Chimney Nuts | McMaster-Carr

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Clip On

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Distance from Center of Hole to Edge

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Finish

Corrosion-Resistant Coated

Thread Pitch

Thread Type

For Use With

Strong-Grip Clip-On Barrel Nuts Included

1/4"-20 with 0.531" from Hole Center to Edge (11 Pieces)

1/4"-20 with 0.531" from Hole Center to Edge (50 Pieces)

1/4"-20 with 0.781" from Hole Center to Edge (10 Pieces)

1/4"-20 with 0.781" from Hole Center to Edge (50 Pieces)

3/8"-16 with 0.75" from Hole Center to Edge (25 Pieces)

3/8"-16 with 0.75" from Hole Center to Edge (8 Pieces)

3/8"-16 with 1.125" from Hole Center to Edge (25 Pieces)

3/8"-16 with 1.125" from Hole Center to Edge (3 Pieces)

5/16"-18 with 0.562" from Hole Center to Edge (50 Pieces)

5/16"-18 with 0.562" from Hole Center to Edge (8 Pieces)

5/16"-18 with 0.843" from Hole Center to Edge (25 Pieces)

5/16"-18 with 0.843" from Hole Center to Edge (7 Pieces)

8-32 with 0.406" from Hole Center to Edge (4 Pieces)

10-24 with 0.468" from Hole Center to Edge (50 Pieces)

10-24 with 0.468" from Hole Center to Edge (7 Pieces)

M4 with 13.5 mm from Hole Center to Edge (5 Pieces)

M5 with 15.8 mm from Hole Center to Edge (5 Pieces)

M6 with 12 mm from Hole Center to Edge (5 Pieces)

Thread Fit

Metric Class 6H

Unified Standard Class 2B

RoHS

Compliant

Not Compliant

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

REACH

Compliant

Not Compliant

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

Low-Profile Strong-Grip Clip-On Nuts for Tapping Screws Included

1/4" with 0.375" from Hole Center to Edge (15 Pieces)

1/4" with 0.375" from Hole Center to Edge (25 Pieces)

No. 6 with 0.375" from Hole Center to Edge (20 Pieces)

No. 6 with 0.375" from Hole Center to Edge (50 Pieces)

No. 8 with 0.375" from Hole Center to Edge (125 Pieces)

No. 8 with 0.375" from Hole Center to Edge (20 Pieces)

No. 8 with 0.625" from Hole Center to Edge (100 Pieces)

No. 10 with 0.344" from Hole Center to Edge (15 Pieces)

No. 10 with 0.344" from Hole Center to Edge (25 Pieces)

No. 10 with 0.563" from Hole Center to Edge (50 Pieces)

Clip-On Hex Nuts Included

1/4"-20 with 0.5" from Hole Center to Edge (50 Pieces)

5/16"-18 with 0.563" from Hole Center to Edge (50 Pieces)

Container Features

Number of Pieces

Low-Profile Clip-On Nuts for Tapping Screws Included

1/4" with 0.469" from Hole Center to Edge (12 Pieces)

1/4" with 0.5" from Hole Center to Edge (12 Pieces)

5/16" with 0.5" from Hole Center to Edge (12 Pieces)

Container Type

63 Products

Strong-Grip Clip-On Barrel Nuts

These clip-on nuts have a barrel with multiple threads for secure thread engagement. Also known as U-nuts, they squeeze both sides of thin panels for a tighter grip than J-nuts.

Zinc-Plated Steel—Zinc-plated steel nuts are corrosion resistant in wet environments.

Black Phosphate-Coated Steel—Black phosphate-coated steel nuts are mildly corrosion resistant in dry environments.

Corrosion-Resistant-Coated Steel—Corrosion-resistant-coated steel nuts hold up the best in wet and outdoor environments. The coating has been tested to extreme standards, including 720 hours of salt spray resistance.

	For Panel Thk.	Distance from Ctr. of Hole to Edge (A)	For Use With	Clip-On Nut Type	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	M4 × 0.7 mm	0.6 mm to 3.8 mm	9.5 mm	Machine Screws	With Barrel	15	95210A310	000000


	M4.2 × 1.4 mm	0.5 mm to 2 mm	10 mm	Tapping Screws	With Barrel	15	95210A320	00000
	M4.2 × 1.4 mm	0.7 mm to 3.8 mm	9.5 mm	Tapping Screws	With Barrel	10	95210A330	00000
	M4.2 × 1.4 mm	0.7 mm to 3.8 mm	15 mm	Tapping Screws	With Barrel	5	95210A340	00000
	M5 × 0.8 mm	0.5 mm to 1.5 mm	11.5 mm	Machine Screws	With Barrel	10	95210A350	00000
	M6 × 1 mm	0.5 mm to 2.3 mm	14.5 mm	Machine Screws	With Barrel	10	94850A191	00000
	M6 × 1 mm	2 mm to 5 mm	14.5 mm	Machine Screws	With Barrel	5	95210A380	00000
	M6 × 1 mm	3.4 mm to 6.3 mm	14.5 mm	Machine Screws	With Barrel	10	95210A370	00000
	M8 × 1.25 mm	0.8 mm to 4 mm	14.5 mm	Machine Screws	With Barrel	5	94850A194	0000
	M8 × 1.25 mm	0.8 mm to 4 mm	21 mm	Machine Screws	With Barrel	5	94850A195	0000
	M8 × 1.25 mm	1.5 mm to 5.5 mm	14.5 mm	Machine Screws	With Barrel	20	95210A420	00000


