RC Series

Plastic End Caps for Product Protection

Electrical Connector Caps & Covers

When you need reliable protection for your electrical connectors, Polymer Molding Inc. has got you covered. RC Series electrical connector caps and covers mate with male-threaded electrical connectors. Polymer Molding always strives to make our products reliable and secure, which is why our electrical connector caps feature a flange located on the top to allow for easy removal of the cover.

The versatility of this round design also allows our plastic connector caps to be useful in numerous situations for electrical connectors. Whatever the situation you need electrical connector dust caps for, Polymer Molding has the part for you.

Below, you can read about the characteristics of our electrical connector covers and caps, view our available parts, and put in a purchase order. If you have more questions or would like to request some samples of our products, contact our staff and experience our dedication to customer service.

Typical wall thickness: .032
Color: Red
Material: Low Density Polyethylene
LDPE service temperature: 150° F (66° C)
Applicable specs: MS-90376-R, MS-25178, NAS-813, NAS-831
Conductive and static dissapative options are available (consult factory for details)
RoHS Compliant

Skim the charts below to determine the exact plastic connector covers and caps you need, request a sample, and move forward with your purchase.

Product Options

Please confirm that your Part Number is correct and adjust the other selections below to meet your application's requirements.

Part Number

Package Size

Make Your Selection Below

Standard LDPE

PART NO.	COLOR	MIL-SPEC MS90376	TO CAP THREAD SIZE	A	B	C	D	PRODUCT OPTIONS
PART NO.	COLOR	MIL-SPEC MS90376	TO CAP THREAD SIZE	in.	mm.	in.	mm.	PRODUCT OPTIONS		in.	mm.	in.	mm.
RC-1/2	Red	MS90376-8R	1/2"	0.740	18.796	0.500	12.700	0.480	12.192	0.540	13.716	Carton	7,000	1	1,000	100	147.70	66.60	23.30
RC-9/16	Red	MS90376-9R	9/16"	0.778	19.761	0.500	12.700	0.555	14.097	0.627	15.926	Carton	6,000	1	1,000	100	142.20	74.50	26.06
RC-5/8	Red	MS90376-10R	5/8"	0.840	21.336	0.500	12.700	0.605	15.367	0.665	16.891	Carton	4,500	1	1,000	100	115.15	77.70	27.16
