Flange Bolts
Loose joints and lost washers kill uptime. Flange bolts give you a built-in washer face to spread clamp load and speed assembly even when holes are a little sloppy. Go serrated for vibration and shock, 18-8 stainless for corrosion, Grade 8 or metric 10.9 for high clamp force. We keep the common SAE, DIN, JIS, IFI styles ready.
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Grade 8 Flange Bolts - Phosphate & Oil
Grade 8 phosphate-and-oil flange bolts made from medium carbon steel with coarse (USS) threads and hex washer heads. Meets SAE J429 Grade 8 with 150,000 psi tensile strength; flange head eliminates the need for a separate washer and helps distribute clamping load.
Thread Type: Coarse
| Item # | Diameter | Length | Thread Size | Package Qty | |||
|---|---|---|---|---|---|---|---|
|
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323104
|
3/8"
|
3/8"-16
|
25
|
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|
|
323110
|
1/2"
|
1/2"-13
|
25
|
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|
|
323128
|
5/8"
|
5/8"-11
|
10
|
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|
|
323148
|
3/4"
|
3/4"-10
|
5
|
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Thread Type: Fine
| Item # | Diameter | Length | Thread Size | Package Qty | |||
|---|---|---|---|---|---|---|---|
|
|
323210
|
1/2"
|
1/2"-20
|
25
|
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|
|
323229
|
5/8"
|
5/8"-18
|
10
|
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|
|
323248
|
3/4"
|
3/4"-16
|
5
|
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Metric 8.8 DIN Flange Bolts
Metric 8.8 DIN flange bolts: heat-treated medium carbon steel fasteners with zinc plating, hex washer heads and coarse metric threads manufactured to DIN 6921. Grade 8.8 construction provides a minimum tensile strength of 116,000 psi and the flange head helps distribute load for secure assemblies.
| Item # | Diameter | Length | Thread Size | Thread Type | Package Qty | |||
|---|---|---|---|---|---|---|---|---|
|
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4570616
|
M6
|
M6 x 1.0
|
Coarse
|
25
|
Log in to view price | |
|
|
|
4570816
|
M8
|
M8 x 1.25
|
Coarse
|
25
|
Log in to view price | |
|
|
|
4571020
|
M10
|
M10 x 1.5
|
Coarse
|
25
|
Log in to view price | |
|
|
|
4571220
|
M12
|
M12 x 1.75
|
Coarse
|
25
|
Log in to view price | |
|
|
|
4571640
|
M16
|
M16 x 2.0
|
Coarse
|
10
|
Log in to view price |
Grade 8 Flange Bolts
Grade 8 flange bolts manufactured from high-strength alloy steel with a built-in washer face and hex washer head. Yellow dichromate finish helps resist corrosion while coarse USS threads and SAE J429 Grade 8 construction provide 150,000 psi tensile strength for heavy-duty clamping.
Thread Type: Coarse
| Item # | Diameter | Length | Thread Size | Package Qty | |||
|---|---|---|---|---|---|---|---|
|
|
325104
|
3/8"
|
3/8"-16
|
10
|
Log in to view price | ||
|
|
325110
|
1/2"
|
1/2"-13
|
10
|
Log in to view price | ||
|
|
325128
|
5/8"
|
5/8"-11
|
10
|
Log in to view price | ||
|
|
325148
|
3/4"
|
3/4"-10
|
3
|
Log in to view price |
Thread Type: Fine
| Item # | Diameter | Length | Thread Size | Package Qty | |||
|---|---|---|---|---|---|---|---|
|
|
325210
|
1/2"
|
1/2"-20
|
10
|
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|
|
325229
|
5/8"
|
5/8"-18
|
5
|
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|
|
325248
|
3/4"
|
3/4"-16
|
3
|
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18-8 Stainless Steel Serrated Head Flange Bolts
18-8 stainless steel serrated head flange bolts with coarse (USS) threads. Serrated flange head provides vibration resistance and a built-in bearing surface that allows for hole variance, helping faster assemblies and resisting loosening in equipment and food-service environments.
| Item # | Diameter | Length | Thread Size | Thread Type | Package Qty | |||
|---|---|---|---|---|---|---|---|---|
|
|
3320405
|
1/4"
|
1/4"-20
|
Coarse
|
25
|
Log in to view price | ||
|
|
3320508
|
5/16"
|
5/16"-18
|
Coarse
|
25
|
Log in to view price | ||
|
|
3320604
|
3/8"
|
3/8"-16
|
Coarse
|
25
|
Log in to view price | ||
|
|
3320806
|
1/2"
|
1/2"-13
|
Coarse
|
10
|
Log in to view price |
Isoplastic Flange Screws - USS
Isoplastic USS flange screws made from fiberglass-reinforced Isoplastic provide non-conductive, corrosion-resistant fastening with hex washer heads and coarse threads. High tensile strength and impact resistance help prevent failure and resist common shop chemicals. Made in the U.S.A.
