Tube End Inserts | McMaster-Carr

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154 Products

Tube-Connecting Nuts

Create strong joints in metal and plastic round tubes. Clips on both ends grip the sides of the tube to hold the nut in place. A zinc plating provides corrosion resistance in wet environments.

	For OD	Thread Size	Lg.	Retaining Clip Material	Pkg. Qty.		Pkg.
Zinc-Plated Steel



	0.53" to 0.54"	5/8"	1/4"-20	0.27"	Steel	5	94290A509	00000


	0.62" to 0.65"	3/4"	1/4"-20	0.23"	Steel	10	94290A510	0000
	0.62" to 0.65"	3/4"	5/16"-18	0.31"	Steel	10	94290A515	0000
	0.67" to 0.69"	3/4"	1/4"-20	0.23"	Steel	10	94290A620	00000
	0.75" to 0.77"	7/8"	1/4"-20	0.23"	Steel	10	94290A520	0000
	0.78" to 0.83"	1"	1/4"-20	0.23"	Steel	5	94290A630	0000
	0.87" to 0.9"	1"	1/4"-20	0.23"	Steel	10	94290A550	0000
	0.87" to 0.9"	1"	5/16"-18	0.32"	Steel	10	94290A555	0000
	0.87" to 0.9"	1"	3/8"-16	0.4"	Steel	5	94290A553	0000
	1" to 1.02"	1 1/8"	1/4"-20	0.22"	Steel	5	94290A557	0000
	1.12" to 1.15"	1 1/4"	1/4"-20	0.2"	Steel	10	94290A571	00000


	1.12" to 1.15"	1 1/4"	5/16"-18	0.4"	Steel	10	94290A573	00000
	1.12" to 1.15"	1 1/4"	3/8"-16	0.4"	Steel	5	94290A640	0000
	1.25" to 1.27"	1 3/8"	1/4"-20	0.27"	Steel	5	94290A581	0000
	1.25" to 1.27"	1 3/8"	5/16"-18	0.24"	Steel	5	94290A650	0000
	1.37" to 1.4"	1 1/2"	1/4"-20	0.27"	Steel	5	94290A591	0000
	1.37" to 1.4"	1 1/2"	5/16"-18	0.41"	Steel	5	94290A593	0000
	1.62" to 1.65"	1 3/4"	1/4"-20	0.25"	Steel	5	94290A600	0000
	1.62" to 1.65"	1 3/4"	5/16"-18	0.27"	Steel	5	94290A660	0000
	1.87" to 1.9"	2"	1/4"-20	0.22"	Steel	5	94290A610	00000
	1.87" to 1.9"	2"	5/16"-18	0.4"	Steel	1	94290A670	0000

Tube End Weld Nuts

Weld these nuts into tube ends to attach threaded fittings such as rod ends. The welded connection is stronger than tapping a tube directly. These nuts are often used to link control arms and suspensions. Also known as tube adapters and weldable threaded tube ends.

	For Tube Wall Thk.	Thread Size	Ht.	Threading	Thread Lg.		Each
4130 Alloy Steel







				For 3/8" OD Tubes

				0.058"	10-32	1"	Fully Threaded	1"	94640A871	00000




						For 1/2" OD Tubes

						0.058"	1/4"-28	1"	Fully Threaded	1"	94640A881	0000


						0.058"	5/16"-24	1"	Fully Threaded	1"	94640A120	0000




								For 5/8" OD Tubes

								0.058"	5/16"-24	1"	Partially Threaded	3/4"	94640A130	0000


								0.058"	3/8"-24	1"	Partially Threaded	3/4"	94640A140	0000
								0.058"	7/16"-20	1"	Fully Threaded	1"	94640A170	0000




										For 3/4" OD Tubes

										0.058"	5/16"-24	1"	Partially Threaded	3/4"	94640A180	0000


										0.058"	3/8"-24	1"	Fully Threaded	1"	94640A190	0000
										0.058"	7/16"-20	1"	Fully Threaded	1"	94640A210	0000
										0.065"	5/16"-24	1 3/8"	Partially Threaded	7/8"	94640A110	0000
										0.065"	3/8"-24	1 3/8"	Partially Threaded	15/16"	94640A115	0000
										0.065"	7/16"-20	1 3/8"	Partially Threaded	1 1/8"	94640A230	0000