RC-3/4	Red	MS90376-12R	3/4"	0.955	24.257	0.500	12.700	0.730	18.542	0.785	19.939	Carton	4,000	1	1,000	100	98.80	77.70	27.16
RC-7/8	Red	MS90376-14R	7/8"	1.125	28.575	0.500	12.700	0.855	21.717	0.910	23.114	Carton	2,500	1	500	50	84.00	54.75	19.17
RC-1	Red	MS90376-16R	1"	1.220	30.988	0.500	12.700	0.980	24.892	1.035	26.289	Carton	2,000	1	500	50	75.20	59.05	20.68
RC-1-1/8	Red	MS90376-18R	1 1/8"	1.330	33.782	0.562	14.275	1.110	28.194	1.165	29.591	Carton	1,500	1	500	50	63.15	66.40	23.23
RC-1-3/16	Red	MS90376-19R	1 3/16"	1.400	35.560	0.560	14.224	1.183	30.048	1.233	31.318	Carton	2,500	1	500	50	115.00	72.50	25.37
RC-1-1/4	Red	MS90376-20R	1 1/4"	1.465	37.211	0.562	14.275	1.230	31.242	1.301	33.045	Carton	2,500	1	300	30	130.00	49.08	17.17
RC-1-3/8	Red	MS90376-22R	1 3/8"	1.590	40.386	0.562	14.275	1.350	34.290	1.410	35.814	Carton	2,000	1	300	30	110.00	51.87	18.16
RC-1-7/16	Red	MS90376-23R	1 7/16"	1.650	41.910	0.560	14.224	1.428	36.271	1.478	37.541	Carton	1,000	1	200	20	68.40	42.98	15.05
RC-1-1/2	Red	MS90376-24R	1 1/2"	1.704	43.282	0.562	14.275	1.470	37.338	1.532	38.913	Carton	2,000	1	300	30	153.60	72.42	25.36
RC-1-9/16	Red	MS90376-25R	1 9/16"	1.730	43.942	0.500	12.700	1.549	39.345	1.599	40.615	Carton	2,500	1	500	50	247.00	124.00	43.44
RC-1-5/8	Red	MS90376-26R	1 5/8"	1.910	48.514	0.560	14.224	1.613	40.970	1.710	43.434	Carton	1,000	1	200	20	94.00	59.14	20.71
RC-1-3/4	Red	MS90376-28R	1 3/4"	1.950	49.530	0.560	14.224	1.720	43.688	1.790	45.466	Carton	1,000	1	200	20	115.30	72.53	25.39
RC-2	Red	MS90376-32R	2"	2.220	56.388	0.560	14.224	1.965	49.911	2.040	51.816	Carton	1,000	1	200	20	150.40	94.54	33.09
RC-2-1/4	Red	MS90376-36R	2 1/4"	2.430	61.722	0.600	15.240	2.215	56.261	2.290	58.166	Carton	1,000	1	200	20	200.30	126.03	44.12
RC-2-1/2	Red	MS90376-40R	2 1/2"	2.680	68.072	0.620	15.748	2.456	62.382	2.520	64.008	Carton	1,000	1	200	20	228.10	143.48	50.22
RC-2-3/4	Red	MS90376-44R	2 3/4"	2.960	75.184	0.600	15.240	2.720	69.088	2.810	71.374	Carton	500	1	100	10	144.05	90.60	31.72
RC-3	Red	MS90376-48R	3"	3.230	82.042	0.600	15.240	2.960	75.184	3.040	77.216	Carton	500	1	100	10	147.25	92.62	32.42
RC-4	Red	MS90676-64R	4"	4.160	105.664	1	25.400	3.940	100.076	4.010	101.854	Carton	200	1	40	5	79.16	49.78	21.81

