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Tapered Cup Expansion Plugs, Cupped Plugs

Tapered cup expansion plugs are used to plug or seal an existing hole for higher pressure than concave style.

Use our Quick Search below to source steel (cold rolled steel) tapered cup expansion plugs from our wide selection of options.

Material: Steel (CRS)

Customary Finishes: Black Oxide (BO), Nickel (N), Zinc Type II & III (Z2 & Z3) (other finishes also available)

Not all available materials or finishes are listed in our catalog for every part number. If you require a different material, finish or size, please submit a quote.

If you need additional information on your particular tapered cup expansion plug application click on one of the links below:
     View our material & finish specification sheets
     View metallic material characteristic information
     View finish characteristic information

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Dimensions in Inches

Product Number	Nominal Plug Dia	A (Min)	A (Max)	B (Min)	B (Max)	C	T	Material	Finish	Stock	Leadtime	Get Pricing
5791-1	0.281	0.271	0.281	0.286	0.289	0.172	0.036	Cold Rolled Steel		11249	In Stock - Ready To Ship!	Price
5791-1-BO	0.281	0.271	0.281	0.286	0.289	0.172	0.036	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-1-N	0.281	0.271	0.281	0.286	0.289	0.172	0.036	Cold Rolled Steel	Nickel	0	5-6 Weeks	Price
5791-1-Z2	0.281	0.271	0.281	0.286	0.289	0.172	0.036	Cold Rolled Steel	Zinc Type II	0	4-5 Weeks for <= 11249 7-8 Weeks for > 11249	Price
5791-1-Z3	0.281	0.271	0.281	0.286	0.289	0.172	0.036	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 11249 7-8 Weeks for > 11249	Price
5791-26	0.312	0.302	0.312	0.317	0.320	0.168	0.036	Cold Rolled Steel		11197	In Stock - Ready To Ship!	Price
5791-26-BO	0.312	0.302	0.312	0.317	0.320	0.168	0.036	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-26-C1	0.312	0.302	0.312	0.317	0.320	0.168	0.036	Cold Rolled Steel	Cadmium Type I	0	5-6 Weeks for <= 11197 8-9 Weeks for > 11197	Price
5791-26-N	0.312	0.302	0.312	0.317	0.320	0.168	0.036	Cold Rolled Steel	Nickel	0	5-6 Weeks for <= 11197 8-9 Weeks for > 11197	Price
5791-26-Z3	0.312	0.302	0.312	0.317	0.320	0.168	0.036	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 11197 7-8 Weeks for > 11197	Price
5791-27	0.344	0.334	0.344	0.349	0.352	0.172	0.036	Cold Rolled Steel		1533	In Stock - Ready To Ship!	Price
5791-27-BO	0.344	0.334	0.344	0.349	0.352	0.172	0.036	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-27-Z3	0.344	0.334	0.344	0.349	0.352	0.172	0.036	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 1533 8-9 Weeks for > 1533	Price
5791-2-BO	0.375	0.365	0.375	0.381	0.384	0.240	0.048	Cold Rolled Steel	Black Oxide	1471	In Stock - Ready To Ship!	Price
5791-2	0.375	0.365	0.375	0.381	0.384	0.240	0.048	Cold Rolled Steel		3999	In Stock - Ready To Ship!	Price
5791-28	0.406	0.396	0.406	0.412	0.415	0.240	0.048	Cold Rolled Steel		2	In Stock - Ready To Ship!	Price
5791-28-BO	0.406	0.396	0.406	0.412	0.415	0.240	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-28-N	0.406	0.396	0.406	0.412	0.415	0.240	0.048	Cold Rolled Steel	Nickel	22	In Stock - Ready To Ship!	Price
5791-28-Z3	0.406	0.396	0.406	0.412	0.415	0.240	0.048	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 2 7-8 Weeks for > 2	Price