	M10 × 1.5 mm	1.5 mm to 5.5 mm	28 mm	Machine Screws	With Barrel	5	95210A440	00000


	Black Phosphate-Coated Steel



			8-32	0.025" to 0.15"	0.378"	Machine Screws	With Barrel	25	94850A111	00000


			8-32	0.079" to 0.118"	0.375"	Machine Screws	With Barrel	25	94850A105	00000
			10-24	0.025" to 0.125"	0.468"	Machine Screws	With Barrel	25	94850A120	00000
			10-24	0.14" to 0.16"	0.48"	Machine Screws	With Barrel	25	94850A196	0000
			1/4"-20	0.025" to 0.15"	0.531"	Machine Screws	With Barrel	25	94850A129	0000
			1/4"-20	0.025" to 0.15"	0.781"	Machine Screws	With Barrel	25	94850A140	00000
			5/16"-18	0.025" to 0.15"	0.562"	Machine Screws	With Barrel	25	94850A150	00000
			5/16"-18	0.025" to 0.15"	0.843"	Machine Screws	With Barrel	25	94850A160	00000
			3/8"-16	0.05" to 0.2"	0.75"	Machine Screws	With Barrel	10	94850A170	00000
			3/8"-16	0.05" to 0.2"	1.125"	Machine Screws	With Barrel	10	94850A179	00000
			M4 × 0.7 mm	0.8 mm to 4 mm	13.5 mm	Machine Screws	With Barrel	25	95210A110	00000


			M5 × 0.8 mm	0.6 mm to 3.8 mm	11 mm	Machine Screws	With Barrel	25	95210A120	00000
			M5 × 0.8 mm	0.8 mm to 4 mm	15.8 mm	Machine Screws	With Barrel	25	95210A130	00000
			M6 × 1 mm	0.8 mm to 4 mm	12 mm	Machine Screws	With Barrel	25	95210A150	00000
			M6 × 1 mm	0.8 mm to 4 mm	13.5 mm	Machine Screws	With Barrel	25	95210A360	00000
			M6 × 1 mm	0.8 mm to 4 mm	19.5 mm	Machine Screws	With Barrel	25	95210A175	00000
			M6 × 1 mm	3.4 mm to 6.3 mm	13.5 mm	Machine Screws	With Barrel	10	95210A170	0000
			M6 × 1 mm	4.3 mm to 5.6 mm	21 mm	Machine Screws	With Barrel	5	95210A390	00000
			M6.3 × 1 mm	0.8 mm to 4 mm	13.5 mm	Machine Screws	With Barrel	25	95210A410	00000
			M8 × 1.25 mm	0.8 mm to 4 mm	14.5 mm	Machine Screws	With Barrel	25	95210A190	00000
			M8 × 1.25 mm	0.8 mm to 4.5 mm	20 mm	Machine Screws	With Barrel	25	95210A200	00000


			M8 × 1.25 mm	1.7 mm to 5.5 mm	28.5 mm	Machine Screws	With Barrel	5	95210A430	00000
			M8 × 1.25 mm	4 mm to 7 mm	21 mm	Machine Screws	With Barrel	10	95210A210	00000
			M10 × 1.5 mm	1 mm to 6 mm	19 mm	Machine Screws	With Barrel	10	95210A240	00000


			Corrosion-Resistant-Coated Steel



					M6 × 1 mm	0.5 mm to 4 mm	13 mm	Machine Screws	With Barrel	10	94850A193	00000

Clip-On Nut Assortments


48 Pieces	70 Pieces	125 Pieces	965 Pieces

Keep a variety of clip-on nuts on hand to create fastening points for screws. Simply slide these nuts onto the edges of thin panels.

Strong-grip nuts squeeze both sides of the panel for a tight grip. They’re also known as U-nuts.

Low-Profile Clip-On Nut—Low-profile nuts are for low-clearance applications.

Clip-On Barrel Nut—Barrel nuts have multiple threads for secure thread engagement.