												For 7/8" OD Tubes

												0.058"	3/8"-24	1 3/8"	Partially Threaded	15/16"	94640A150	0000


												0.058"	7/16"-20	1 3/8"	Partially Threaded	1 1/8"	94640A155	0000
												0.058"	1/2"-20	1 3/8"	Partially Threaded	1 1/4"	94640A160	0000
												0.065"	3/8"-24	1 3/8"	Partially Threaded	15/16"	94640A250	0000
												0.065"	7/16"-20	1 3/8"	Partially Threaded	1"	94640A260	0000
												0.065"	1/2"-20	1 3/8"	Partially Threaded	1 1/4"	94640A280	0000
												0.083"	3/8"-24	1 1/2"	Partially Threaded	15/16"	94640A310	0000
												0.083"	7/16"-20	1 1/2"	Partially Threaded	1 1/8"	94640A320	0000
												0.083"	1/2"-20	1 1/2"	Partially Threaded	1 1/4"	94640A330	0000




												For 1" OD Tubes

												0.058"	3/8"-24	1 1/2"	Partially Threaded	15/16"	94640A340	0000


		0.058"	7/16"-20									1 1/2"	Partially Threaded	1"	94640A370	0000
		0.058"	1/2"-20									1 1/2"	Partially Threaded	1 1/4"	94640A220	0000
		0.058"	5/8"-18									1 1/2"	Fully Threaded	1 1/2"	94640A225	0000
		0.065"	3/8"-24									1 1/2"	Partially Threaded	15/16"	94640A380	0000
		0.065"	7/16"-20									1 1/2"	Partially Threaded	1"	94640A390	0000
		0.065"	1/2"-20	1 1/2"								Partially Threaded	1 1/4"	94640A240	0000
		0.065"	5/8"-18	1 1/2"	Fully Threaded							1 1/2"	94640A245	0000
		0.083"	3/8"-24	1 1/2"	Partially Threaded							15/16"	94640A420	0000
		0.083"	7/16"-20	1 1/2"	Partially Threaded							1"	94640A430	0000
		0.083"	1/2"-20	1 1/2"	Partially Threaded							1 1/4"	94640A265	0000


		0.083"	5/8"-18	1 1/2"	Fully Threaded							1 1/2"	94640A270	0000
		0.095"	3/8"-24	1 1/2"	Partially Threaded							15/16"	94640A440	0000
		0.095"	7/16"-20	1 1/2"	Partially Threaded							1"	94640A450	0000
		0.095"	1/2"-20	1 1/2"	Partially Threaded	1 1/4"						94640A285	0000
		0.095"	5/8"-18	1 1/2"	Fully Threaded	1 1/2"	94640A290					0000




				For 1 1/8" OD Tubes

				0.058"	1/2"-20	1 1/2"	Partially Threaded					1 1/4"	94640A470	0000


				0.058"	5/8"-18	1 1/2"	Fully Threaded					1 1/2"	94640A480	0000
				0.065"	1/2"-20	1 1/2"	Partially Threaded	1 1/4"				94640A490	0000
				0.065"	5/8"-18	1 1/2"	Fully Threaded	1 1/2"	94640A520			0000
				0.083"	1/2"-20	1 1/2"	Partially Threaded	1 1/4"	94640A530			0000
				0.083"	5/8"-18	1 1/2"	Fully Threaded	1 1/2"	94640A540			0000
				0.083"	3/4"-16	1 1/2"	Fully Threaded	1 1/2"	94640A570			0000
				0.095"	1/2"-20	1 1/2"	Partially Threaded	1 1/4"	94640A580			0000
				0.095"	5/8"-18	1 1/2"	Fully Threaded	1 1/2"	94640A590			0000
				0.095"	3/4"-16	1 1/2"	Fully Threaded	1 1/2"	94640A610			0000




						For 1 1/4" OD Tubes

						0.095"	5/8"-18	1 1/2"	Fully Threaded			1 1/2"	94640A350	00000


						0.095"	3/4"-16	1 1/2"	Fully Threaded	1 1/2"	94640A355	00000
						0.12"	5/8"-18	1 7/8"	Partially Threaded	1 9/16"	94640A360	00000
						0.12"	3/4"-16	1 7/8"	Fully Threaded	1 7/8"	94640A365	00000




								For 1 3/8" OD Tubes

								0.095"	5/8"-18	1 7/8"	Partially Threaded	1 9/16"	94640A630	00000


								0.095"	3/4"-16	1 7/8"	Fully Threaded	1 7/8"	94640A650	00000
0.12"								5/8"-18	1 7/8"	Partially Threaded	1 9/16"	94640A660	00000
0.12"	3/4"-16							1 7/8"	Fully Threaded	1 7/8"	94640A680	00000




