 | 19.95 | 17.10 | 26.95 | 22.95 | 30.75 |
k1 max | 10.75 | 8.75 | 15.90 | 12.90 | 22.05 | 18.90 | 29.05 | 25.05 | 33.25 |
s1 max | 20.84 | 16.70 | 30.84 | 24.84 | 42.00 | 37.00 | 57.20 | 49.00 | 65.20 |
s1 min | 19.16 | 15.30 | 29.16 | 23.16 | 41.00 | 35.00 | 54.80 | 47.00 | 62.80 |
Metric Coarse Stainless Steel Square Holding Down Bolts Grade-8.8 BS7419
d | M20 | M16 | M24 | M56 | M36 | M64 | M30 | M48 | M42 |
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b max | 127.50 | 122.00 | 133.00 | 172.50 | 148.00 | 182.00 | 140.50 | 163.00 | 155.50 |
b min | 120.00 | 116.00 | 124.00 | 156.00 | 136.00 | 164.00 | 130.00 | 148.00 | 142.00 |
ds max | 20.84 | 16.70 | 24.84 | 57.20 | 37.00 | 65.20 | 30.84 | 49.00 | 43.00 |
ds min | 19.16 | 15.30 | 23.16 | 54.80 | 35.00 | 62.80 | 29.16 | 47.00 | 41.00 |
k nom | 12.50 | 10.00 | 15.00 | 35.00 | 22.50 | 40.00 | 18.70 | 30.00 | 26.00 |
k min | 11.60 | 9.25 | 14.10 | 33.75 | 21.45 | 38.75 | 17.65 | 28.95 | 24.95 |
k max | 13.40 | 10.75 | 15.90 | 36.25 | 23.55 | 41.25 | 19.75 | 31.05 | 27.05 |
s max | 30.00 | 24.00 | 36.00 | 85.00 | 55.00 | 95.00 | 46.00 | 75.00 | 65.00 |
s min | 29.16 | 23.16 | 35.00 | 82.80 | 53.80 | 92.80 | 45.00 | 73.10 | 63.10 |
k1 nom | 10.00 | 8.00 | 12.00 | 28.00 | 18.00 | 32.00 | 15.00 | 24.00 | 21.00 |
k1 min | 9.25 | 7.25 | 11.10 | 26.95 | 17.10 | 30.75 | 14.10 | 22.95 | 19.95 |
k1 max | 10.75 | 8.75 | 12.90 | 29.05 | 18.90 | 33.25 | 15.90 | 25.05 | 22.05 |
s1 max | 20.84 | 16.70 | 24.84 | 57.20 | 37.00 | 65.20 | 30.84 | 49.00 | 42.00 |
s1 min | 19.16 | 15.30 | 23.16 | 54.80 | 35.00 | 62.80 | 29.16 | 47.00 | 41.00 |
D | A min | A max | R max | C square | F min | F max | D |
1/4" | 0.435 | 0.445 | 1/32" | 0.63 | 0.166 | 0.186 | 1/4" |
5/16" | 0.515 | 0.525 | 1/32" | 0.74 | 0.208 | 0.228 | 5/16" |
3/8" | 0.585 | 0.600 | 1/32" | 0.85 | 0.250 | 0.270 | 3/8" |
7/16" | 0.695 | 0.710 | 1/32" | 1.00 | 0.292 | 0.312 | 7/16" |
1/2" | 0.800 | 0.820 | 1/32" | 1.16 | 0.333 | 0.363 | 1/2" |
9/16" | 0.900 | 0.920 | 3/64" | 1.30 | 0.375 | 0.405 | 9/16" |
5/8" | 0.985 | 1.010 | 3/64" | 1.43 | 0.417 | 0.447 | 5/8" |
3/4" | 1.175 | 1.200 | 3/64" | 1.70 | 0.500 | 0.530 | 3/4" |
7/8" | 1.270 | 1.300 | 1/16" | 1.84 | 0.583 | 0.623 | 7/8" |
1" | 1.450 | 1.480 | 1/16" | 2.09 | 0.666 | 0.706 | 1" |
1 1/8" | 1.640 | 1.670 | 1/8" | 2.36 | 0.75 | 0.79 | 1 1/8" |
1 1/4" | 1.815 | 1.860 | 1/8" | 2.63 | 0.83 | 0.89 | 1 1/4" |
1 3/8" | 2.005 | 2.050 | 1/8" | 2.90 | 0.92 | 0.98 | 1 3/8" |
1 1/2" | 2.175 | 2.220 | 1/8" | 3.14 | 1.00 | 1.06 | 1 1/2" |
1 5/8" | 2.365 | 2.410 | 1/8" | 3.41 | 1.08 | 1.18 | 1 5/8" |