	Includes	For Panel Thk.	Container Type	Clip-On Nut Type		Each
Black Phosphate-Coated Steel



	48	12 Low-Profile Strong-Grip Clip-On Nuts (1/4"-20) 36 Low-Profile Clip-On Nuts For Tapping Screws (1/4" to 5/16")	0.028" to 0.125"	Plastic Box	Low Profile	91204A130	000000


	70	70 Low-Profile Strong-Grip Clip-On Nuts For Tapping Screws (No. 6 to 1/4")	0.025" to 0.125"	Plastic Box	Low Profile	91204A120	00000
	125	125 Strong-Grip Clip-On Barrel Nuts (8-32 to 3/8"-16, M4 to M10)	0.025" to 0.248"	Plastic Box	With Barrel	91204A140	000000
	965	100 Clip-On Hex Nuts (1/4"-20 to 5/16"-18) 475 Strong-Grip Clip-On Barrel Nuts (10-24 to 3/8"-16, M6 to M10) 15 Strong-Grip Clip-On Barrel Nuts For Tapping Screws (No. 10) 375 Low-Profile Strong-Grip Clip-On Nuts For Tapping Screws (No. 6 to 1/4")	0.025" to 0.236"	Metal Box	Low Profile, With Barrel, With Hex Nut	91204A110	000000

Strong-Grip Clip-On Nuts for Tapping Screws

For a stronger grip than J-nuts, these nuts—also known as U-nuts—firmly squeeze thin panels from both sides. Use them as a fastening point for tapping screws. They’re mildly corrosion resistant in dry environments thanks to a black phosphate coating.

	For Panel Thk.	Distance from Ctr. of Hole to Edge (A)	For Use With	Clip-On Nut Type	Pkg. Qty.		Pkg.
Black Phosphate-Coated Steel



	No. 4	0.036" to 0.047"	0.2"	Tapping Screws	Low Profile	50	94808A158	000000


	No. 6	0.025" to 0.04"	0.218"	Tapping Screws	Low Profile	25	94808A160	0000
	No. 6	0.025" to 0.125"	0.375"	Tapping Screws	Low Profile	50	94810A005	00000
	No. 8	0.025" to 0.04"	0.234"	Tapping Screws	Low Profile	25	94808A167	00000
	No. 8	0.025" to 0.04"	0.328"	Tapping Screws	Low Profile	25	94808A169	00000
	No. 8	0.025" to 0.04"	0.515"	Tapping Screws	Low Profile	25	94808A168	0000
	No. 8	0.025" to 0.125"	0.375"	Tapping Screws	Low Profile	25	94810A006	0000
	No. 8	0.025" to 0.15"	0.625"	Tapping Screws	Low Profile	50	94810A100	00000
	No. 8	0.045" to 0.062"	0.234"	Tapping Screws	Low Profile	25	94808A172	0000
	No. 8	0.045" to 0.062"	0.515"	Tapping Screws	Low Profile	25	94808A176	00000
	No. 8	0.05" to 0.08"	0.296"	Tapping Screws	Low Profile	25	94808A180	00000


	No. 8	0.11" to 0.187"	0.312"	Tapping Screws	Low Profile	25	94808A185	0000
	No. 10	0.025" to 0.04"	0.25"	Tapping Screws	Low Profile	25	94808A193	00000
	No. 10	0.025" to 0.125"	0.344"	Tapping Screws	Low Profile	25	94810A007	0000
	No. 10	0.025" to 0.15"	0.563"	Tapping Screws	Low Profile	50	94810A200	00000
	No. 10	0.045" to 0.062"	0.359"	Tapping Screws	Low Profile	25	94808A500	00000
	No. 10	0.045" to 0.062"	0.562"	Tapping Screws	Low Profile	25	94808A210	00000
	No. 10	0.102" to 0.125"	0.406"	Tapping Screws	Low Profile	25	94808A190	0000
	1/4"	0.025" to 0.125"	0.375"	Tapping Screws	Low Profile	25	94810A008	00000

Strong-Grip Clip-On Nuts


Clip-On Hex Nut	Clip-On Square Nut

Also known as U-nuts, these nuts squeeze both sides of thin panels for a tighter grip than J-nuts. The hex- or square-shaped barrel gives your wrench a spot to grip, so you can keep these nuts in place as you tighten a machine screw. For secure fastening, multiple threads in the barrel engage with your screw.

Zinc-Plated Steel—Zinc-plated steel nuts are corrosion resistant in wet environments.

Black Phosphate-Coated Steel—Black phosphate-coated steel nuts are mildly corrosion resistant in dry environments.

	For Panel Thk.	Distance from Ctr. of Hole to Edge (A)	For Use With	Clip-On Nut Type	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	5/16"-18	0.096" to 0.141"	0.5"	Machine Screws	With Square Nut	5	90542A258	00000


	Black Phosphate-Coated Steel



			1/4"-20	0.05" to 0.07"	0.375"	Machine Screws	With Hex Nut	10	90542A242	0000


			5/16"-18	0.096" to 0.141"	0.5"	Machine Screws	With Square Nut	5	90542A243	0000