								For 1 1/2" OD Tubes

								0.095"	5/8"-18	1 7/8"	Partially Threaded	1 9/16"	94640A710	00000


								0.095"	3/4"-16	1 7/8"	Fully Threaded	1 7/8"	94640A720	00000
								0.12"	3/4"-16	2"	Partially Threaded	1 7/8"	94640A410	00000
								0.12"	7/8"-14	2"	Fully Threaded	2"	94640A415	00000
								0.25"	3/4"-16	2"	Fully Threaded	2"	94640A730	00000
								0.25"	7/8"-14	2"	Fully Threaded	2"	94640A740	00000




										For 1 3/4" OD Tubes

										0.12"	3/4"-16	2"	Fully Threaded	2"	94640A770	00000


										0.12"	7/8"-14	2"	Fully Threaded	2"	94640A780	00000
		0.12"								1"-14	2"	Fully Threaded	2"	94640A790	00000
		0.12"	1 1/4"-12							2"	Fully Threaded	2"	94640A820	00000
		0.25"	3/4"-16							2"	Partially Threaded	1 7/8"	94640A830	00000
		0.25"	7/8"-14							2"	Fully Threaded	2"	94640A840	00000
		0.25"	1"-14							2"	Fully Threaded	2"	94640A460	00000




										For 2" OD Tubes

										0.25"	1 1/4"-12	3 1/4"	Fully Threaded	3 1/4"	94640A850	00000

Left-Hand-Thread Tube End Weld Nuts

These weld nuts prevent fasteners from backing out of assemblies that rotate counterclockwise. Their left-hand threads pair with left-hand screws and rods to stop the fastener from loosening as the assembly turns. Weld them to the end of a tube for a stronger connection than tapping the tube directly. Also known as tube adapters and weldable threaded tube ends.

	Thread Size	Ht.	Threading	Thread Lg.		Each
4130 Alloy Steel







			For 3/8" OD Tubes

			0.058"	10-32	1"	Fully Threaded	1"	94640A872	00000




					For 1/2" OD Tubes

					0.058"	1/4"-28	1"	Fully Threaded	1"	94640A882	0000


					0.058"	5/16"-24	1"	Fully Threaded	1"	94640A101	0000




							For 5/8" OD Tubes

							0.058"	5/16"-24	1"	Partially Threaded	3/4"	94640A102	0000


							0.058"	3/8"-24	1"	Partially Threaded	3/4"	94640A103	0000
							0.058"	7/16"-20	1"	Fully Threaded	1"	94640A104	0000




									For 3/4" OD Tubes

									0.058"	5/16"-24	1"	Partially Threaded	3/4"	94640A105	0000


									0.058"	3/8"-24	1"	Fully Threaded	1"	94640A106	0000
									0.058"	7/16"-20	1"	Fully Threaded	1"	94640A107	0000
									0.065"	5/16"-24	1 3/8"	Partially Threaded	7/8"	94640A114	0000
									0.065"	3/8"-24	1 3/8"	Partially Threaded	15/16"	94640A119	0000
									0.065"	7/16"-20	1 3/8"	Partially Threaded	1 1/8"	94640A108	0000




											For 7/8" OD Tubes

											0.058"	3/8"-24	1 3/8"	Partially Threaded	1"	94640A154	0000


											0.058"	7/16"-20	1 3/8"	Partially Threaded	1 1/8"	94640A159	0000
											0.058"	1/2"-20	1 3/8"	Partially Threaded	1 1/4"	94640A164	0000
											0.065"	3/8"-24	1 3/8"	Partially Threaded	1"	94640A109	0000
											0.065"	7/16"-20	1 3/8"	Partially Threaded	1"	94640A201	0000
											0.065"	1/2"-20	1 3/8"	Partially Threaded	1 1/4"	94640A202	0000
											0.083"	3/8"-24	1 1/2"	Partially Threaded	1"	94640A203	0000
											0.083"	7/16"-20	1 1/2"	Partially Threaded	1 1/8"	94640A204	0000
											0.083"	1/2"-20	1 1/2"	Partially Threaded	1 1/4"	94640A205	0000