5791-3	0.438	0.428	0.438	0.444	0.447	0.240	0.048	Cold Rolled Steel		3417	In Stock - Ready To Ship!	Price
5791-3-BO	0.438	0.428	0.438	0.444	0.447	0.240	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-3-Z3	0.438	0.428	0.438	0.444	0.447	0.240	0.048	Cold Rolled Steel	Zinc Type III	10	In Stock - Ready To Ship!	Price
5791-4	0.469	0.459	0.469	0.475	0.478	0.240	0.048	Cold Rolled Steel		5755	In Stock - Ready To Ship!	Price
5791-4-BO	0.469	0.459	0.469	0.475	0.478	0.240	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-4-Z2	0.469	0.459	0.469	0.475	0.478	0.240	0.048	Cold Rolled Steel	Zinc Type II	0	4-5 Weeks for <= 5755 7-8 Weeks for > 5755	Price
5791-4-Z3	0.469	0.459	0.469	0.475	0.478	0.240	0.048	Cold Rolled Steel	Zinc Type III	4	In Stock - Ready To Ship!	Price
5791-5	0.500	0.490	0.500	0.506	0.509	0.380	0.048	Cold Rolled Steel		23451	In Stock - Ready To Ship!	Price
5791-5-BO	0.500	0.490	0.500	0.506	0.509	0.380	0.048	Cold Rolled Steel	Black Oxide	872	In Stock - Ready To Ship!	Price
5791-5-N	0.500	0.490	0.500	0.506	0.509	0.380	0.048	Cold Rolled Steel	Nickel	0	4-5 Weeks for <= 23451 7-8 Weeks for > 23451	Price
5791-5-Z2	0.500	0.490	0.500	0.506	0.509	0.380	0.048	Cold Rolled Steel	Zinc Type II	0	4-5 Weeks for <= 23451 7-8 Weeks for > 23451	Price
5791-5-Z3	0.500	0.490	0.500	0.506	0.509	0.380	0.048	Cold Rolled Steel	Zinc Type III	4656	In Stock - Ready To Ship!	Price
5791-6	0.531	0.521	0.531	0.537	0.540	0.380	0.048	Cold Rolled Steel		46	In Stock - Ready To Ship!	Price
5791-6-BO	0.531	0.521	0.531	0.537	0.540	0.380	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-6-Z3	0.531	0.521	0.531	0.537	0.540	0.380	0.048	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 46 7-8 Weeks for > 46	Price
5791-24	0.547	0.544	0.554	0.560	0.565	0.210	0.032	Cold Rolled Steel		17926	In Stock - Ready To Ship!	Price
5791-24-BO	0.547	0.544	0.554	0.560	0.565	0.210	0.032	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-24-N	0.547	0.544	0.554	0.560	0.565	0.210	0.032	Cold Rolled Steel	Nickel	0	4-5 Weeks for <= 17926 7-8 Weeks for > 17926	Price
5791-24-Z3	0.547	0.544	0.554	0.560	0.565	0.210	0.032	Cold Rolled Steel	Zinc Type III	231	In Stock - Ready To Ship!	Price
5791-7	0.562	0.552	0.562	0.568	0.571	0.380	0.048	Cold Rolled Steel		1119	In Stock - Ready To Ship!	Price
5791-7-BO	0.562	0.552	0.562	0.568	0.571	0.380	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-7-Z3	0.562	0.552	0.562	0.568	0.571	0.380	0.048	Cold Rolled Steel	Zinc Type III	5436	In Stock - Ready To Ship!	Price
5791-8	0.594	0.584	0.594	0.600	0.603	0.380	0.048	Cold Rolled Steel		2355	In Stock - Ready To Ship!	Price
5791-8-BO	0.594	0.584	0.594	0.600	0.603	0.380	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-9	0.625	0.615	0.625	0.631	0.634	0.380	0.048	Cold Rolled Steel		1308	In Stock - Ready To Ship!	Price
5791-9-BO	0.625	0.615	0.625	0.631	0.634	0.380	0.048	Cold Rolled Steel	Black Oxide	18	In Stock - Ready To Ship!	Price
5791-9-Z2	0.625	0.615	0.625	0.631	0.634	0.380	0.048	Cold Rolled Steel	Zinc Type II	0	4-5 Weeks for <= 1308 7-8 Weeks for > 1308	Price
5791-9-Z3	0.625	0.615	0.625	0.631	0.634	0.380	0.048	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 1308 7-8 Weeks for > 1308	Price