| Item # | Diameter | Length | Thread Size | Thread Type | Package Qty | |||
|---|---|---|---|---|---|---|---|---|
|
|
356404
|
1/4"
|
1/4"-20
|
Coarse
|
25
|
Log in to view price | ||
|
|
356604
|
3/8"
|
3/8"-16
|
Coarse
|
5
|
Log in to view price | ||
|
|
356808
|
1/2"
|
1/2"-13
|
Coarse
|
5
|
Log in to view price |
Metric 10.9 Plain Finish IFI Flange Bolts
Metric 10.9 IFI flange bolts in alloy steel with a plain finish, hex washer heads and coarse metric threads. Heat treated to a minimum tensile strength of 150,800 psi (approximately equivalent to Grade 8) and manufactured to IFI 536, providing high strength for structural and mechanical fastening applications.
| Item # | Diameter | Length | Thread Size | Thread Type | Package Qty | |||
|---|---|---|---|---|---|---|---|---|
|
|
4510616
|
M6
|
M6 x 1.0
|
Coarse
|
25
|
Log in to view price | ||
|
|
4510816
|
M8
|
M8 x 1.25
|
Coarse
|
25
|
Log in to view price | ||
|
|
4511020
|
M10
|
M10 x 1.5
|
Coarse
|
25
|
Log in to view price | ||
|
|
4511225
|
M12
|
M12 x 1.75
|
Coarse
|
25
|
Log in to view price |
Metric 10.9 IFI Flange Bolts
Metric IFI flange bolts in Grade 10.9 alloy steel with zinc plating and hex washer heads. Engineered to IFI 536 with minimum tensile strength of 150,800 psi, coarse threads and standard flange diameters. High strength and corrosion-resistant finish for mechanical assemblies.
| Item # | Diameter | Length | Thread Size | Thread Type | Package Qty | |||
|---|---|---|---|---|---|---|---|---|
|
|
4520616
|
M6
|
M6 x 1.0
|
Coarse
|
25
|
Log in to view price | ||
|
|
4520816
|
M8
|
M8 x 1.25
|
Coarse
|
25
|
Log in to view price | ||
|
|
4521020
|
M10
|
M10 x 1.5
|
Coarse
|
25
|
Log in to view price | ||
|
|
4521225
|
M12
|
M12 x 1.75
|
Coarse
|
25
|
Log in to view price |
Metric 10.9 DIN Flange Bolts
Metric 10.9 DIN flange bolts made from heat‑treated alloy steel with a zinc finish. Hex washer head with coarse metric threads meeting DIN 6921 and a minimum tensile strength of 150,800 psi, providing high strength and corrosion resistance for mechanical and automotive assemblies.
| Item # | Diameter | Length | Thread Size | Thread Type | Package Qty | |||
|---|---|---|---|---|---|---|---|---|
|
|
4530616
|
M6
|
M6 x 1.0
|
Coarse
|
25
|
Log in to view price | ||
|
|
4530816
|
M8
|
M8 x 1.25
|
Coarse
|
25
|
Log in to view price | ||
|
|
4531020
|
M10
|
M10 x 1.5
|
Coarse
|
25
|
Log in to view price | ||
|
|
4531225
|
M12
|
M12 x 1.75
|
Coarse
|
25
|
Log in to view price | ||
|
|
4531435
|
M14
|
M14 x 2.0
|
Coarse
|
10
|
Log in to view price | ||
|
|
4531635
|
M16
|
M16 x 2.0
|
Coarse
|
10
|
Log in to view price |
Metric Class 100 Serrated Flange Bolts
Metric Class 100 serrated flange bolts made from alloy steel with zinc plating. Hex washer head and coarse metric threads fully threaded to the head. Serrated flange resists loosening from vibration and the flange eases alignment for more efficient assemblies.