											For 1" OD Tubes

											0.058"	3/8"-24	1 1/2"	Partially Threaded	1"	94640A206	0000


	0.058"	1/2"-20									1 1/2"	Partially Threaded	1 1/4"	94640A224	0000
	0.058"	5/8"-18									1 1/2"	Fully Threaded	1 1/2"	94640A229	0000
	0.065"	3/8"-24									1 1/2"	Partially Threaded	1"	94640A208	0000
	0.065"	7/16"-20									1 1/2"	Partially Threaded	1"	94640A209	0000
	0.065"	1/2"-20									1 1/2"	Partially Threaded	1 1/4"	94640A244	0000
	0.065"	5/8"-18	1 1/2"								Fully Threaded	1 1/2"	94640A249	0000
	0.083"	3/8"-24	1 1/2"	Partially Threaded							1"	94640A301	0000
	0.083"	1/2"-20	1 1/2"	Partially Threaded							1 1/4"	94640A269	0000
	0.083"	5/8"-18	1 1/2"	Fully Threaded							1 1/2"	94640A274	0000
	0.095"	3/8"-24	1 1/2"	Partially Threaded							1"	94640A303	0000


	0.095"	7/16"-20	1 1/2"	Partially Threaded							1"	94640A304	0000
	0.095"	1/2"-20	1 1/2"	Partially Threaded							1 1/4"	94640A289	0000
	0.095"	5/8"-18	1 1/2"	Fully Threaded							1 1/2"	94640A294	0000




			For 1 1/8" OD Tubes

			0.058"	1/2"-20	1 1/2"	Partially Threaded					1 1/4"	94640A305	0000


			0.058"	5/8"-18	1 1/2"	Fully Threaded					1 1/2"	94640A306	0000
			0.065"	1/2"-20	1 1/2"	Partially Threaded					1 1/4"	94640A307	0000
			0.065"	5/8"-18	1 1/2"	Fully Threaded					1 1/2"	94640A308	0000
			0.083"	5/8"-18	1 1/2"	Fully Threaded	1 1/2"				94640A401	0000
			0.083"	3/4"-16	1 1/2"	Fully Threaded	1 1/2"	94640A402			0000
			0.095"	1/2"-20	1 1/2"	Partially Threaded	1 1/4"	94640A403			0000
			0.095"	5/8"-18	1 1/2"	Fully Threaded	1 1/2"	94640A404			0000
			0.095"	3/4"-16	1 1/2"	Fully Threaded	1 1/2"	94640A405			0000




					For 1 1/4" OD Tubes

					0.095"	5/8"-18	1 1/2"	Fully Threaded			1 1/2"	94640A354	00000


					0.095"	3/4"-16	1 1/2"	Fully Threaded			1 1/2"	94640A359	00000
					0.12"	5/8"-18	1 7/8"	Partially Threaded	1 9/16"		94640A364	00000
					0.12"	3/4"-16	1 7/8"	Fully Threaded	1 7/8"	94640A369	00000




							For 1 3/8" OD Tubes

							0.095"	5/8"-18	1 7/8"	Partially Threaded	1 9/16"	94640A406	00000


							0.095"	3/4"-16	1 7/8"	Fully Threaded	1 7/8"	94640A407	00000
							0.12"	5/8"-18	1 7/8"	Partially Threaded	1 9/16"	94640A408	00000
							0.12"	3/4"-16	1 7/8"	Fully Threaded	1 7/8"	94640A409	00000




							For 1 1/2" OD Tubes

							0.095"	5/8"-18	1 7/8"	Partially Threaded	1 5/8"	94640A501	00000


							0.095"	3/4"-16	1 7/8"	Fully Threaded	1 7/8"	94640A502	00000
							0.12"	3/4"-16	2"	Partially Threaded	1 7/8"	94640A414	00000
							0.25"	3/4"-16	2"	Fully Threaded	2"	94640A503	00000
							0.25"	7/8"-14	2"	Fully Threaded	2"	94640A504	00000




									For 1 3/4" OD Tubes

									0.12"	3/4"-16	2"	Fully Threaded	2"	94640A505	00000


									0.12"	1"-14	2"	Fully Threaded	2"	94640A507	00000
									0.12"	1 1/4"-12	2"	Fully Threaded	2"	94640A508	00000
									0.25"	3/4"-16	2"	Partially Threaded	1 7/8"	94640A509	00000
	0.25"								7/8"-14	2"	Fully Threaded	2"	94640A601	00000
	0.25"	1"-14							2"	Fully Threaded	2"	94640A464	00000




									For 2" OD Tubes

									0.25"	1 1/4"-12	3 1/4"	Fully Threaded	3 1/4"	94640A602	00000