5791-10	0.656	0.646	0.656	0.662	0.665	0.380	0.048	Cold Rolled Steel		570	In Stock - Ready To Ship!	Price
5791-10-BO	0.656	0.646	0.656	0.662	0.665	0.380	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-10-Z3	0.656	0.646	0.656	0.662	0.665	0.380	0.048	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 570 7-8 Weeks for > 570	Price
5791-11	0.688	0.678	0.688	0.694	0.697	0.380	0.048	Cold Rolled Steel		74598	In Stock - Ready To Ship!	Price
5791-11-BO	0.688	0.678	0.688	0.694	0.697	0.380	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-12	0.719	0.709	0.719	0.725	0.728	0.380	0.048	Cold Rolled Steel		1162	In Stock - Ready To Ship!	Price
5791-12-BO	0.719	0.709	0.719	0.725	0.728	0.380	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-13	0.750	0.740	0.750	0.756	0.759	0.380	0.048	Cold Rolled Steel		8291	In Stock - Ready To Ship!	Price
5791-13-BO	0.750	0.740	0.750	0.756	0.759	0.380	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks for <= 8291 7-8 Weeks for > 8291	Price
5791-13-Z3	0.750	0.740	0.750	0.756	0.759	0.380	0.048	Cold Rolled Steel	Zinc Type III	71	In Stock - Ready To Ship!	Price
5791-33	0.812	0.802	0.812	0.818	0.821	0.500	0.048	Cold Rolled Steel		122	In Stock - Ready To Ship!	Price
5791-33-BO	0.812	0.802	0.812	0.818	0.821	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-33-N	0.812	0.802	0.812	0.818	0.821	0.500	0.048	Cold Rolled Steel	Nickel	0	4-5 Weeks for <= 122 7-8 Weeks for > 122	Price
5791-33-Z3	0.812	0.802	0.812	0.818	0.821	0.500	0.048	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 122 7-8 Weeks for > 122	Price
5791-14	0.875	0.865	0.875	0.881	0.884	0.500	0.048	Cold Rolled Steel		1918	In Stock - Ready To Ship!	Price
5791-14-BO	0.875	0.865	0.875	0.881	0.884	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-14-Z3	0.875	0.865	0.875	0.881	0.884	0.500	0.048	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 1918 7-8 Weeks for > 1918	Price
5791-15	0.922	0.917	0.927	0.933	0.936	0.500	0.048	Cold Rolled Steel		86	In Stock - Ready To Ship!	Price
5791-15-BO	0.922	0.917	0.927	0.933	0.936	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-16	0.938	0.928	0.938	0.944	0.947	0.500	0.048	Cold Rolled Steel		250	In Stock - Ready To Ship!	Price
5791-16-BO	0.938	0.928	0.938	0.944	0.947	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-17	1	0.990	1	1.006	1.009	0.500	0.048	Cold Rolled Steel		768	In Stock - Ready To Ship!	Price
5791-17-BO	1	0.990	1	1.006	1.009	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-17-Z3	1	0.990	1	1.006	1.009	0.500	0.048	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 768 7-8 Weeks for > 768	Price
5791-25	1.063	1.052	1.062	1.069	1.073	0.500	0.048	Cold Rolled Steel		8027	In Stock - Ready To Ship!	Price
5791-25-BO	1.063	1.052	1.062	1.069	1.073	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-25-Z3	1.063	1.052	1.062	1.069	1.073	0.500	0.048	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 8027 7-8 Weeks for > 8027	Price
5791-29	1.125	1.115	1.125	1.132	1.136	0.500	0.048	Cold Rolled Steel		2171	In Stock - Ready To Ship!	Price
5791-29-BO	1.125	1.115	1.125	1.132	1.136	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-29-Z2	1.125	1.115	1.125	1.132	1.136	0.500	0.048	Cold Rolled Steel	Zinc Type II	0	4-5 Weeks for <= 2171 9-10 Weeks for > 2171	Price