1 3/4" | 2.520 | 2.580 | 1/8" | 3.65 | 1.17 | 1.27 | 1 3/4" |
2" | 2.700 | 2.760 | 1/8" | 3.90 | 1.33 | 1.43 | 2" |
2 1/4" | 3.090 | 3.150 | 3/16" | 4.45 | 1.50 | 1.60 | 2 1/4" |
2 1/2" | 3.490 | 3.550 | 3/16" | 5.02 | 1.67 | 1.77 | 2 1/2" |
2 3/4" | 3.830 | 3.890 | 3/16" | 5.50 | 1.83 | 1.93 | 2 3/4" |
3" | 4.080 | 4.180 | 3/16" | 5.91 | 2.00 | 2.15 | 3" |
3 1/4" | 4.430 | 4.530 | 1/4" | 6.41 | 2.17 | 2.32 | 3 1/4" |
3 1/2" | 4.750 | 4.850 | 1/4" | 6.86 | 2.33 | 2.48 | 3 1/2" |
3 3/4" | 5.080 | 5.180 | 1/4" | 7.33 | 2.50 | 2.65 | 3 3/4" |
4" | 5.450 | 5.550 | 1/4" | 7.85 | 2.67 | 2.82 | 4" |
4 1/2" | 6.255 | 6.380 | 1/4" | 9.02 | 3.00 | 3.20 | 4 1/2" |
5" | 7.175 | 7.300 | 1/4" | 10.32 | 3.33 | 3.53 | 5" |
5 1/2" | 8.225 | 8.350 | 1/4" | 11.81 | 3.67 | 3.87 | 5 1/2" |
6" | 9.325 | 9.450 | 1/4" | 13.36 | 4.00 | 4.20 | 6" |
D | A min | A max | R max | C square | F min | F max | D |
1/4" | 0.435 | 0.445 | 1/32" | 0.63 | 0.166 | 0.186 | 1/4" |
5/16" | 0.515 | 0.525 | 1/32" | 0.74 | 0.208 | 0.228 | 5/16" |
3/8" | 0.585 | 0.600 | 1/32" | 0.85 | 0.250 | 0.270 | 3/8" |
7/16" | 0.695 | 0.710 | 1/32" | 1.00 | 0.292 | 0.312 | 7/16" |
1/2" | 0.800 | 0.820 | 1/32" | 1.16 | 0.333 | 0.363 | 1/2" |
9/16" | 0.900 | 0.920 | 3/64" | 1.30 | 0.375 | 0.405 | 9/16" |
5/8" | 0.985 | 1.010 | 3/64" | 1.43 | 0.417 | 0.447 | 5/8" |
3/4" | 1.175 | 1.200 | 3/64" | 1.70 | 0.500 | 0.530 | 3/4" |
7/8" | 1.270 | 1.300 | 1/16" | 1.84 | 0.583 | 0.623 | 7/8" |
1" | 1.450 | 1.480 | 1/16" | 2.09 | 0.666 | 0.706 | 1" |
1 1/8" | 1.640 | 1.670 | 1/8" | 2.36 | 0.75 | 0.79 | 1 1/8" |
1 1/4" | 1.815 | 1.860 | 1/8" | 2.63 | 0.83 | 0.89 | 1 1/4" |
1 3/8" | 2.005 | 2.050 | 1/8" | 2.90 | 0.92 | 0.98 | 1 3/8" |
1 1/2" | 2.175 | 2.220 | 1/8" | 3.14 | 1.00 | 1.06 | 1 1/2" |
1 5/8" | 2.365 | 2.410 | 1/8" | 3.41 | 1.08 | 1.18 | 1 5/8" |
1 3/4" | 2.520 | 2.580 | 1/8" | 3.65 | 1.17 | 1.27 | 1 3/4" |
2" | 2.700 | 2.760 | 1/8" | 3.90 | 1.33 | 1.43 | 2" |
2 1/4" | 3.090 | 3.150 | 3/16" | 4.45 | 1.50 | 1.60 | 2 1/4" |
2 1/2" | 3.490 | 3.550 | 3/16" | 5.02 | 1.67 | 1.77 | 2 1/2" |
2 3/4" | 3.830 | 3.890 | 3/16" | 5.50 | 1.83 | 1.93 | 2 3/4" |
3" | 4.080 | 4.180 | 3/16" | 5.91 | 2.00 | 2.15 | 3" |
3 1/4" | 4.430 | 4.530 | 1/4" | 6.41 | 2.17 | 2.32 | 3 1/4" |
3 1/2" | 4.750 | 4.850 | 1/4" | 6.86 | 2.33 | 2.48 | 3 1/2" |
3 3/4" | 5.080 | 5.180 | 1/4" | 7.33 | 2.50 | 2.65 | 3 3/4" |
4" | 5.450 | 5.550 | 1/4" | 7.85 | 2.67 | 2.82 | 4" |
4 1/2" | 6.255 | 6.380 | 1/4" | 9.02 | 3.00 | 3.20 | 4 1/2" |
5" | 7.175 | 7.300 | 1/4" | 10.32 | 3.33 | 3.53 | 5" |
5 1/2" | 8.225 | 8.350 | 1/4" | 11.81 | 3.67 | 3.87 | 5 1/2" |
6" | 9.325 | 9.450 | 1/4" | 13.36 | 4.00 | 4.20 | 6" |