Static Dissipative LDPE

PART NO.	COLOR	TO CAP THREAD SIZE	A	B	C	D	PRODUCT OPTIONS
PART NO.	COLOR	TO CAP THREAD SIZE	in.	mm.	in.	mm.	PRODUCT OPTIONS		in.	mm.	in.	mm.
RC-1/2-DIS	Pink	N/A	1/2"	0.740	18.796	0.500	12.700	0.480	12.192	0.540	13.716	Carton	7,000	1	1,000	100	511.00	234.20	77.98
RC-9/16-DIS	Pink	N/A	9/16"	0.778	19.761	0.500	12.700	0.555	14.097	0.627	15.926	Carton	6,000	1	1,000	100	456.00	243.60	81.26
RC-5/8-DIS	Pink	N/A	5/8"	0.840	21.336	0.500	12.700	0.605	15.367	0.665	16.891	Carton	4,500	1	1,000	100	355.95	253.80	84.54
RC-3/4-DIS	Pink	N/A	3/4"	0.955	24.257	0.500	12.700	0.730	18.542	0.785	19.939	Carton	4,000	1	1,000	100	333.20	267.10	89.08
RC-7/8-DIS	Pink	N/A	7/8"	1.125	28.575	0.500	12.700	0.855	21.717	0.910	23.114	Carton	2,500	1	500	50	219.00	140.05	46.82
RC-1-DIS	Pink	N/A	1"	1.220	30.988	0.500	12.700	0.980	24.892	1.035	26.289	Carton	2,000	1	500	50	215.20	155.95	51.99
RC-1-1/8 DIS	Pink	N/A	1 1/8"	1.330	33.782	0.562	14.275	1.110	28.194	1.165	29.591	Carton	1,500	1	500	50	368.55	171.50	71.60
RC-1-3/16-DIS	Pink	N/A	1 3/16"	1.400	35.560	0.560	14.224	1.183	30.048	1.233	31.318	Carton	2,500	1	500	50	383.25	245.70	81.89
RC-1-1/4-DIS	Pink	N/A	1 1/4"	1.465	37.211	0.562	14.275	1.230	31.242	1.301	33.045	Carton	2,500	1	300	30	294.75	113.40	37.82
RC-1-3/8-DIS	Pink	N/A	1 3/8"	1.590	40.386	0.562	14.275	1.350	34.290	1.410	35.814	Carton	2,000	1	300	30	259.60	124.86	41.60
RC-1-7/16-DIS	Pink	N/A	1 7/16"	1.650	41.910	0.560	14.224	1.428	36.271	1.478	37.541	Carton	1,000	1	200	20	148.50	95.20	31.72
RC-1-1/2-DIS	Pink	N/A	1 1/2"	1.704	43.282	0.562	14.275	1.470	37.338	1.532	38.913	Carton	2,000	1	300	30	285.40	137.25	48.03
RC-1-9/16-DIS	Pink	N/A	1 9/16"	1.730	43.942	0.500	12.700	1.549	39.345	1.599	40.615	Carton	2,500	1	500	50	395.25	253.40	88.69
RC-1-5/8-DIS	Pink	N/A	1 5/8"	1.910	48.514	0.560	14.224	1.613	40.970	1.710	43.434	Carton	1,000	1	200	20	165.90	106.40	37.24
RC-1-3/4-DIS	Pink	N/A	1 3/4"	1.950	49.530	0.560	14.224	1.720	43.688	1.790	45.466	Carton	1,000	1	200	20	174.00	111.52	39.03
RC-2-DIS	Pink	N/A	2"	2.220	56.388	0.560	14.224	1.965	49.911	2.040	51.816	Carton	1,000	1	200	20	238.30	152.82	53.48
RC-2-1/4-DIS	Pink	N/A	2 1/4"	2.430	61.722	0.600	15.240	2.215	56.261	2.290	58.166	Carton	1,000	1	200	20	317.70	203.64	71.27
RC 2-1/2-DIS	Pink	N/A	2 1/2"	2.680	68.072	0.620	15.748	2.456	62.382	2.520	64.008	Carton	1,000	1	200	20	375.44	240.66	84.23
RC-2-3/4-DIS	Pink	N/A	2 3/4"	2.960	75.184	0.600	15.240	2.720	69.088	2.810	71.374	Carton	500	1	100	10	228.30	146.37	51.23
RC-3-DIS	Pink	N/A	3"	3.230	82.042	0.600	15.240	2.960	75.184	3.040	77.216	Carton	500	1	100	10	233.35	149.63	52.37
RC-4-DIS	Pink	N/A	4"	4.160	105.664	1	25.400	3.940	100.076	4.010	101.854	Carton	200	1	40	5	129.18	82.82	36.24

