Grade 8 Steel Flange Nuts

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Nut Type

Flange

Fastener Strength Grade/Class

SAE Grade 8

Material

Steel

System of Measurement

Thread Size

Finish

Zinc Yellow-Chromate Plated

Width

Flange Diameter

Performance

Height

Flange Thickness

Fastener Strength Rating

Thread Direction

Hex Nut Profile

Thread Spacing

Color

Locking Type

Thread Type

Drive Style

RoHS

Thread Fit

Unified Standard Class 2B

DFARS Specialty Metals

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REACH

Compliant

Not Compliant

Export Control Classification Number (ECCN)

EAR99

Application

General Purpose

Certificate Type

Material Certificate with Traceable Lot Number

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61 Products

Locking Type

Serrated

Serrations on the flange bite into material for mild vibration resistance

19 products

Application

General Purpose

Nuts have a plain flange for a wide variety of fastening applications

42 products

Performance

Vibration Resistant

Grip tighter than other nuts to resist loosening due to vibration

19 products

Flange Nuts

No need for a separate washer—these nuts have a plain flange that distributes pressure evenly for a wide variety of fastening applications. They are ideal for securing screws in oversized or irregularly shaped holes since the flange covers a larger area than standard nuts. Also known as collar nuts.

High-Strength Steel

Rated Grade 8, Grade G, or Class 10, these are about 25% stronger than medium-strength steel nuts. They are commonly used to fasten components in valves, pumps, and motors. To avoid stripped threads during installation, make sure your screw has a comparable strength rating.

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Zinc-Yellow-Chromate-Plated Steel—With a more durable finish than clear zinc plating, these nuts are suitable for most wet and outdoor environments. However, they won't hold up to the harsh chemicals that stainless steel can.

Black Phosphate-Coated Steel—The dark coating creates both a finished appearance and a barrier against rust that withstands occasional exposure to moisture.

Steel—Best for dry environments since moisture will cause these nuts to rust.

				Flange
	Thread Size	Wd.	Ht.	Dia.	Thk.	Fastener Strength Grade/Class	Pkg. Qty.		Pkg.
Zinc-Plated Steel



		1/4"-20	7/16"	15/64"	19/32"	0.06"	SAE Grade 8	100	000000000	000000


		5/16"-18	1/2"	9/32"	11/16"	0.07"	SAE Grade 8	100	000000000	00000
		3/8"-16	9/16"	11/32"	3/4"	0.08"	SAE Grade 8	50	000000000	00000
		1/2"-13	3/4"	29/64"	1 1/32"	0.1"	SAE Grade 8	25	000000000	00000
		5/8"-11	15/16"	9/16"	1 9/32"	0.12"	SAE Grade 8	10	000000000	00000
		3/4"-10	1 1/8"	21/32"	1 1/2"	0.16"	SAE Grade 8	10	000000000	00000
		3/4"-16	1 1/8"	21/32"	1 1/2"	0.16"	SAE Grade 8	5	000000000	00000


		Zinc-Yellow-Chromate-Plated Steel



				1/4"-20	7/16"	15/64"	19/32"	0.06"	SAE Grade 8	10	000000000	0000


				5/16"-18	1/2"	9/32"	11/16"	0.07"	SAE Grade 8	10	000000000	0000
				3/8"-16	9/16"	11/32"	3/4"	0.08"	SAE Grade 8	10	000000000	0000
				1/2"-13	3/4"	29/64"	1 1/32"	0.1"	SAE Grade 8	10	000000000	0000
				5/8"-11	15/16"	9/16"	1 9/32"	0.12"	SAE Grade 8	5	000000000	00000
				5/8"-18	15/16"	9/16"	1 9/32"	0.12"	SAE Grade 8	5	000000000	00000
				3/4"-10	1 1/8"	21/32"	1 1/2"	0.16"	SAE Grade 8	1	000000000	0000
				3/4"-16	1 1/8"	21/32"	1 1/2"	0.16"	SAE Grade 8	1	000000000	0000
				1"-8	1 1/2"	57/64"	2 1/16"	0.21"	SAE Grade 8	1	000000000	0000


				Black Phosphate-Coated Steel



						1/4"-20	7/16"	15/64"	19/32"	0.06"	SAE Grade 8	100	000000000	00000


						1/4"-28	7/16"	15/64"	19/32"	0.06"	SAE Grade 8	100	000000000	00000
						5/16"-18	1/2"	9/32"	11/16"	0.07"	SAE Grade 8	100	000000000	00000
						5/16"-24	1/2"	9/32"	11/16"	0.07"	SAE Grade 8	100	000000000	00000
						3/8"-16	9/16"	11/32"	3/4"	0.07"	SAE Grade 8	50	000000000	0000
						1/2"-13	3/4"	29/64"	1 1/32"	0.1"	SAE Grade 8	25	000000000	00000
						1/2"-20	3/4"	29/64"	1 1/32"	0.1"	SAE Grade 8	25	000000000	00000
						5/8"-11	15/16"	9/16"	1 9/32"	0.12"	SAE Grade 8	10	000000000	00000
						5/8"-18	15/16"	9/16"	1 9/32"	0.12"	SAE Grade 8	10	000000000	00000
						3/4"-10	1 1/8"	21/32"	1 1/2"	0.16"	SAE Grade 8	10	000000000	00000
						3/4"-16	1 1/8"	21/32"	1 1/2"	0.16"	SAE Grade 8	10	000000000	00000