5791-18	1.188	1.178	1.188	1.195	1.199	0.500	0.048	Cold Rolled Steel		542	In Stock - Ready To Ship!	Price
5791-18-BO	1.188	1.178	1.188	1.195	1.199	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-19	1.250	1.240	1.250	1.257	1.261	0.500	0.048	Cold Rolled Steel		16856	In Stock - Ready To Ship!	Price
5791-19-BO	1.250	1.240	1.250	1.257	1.261	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-19-Z3	1.250	1.240	1.250	1.257	1.261	0.500	0.048	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 16856 7-8 Weeks for > 16856	Price
5791-30	1.250	1.240	1.250	1.257	1.261	0.250	0.060	Cold Rolled Steel		528	In Stock - Ready To Ship!	Price
5791-30-BO	1.250	1.240	1.250	1.257	1.261	0.250	0.060	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-30-Z2	1.250	1.240	1.250	1.257	1.261	0.250	0.060	Cold Rolled Steel	Zinc Type II	0	4-5 Weeks for <= 528 7-8 Weeks for > 528	Price
5791-30-Z3	1.250	1.240	1.250	1.257	1.261	0.250	0.060	Cold Rolled Steel	Zinc Type III	865	In Stock - Ready To Ship!	Price
5791-34	1.312	1.302	1.312	1.319	1.323	0.500	0.048	Cold Rolled Steel		63	In Stock - Ready To Ship!	Price
5791-34-BO	1.312	1.302	1.312	1.319	1.323	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-20	1.375	1.365	1.375	1.382	1.386	0.500	0.048	Cold Rolled Steel		17290	In Stock - Ready To Ship!	Price
5791-20-BO	1.375	1.365	1.375	1.382	1.386	0.500	0.048	Cold Rolled Steel	Black Oxide	309	In Stock - Ready To Ship!	Price
5791-31	1.437	1.428	1.438	1.445	1.449	0.500	0.048	Cold Rolled Steel		556	In Stock - Ready To Ship!	Price
5791-31-BO	1.437	1.428	1.438	1.445	1.449	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-21	1.500	1.490	1.500	1.507	1.511	0.500	0.048	Cold Rolled Steel		284	In Stock - Ready To Ship!	Price
5791-21-BO	1.500	1.490	1.500	1.507	1.511	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-21-Z3	1.500	1.490	1.500	1.507	1.511	0.500	0.048	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 284 7-8 Weeks for > 284	Price
5791-32	1.625	1.615	1.625	1.633	1.637	0.500	0.048	Cold Rolled Steel		1	In Stock - Ready To Ship!	Price
5791-32-BO	1.625	1.615	1.625	1.633	1.637	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-22	1.750	1.740	1.750	1.758	1.762	0.500	0.048	Cold Rolled Steel		995	In Stock - Ready To Ship!	Price
5791-22-BO	1.750	1.740	1.750	1.758	1.762	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-22-Z2	1.750	1.740	1.750	1.758	1.762	0.500	0.048	Cold Rolled Steel	Zinc Type II	393	In Stock - Ready To Ship!	Price
5791-23	1.875	1.865	1.875	1.883	1.887	0.500	0.048	Cold Rolled Steel		13195	In Stock - Ready To Ship!	Price
5791-23-BO	1.875	1.865	1.875	1.883	1.887	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price
5791-23-N	1.875	1.865	1.875	1.883	1.887	0.500	0.048	Cold Rolled Steel	Nickel	0	4-5 Weeks for <= 13195 7-8 Weeks for > 13195	Price
5791-23-Z2	1.875	1.865	1.875	1.883	1.887	0.500	0.048	Cold Rolled Steel	Zinc Type II	0	4-5 Weeks for <= 13195 7-8 Weeks for > 13195	Price
5791-23-Z3	1.875	1.865	1.875	1.883	1.887	0.500	0.048	Cold Rolled Steel	Zinc Type III	0	4-5 Weeks for <= 13195 7-8 Weeks for > 13195	Price
5791-35	2	1.990	2	2.008	2.012	0.500	0.048	Cold Rolled Steel		2477	In Stock - Ready To Ship!	Price
5791-35-BO	2	1.990	2	2.008	2.012	0.500	0.048	Cold Rolled Steel	Black Oxide	0	4-5 Weeks	Price

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