Conductive LDPE

PART NO.	COLOR	TO CAP THREAD SIZE	A	B	C	D	PRODUCT OPTIONS
PART NO.	COLOR	TO CAP THREAD SIZE	in.	mm.	in.	mm.	PRODUCT OPTIONS		in.	mm.	in.	mm.
RC-1/2-CON	Black	N/A	1/2"	0.740	18.796	0.500	12.700	0.480	12.192	0.540	13.716	Carton	7,000	1	1,000	100	728.00	233.80	81.89
RC-9/16-CON	Black	N/A	9/16"	0.778	19.761	0.500	12.700	0.555	14.097	0.627	15.926	Carton	6,000	1	1,000	100	478.95	242.80	85.12
RC-5/8-CON	Black	N/A	5/8"	0.840	21.336	0.500	12.700	0.605	15.367	0.665	16.891	Carton	4,500	1	1,000	100	384.75	274.10	95.92
RC-3/4-CON	Black	N/A	3/4"	0.955	24.257	0.500	12.700	0.730	18.542	0.785	19.939	Carton	4,000	1	1,000	100	360.40	288.80	101.07
RC-7/8-CON	Black	N/A	7/8"	1.125	28.575	0.500	12.700	0.855	21.717	0.910	23.114	Carton	2,500	1	500	50	238.50	152.95	53.54
RC-1-CON	Black	N/A	1"	1.220	30.988	0.500	12.700	0.980	24.892	1.035	26.289	Carton	2,000	1	500	50	210.60	168.70	59.05
RC-1-1/8-CON	Black	N/A	1 1/8"	1.330	33.782	0.562	14.275	1.110	28.194	1.165	29.591	Carton	1,500	1	500	50	173.85	185.70	64.99
RC-1-3/16-CON	Black	N/A	1 3/16"	1.400	35.560	0.560	14.224	1.183	30.048	1.233	31.318	Carton	2,500	1	500	50	414.25	265.65	88.57
RC-1-1/4-CON	Black	N/A	1 1/4"	1.465	37.211	0.562	14.275	1.230	31.242	1.301	33.045	Carton	2,500	1	300	30	318.75	122.64	40.87
RC-1-3/8-CON	Black	N/A	1 3/8"	1.590	40.386	0.562	14.275	1.350	34.290	1.410	35.814	Carton	2,000	1	300	30	280.80	135.03	47.26
RC-1-7/16-CON	Black	N/A	1 7/16"	1.650	41.910	0.560	14.224	1.428	36.271	1.478	37.541	Carton	1,000	1	200	20	151.80	97.30	35.23
RC-1-1/2-CON	Black	N/A	1 1/2"	1.704	43.282	0.562	14.275	1.470	37.338	1.532	38.913	Carton	2,000	1	300	30	308.80	148.47	49.51
RC-1-9/16-CON	Black	N/A	1 9/16"	1.730	43.942	0.500	12.700	1.549	39.345	1.599	40.615	Carton	2,500	1	500	50	427.50	274.05	91.34
RC-1-5/8-CON	Black	N/A	1 5/8"	1.910	48.514	0.560	14.224	1.613	40.970	1.710	43.434	Carton	1,000	1	200	20	179.50	115.08	40.28
RC-1-3/4-CON	Black	N/A	1 3/4"	1.950	49.530	0.560	14.224	1.720	43.688	1.790	45.466	Carton	1,000	1	200	20	188.10	120.62	42.21
RC-2-CON	Black	N/A	2"	2.220	56.388	0.560	14.224	1.965	49.911	2.040	51.816	Sample	1,000	1	200	20	242.90	155.76	54.51
RC-2-1/4-CON	Black	N/A	2 1/4"	2.430	61.722	0.600	15.240	2.215	56.261	2.290	58.166	Kit Pack	1,000	1	200	20	316.50	202.94	71.03
RC-2-1/2-CON	Black	N/A	2 1/2"	2.680	68.072	0.620	15.748	2.456	62.382	2.520	64.008	Carton	1,000	1	200	20	393.90	252.50	88.37
RC-2-3/4-CON	Black	N/A	2 3/4"	2.960	75.184	0.600	15.240	2.720	69.088	2.810	71.374	Carton	500	1	100	10	227.60	145.92	51.07
RC-3-CON	Black	N/A	3"	3.230	82.042	0.600	15.240	2.960	75.184	3.040	77.216	Carton	500	1	100	10	232.50	149.07	52.17
RC-4-CON	Black	N/A	4"	4.160	105.664	1	25.400	3.940	100.076	4.010	101.854	Carton	200	1	40	5	128.80	82.59	36.13

More Options

Tapered Caps

Tapered Series

End Caps

C Series

Long Plastic End Caps

CL Series

CS Series Caps

CS Series

MVC Series Caps

MVC Series

Covers All Threads Caps

CAT Series

Standard Threaded Plastic Caps

SC Series

PC Series Pipe Caps

PC Series

FS Series Seal Caps

FS Series

FC Series Flange Caps

FC Series

FCL Series Long Flange Caps

FCL Series

Tear Tab Caps

TC Series

SFC Series Split Flange Caps

SFC Series

FW Series Flange Washers

FW Series

VINYL END CAPS

VC Series

Rectangular Vinyl Caps

VF Series

Vinyl Grab Tab Caps

VGT Series

Vinyl Caps with Pull Tabs

VPT Series

SLC Series – Silicone Rubber Caps

SLC Series

SWC Series – Silicone Washer Caps

SWC Series

SFEC Series – Flat End Cap

SFEC Series

Silicone Flanged Caps

SLFC Series End Caps

SSQ Series – Silicone Square Caps

SSQ Series

SSRC Series – Silicone Snap Ring Caps

SSRC Series

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