						7/8"-14	1 5/16"	51/64"	1 3/4"	0.19"	SAE Grade 8	1	000000000	0000


						Steel



								1/4"-20	7/16"	15/64"	19/32"	0.06"	SAE Grade 8	100	000000000	00000


								1/4"-28	7/16"	15/64"	19/32"	0.06"	SAE Grade 8	100	000000000	00000
								5/16"-18	1/2"	9/32"	11/16"	0.07"	SAE Grade 8	25	000000000	00000
								3/8"-16	9/16"	11/32"	3/4"	0.08"	SAE Grade 8	10	000000000	0000
								1/2"-13	3/4"	29/64"	1 1/32"	0.1"	SAE Grade 8	10	000000000	0000
1/2"-20								3/4"	29/64"	1 1/32"	0.1"	SAE Grade 8	10	000000000	00000
9/16"-18	7/8"							1/2"	1 3/16"	0.11"	SAE Grade 8	5	000000000	00000
5/8"-11	15/16"							9/16"	1 9/32"	0.12"	SAE Grade 8	5	000000000	00000
5/8"-18	15/16"							9/16"	1 9/32"	0.12"	SAE Grade 8	5	000000000	00000
3/4"-10	1 1/8"							21/32"	1 1/2"	0.16"	SAE Grade 8	1	000000000	0000
3/4"-16	1 1/8"							21/32"	1 1/2"	0.16"	SAE Grade 8	1	000000000	0000


7/8"-9	1 5/16"							51/64"	1 3/4"	0.19"	SAE Grade 8	1	000000000	0000
1"-8	1 1/2"							57/64"	2 1/16"	0.21"	SAE Grade 8	1	000000000	0000
1"-14	1 1/2"							57/64"	2 1/16"	0.21"	SAE Grade 8	1	000000000	0000

Serrated Flange Nuts

Serrations bite into material for mild vibration resistance while the flange eliminates the need for a separate washer. These nuts are ideal for securing screws in oversized or irregularly shaped holes since the flange covers a larger area than standard nuts. You can use them again and again without sacrificing strength. However, the serrations may mar the surface of your material. Also known as collar nuts.

High-Strength Steel

Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.

Black-Oxide Steel—Typically chosen for their appearance, these nuts have a dark, matte coating that creates a finished look. They offer minimal corrosion resistance, so they're best for dry environments.

Phosphate-Coated Steel—Paint adheres evenly to the surface of these nuts, so you can add your own decorative finish. The coating creates a barrier against rust that withstands occasional exposure to moisture.

Black Phosphate-Coated Steel—The dark coating creates both a finished appearance and a barrier against rust that withstands occasional exposure to moisture.

Steel—Best for dry environments since moisture will cause these nuts to rust.

				Flange
	Thread Size	Wd.	Ht.	Dia.	Thk.	Fastener Strength Grade/Class	Pkg. Qty.		Pkg.
Zinc-Plated Steel



		1/4"-20	7/16"	15/64"	19/32"	0.04"	SAE Grade 8	100	000000000	000000


		5/16"-18	1/2"	9/32"	11/16"	0.04"	SAE Grade 8	100	000000000	00000
		3/8"-16	9/16"	11/32"	3/4"	0.04"	SAE Grade 8	50	000000000	00000
		1/2"-13	3/4"	29/64"	1 1/32"	0.05"	SAE Grade 8	25	000000000	00000
		5/8"-11	15/16"	9/16"	1 9/32"	0.05"	SAE Grade 8	25	000000000	00000
		3/4"-10	1 1/8"	21/32"	1 1/2"	0.06"	SAE Grade 8	10	000000000	00000


		Zinc-Yellow-Chromate-Plated Steel



				9/16"-12	7/8"	1/2"	1 3/16"	0.05"	SAE Grade 8	5	000000000	00000


				Black-Oxide Steel



						1/2"-13	3/4"	29/64"	1 1/32"	0.05"	SAE Grade 8	10	000000000	00000


						5/8"-11	15/16"	9/16"	1 9/32"	0.05"	SAE Grade 8	5	000000000	00000
						3/4"-10	1 1/8"	43/64"	1 1/2"	0.06"	SAE Grade 8	1	000000000	0000


						Phosphate-Coated Steel



								3/4"-10	1 1/8"	43/64"	1 1/2"	0.06"	SAE Grade 8	10	000000000	00000


								Black Phosphate-Coated Steel



										1/4"-20	7/16"	15/64"	19/32"	0.04"	SAE Grade 8	50	000000000	0000


										5/16"-18	1/2"	9/32"	11/16"	0.04"	SAE Grade 8	25	000000000	0000
										3/8"-16	9/16"	11/32"	3/4"	0.04"	SAE Grade 8	25	000000000	0000


										Steel



												1/4"-20	7/16"	15/64"	19/32"	0.04"	SAE Grade 8	100	000000000	00000


												5/16"-18	1/2"	9/32"	43/64"	0.04"	SAE Grade 8	100	000000000	00000
												3/8"-16	9/16"	11/32"	3/4"	0.04"	SAE Grade 8	100	000000000	00000
												1/2"-13	3/4"	29/64"	1 1/32"	0.05"	SAE Grade 8	25	000000000	00000
												5/8"-11	15/16"	9/16"	1 9/32"	0.05"	SAE Grade 8	10	000000000	0000