| Item # | Diameter | Length | Thread Size | Thread Type | Package Qty | |||
|---|---|---|---|---|---|---|---|---|
|
|
4540612
|
M6
|
M6 x 1.0
|
Coarse
|
25
|
Log in to view price | ||
|
|
4540812
|
M8
|
M8 x 1.25
|
Coarse
|
10
|
Log in to view price | ||
|
|
4541020
|
M10
|
M10 x 1.5
|
Coarse
|
10
|
Log in to view price |
Metric 10.9 JIS Flange Bolts
Metric 10.9 JIS flange bolts: heat‑treated alloy steel with zinc plating and hex washer heads. Meet JIS dimensional specs and deliver high tensile strength (min. 150,800 psi), providing greater clamping reliability and improved fatigue resistance for automotive and industrial assemblies.
| Item # | Diameter | Length | Thread Size | Thread Type | Package Qty | |||
|---|---|---|---|---|---|---|---|---|
|
|
454610
|
M6
|
M6 x 1.0
|
Coarse
|
25
|
Log in to view price | ||
|
|
454620
|
M8
|
M8 x 1.25
|
Coarse
|
25
|
Log in to view price | ||
|
|
454631
|
M10
|
M10 x 1.25
|
Fine
|
25
|
Log in to view price | ||
|
|
454640
|
M12
|
M12 x 1.25
|
Coarse
|
10
|
Log in to view price |
Metric 10.9 Flange Bolts
Metric 10.9 flange bolts made from alloy steel with hex washer heads and coarse metric threads. Phosphate-and-oil finish provides corrosion resistance and the flange design helps accommodate hole variation for faster assemblies. Suitable for high-strength fastening. Made in the U.S.A.
| Item # | Diameter | Length | Thread Size | Thread Type | Package Qty | |||
|---|---|---|---|---|---|---|---|---|
|
|
4550820
|
M8
|
M8 x 1.25
|
Coarse
|
10
|
Log in to view price | ||
|
|
4551020
|
M10
|
M10 x 1.5
|
Coarse
|
10
|
Log in to view price | ||
|
|
4551225
|
M12
|
M12 x 1.75
|
Coarse
|
10
|
Log in to view price | ||
|
|
4551635
|
M16
|
M16 x 2.0
|
Coarse
|
10
|
Log in to view price |
Premium USA Grade 8 Flange Bolts - Phosphate & Oil
Premium Grade 8 flange bolts made from carbon steel with a phosphate & oil finish and hex washer heads. SAE J429 Grade 8 tensile specification provides high strength; flange design helps accommodate hole variance for faster assemblies. Coarse threads for standard fittings. Made in the U.S.A.
| Item # | Diameter | Length | Thread Size | Thread Type | Package Qty | |||
|---|---|---|---|---|---|---|---|---|
|
|
3230506
|
5/16"
|
5/16"-18
|
Coarse
|
10
|
Log in to view price | ||
|
|
3230606
|
3/8"
|
3/8"-16
|
Coarse
|
10
|
Log in to view price | ||
|
|
3230808
|
1/2"
|
1/2"-13
|
Coarse
|
10
|
Log in to view price | ||
|
|
3231010
|
5/8"
|
5/8"-11
|
Coarse
|
10
|
Log in to view price |
62 options | Item #:
323104
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30 options | Item #:
4570616
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66 options | Item #:
325104
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25 options | Item #:
3320405
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24 options | Item #:
356404
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30 options | Item #:
4510616
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29 options | Item #:
4520616
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41 options | Item #:
4530616
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15 options | Item #:
4540612
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46 options | Item #:
454610
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19 options | Item #:
4550820
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38 options | Item #:
3230506
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Kimball Midwest offers a wide selection of flanged hex head cap screws and flange bolts designed for high-performance fastening in a variety of industrial applications. Our flanged hex head bolts are engineered with an integrated flange that eliminates the need for a separate washer, providing a reliable bearing surface and accommodating hole size variances. Available in a variety of materials and finishes, including phosphate and oil, stainless steel and zinc-plated options, these fasteners are designed for durability and strength.
Our Phosphate & Oil Flange Bolts are made from medium carbon martensite steel and meet SAE J429 Grade 8 standards, ensuring a tensile strength of 150,000 PSI or more. These bolts are ideal for any use, including high-stress environments. The 18-8 stainless steel flange head bolts offer excellent corrosion resistance and feature a serrated design for vibration resistance, making them perfect for food service, fertilizer and other corrosion-prone environments.
We also offer flanged button head Allen bolts, socket head flange bolts and small head flange bolts, as well as a variety of complementary components like hex nuts, lock nuts, flat washers and split lock washers. All of these products are made in the USA, offering high-quality solutions for efficient assembly and reliable performance across industries.
Contact a local sales representative today to get the flange bolts you need.
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