G7 Glass Reinforced Silicone Tubes .250 inch wall thickness 1/4

NEMA G-7 Tubes satisfies MIL-I-24768/17 GSG, IEC 60893-3 Type 6 SI GC 201

G7 Tubes are manufactured of Glass Cloth Reinforced Silicone.

Composed of a continuous glass woven cloth base impregnated with a silicone resin binder, this grade has excellent heat and arc resistance.

Silicone thermosetting resins are among the best of all polymer materials in resistance to temperature.

Hence, silicone is broadly used for high temperature electronic applications requiring low electrical losses.

Silicone isn't as strong as epoxies and phenolics upon aging at lower temperatures but is stronger upon aging over 400° F.

G7 has extremely good dielectric loss properties under dry conditions and good electrical properties under humid conditions, although the percentage of change is high.

Tubes are made in 36" to 48" Lengths +/- 1.0" Length

G7 Silicone Tubes are available in the following Wall Thickness, Select:

Item Details	OD (in.)	ID (in.)
G7 Tubes - .250" Wall Thickness
KM-1776	1.000	.500
KM-1780	1.063	.562
KM-1785	1.125	.625
KM-12578	1.188	.688
KM-1792	1.250	.750
KM-12592	1.313	.812
KM-1797	1.375	.875
KM-12988	1.438	.938
KM-1802	1.500	1.000
KM-11943	1.563	1.063
KM-11942	1.625	1.125
KM-11941	1.688	1.188
KM-1806	1.750	1.250
KM-11940	1.813	1.313
KM-11939	1.875	1.375
KM-11936	1.937	1.438
KM-1810	2.000	1.500
KM-11937	2.062	1.563
KM-11947	2.125	1.625
KM-13194	2.188	1.688
KM-1814	2.250	1.750
KM-11946	2.313	1.813
KM-12598	2.375	1.875
KM-12597	2.438	1.938
KM-1818	2.500	2.000
KM-12596	2.563	2.063
KM-12595	2.625	2.125
KM-12594	2.688	2.188
KM-1822	2.750	2.250
KM-11928	2.813	2.313
KM-11938	2.875	2.375
KM-11613	2.938	2.438
KM-1826	3.000	2.500
KM-12577	3.063	2.563
KM-13169	3.125	2.625
KM-11950	3.188	2.688
KM-1830	3.250	2.750
KM-11949	3.313	2.813
KM-11948	3.375	2.875
KM-11945	3.437	2.938
KM-1834	3.500	3.000
KM-12593	3.563	3.063
KM-11415	3.625	3.125
KM-12590	3.688	3.188
KM-1838	3.750	3.250
KM-11615	3.813	3.313
KM-12588	3.875	3.375
KM-12600	3.938	3.438
KM-1842	4.000	3.500
KM-12586	4.063	3.563
KM-12585	4.125	3.625
KM-12584	4.188	3.688
KM-1846	4.250	3.750
KM-12583	4.313	3.813
KM-12582	4.375	3.875
KM-12591	4.438	3.938
KM-1850	4.500	4.000
KM-11423	4.563	4.062
KM-11918	4.625	4.125
KM-11426	4.688	4.188
KM-11416	4.750	4.250
KM-11407	4.813	4.313
KM-11418	4.875	4.375
KM-11419	4.938	4.438
KM-1853	5.000	4.500
KM-11420	5.063	4.563
KM-13149	5.125	4.625
KM-11422	5.188	4.688
KM-13000	5.250	4.750
KM-11424	5.312	4.813
KM-11425	5.375	4.875
KM-11455	5.437	4.938
KM-11486	5.563	5.063
KM-11612	5.625	5.125
KM-11614	5.688	5.187
KM-11944	5.750	5.250
KM-11421	5.812	5.313
KM-11916	5.875	5.375
KM-11926	5.937	5.438
KM-1859	6.000	5.500
KM-11906	6.063	5.563
KM-11934	6.125	5.625
KM-11933	6.187	5.688
KM-11932	6.250	5.750
KM-11931	6.313	5.813
KM-11930	6.375	5.875
KM-11924	6.438	5.938
KM-1862	6.500	6.000
KM-11929	6.563	6.063
KM-11898	6.625	6.125
KM-11925	6.688	6.188
KM-11935	6.750	6.250
KM-11923	6.813	6.313
KM-11922	6.875	6.375
KM-11921	6.938	6.438
KM-11920	7.000	6.500
KM-11919	7.063	6.563
KM-12298	7.125	6.625
KM-11896	7.187	6.688
KM-11417	7.250	6.750
KM-11914	7.312	6.813
KM-11913	7.375	6.875
KM-11912	7.438	6.938
KM-11911	7.500	7.000
KM-11910	7.562	7.063
KM-11909	7.625	7.125
KM-11904	7.687	7.188
KM-11907	7.750	7.250
KM-12581	7.813	7.313
KM-11905	7.875	7.375
KM-11915	7.938	7.438
KM-11903	8.000	7.500
KM-11902	8.063	7.563
KM-11901	8.125	7.625
KM-11900	8.188	7.688
KM-11899	8.250	7.750
KM-11908	8.313	7.813
KM-11963	8.375	7.875
KM-11958	8.437	7.938
KM-11956	8.500	8.000
KM-11954	8.625	8.125
KM-12974	8.688	8.188
KM-12125	8.750	8.250
KM-12980	8.813	8.313
KM-12968	8.875	8.375
KM-12967	8.938	8.438
KM-12966	9.000	8.500
KM-12965	9.063	8.563
KM-12964	9.125	8.625
KM-12963	9.188	8.688
KM-12962	9.250	8.750
KM-12961	9.312	8.813
KM-13168	9.375	8.875
KM-12972	9.438	8.938
KM-13176	9.500	9.000
KM-13180	9.563	9.063
KM-13181	9.625	9.125
KM-13182	9.687	9.188
KM-13183	9.750	9.250
KM-13005	9.813	9.313
KM-11917	9.875	9.375
KM-12040	9.937	9.438
KM-11998	10.000	9.500
KM-12039	10.062	9.563
KM-11964	10.125	9.625
KM-11951	10.187	9.688
KM-13179	10.250	9.750
KM-13201	10.313	9.813
KM-12124	10.375	9.875
KM-12123	10.437	9.938
KM-12122	10.500	10.000
KM-12410	10.563	10.063
KM-13139	10.625	10.125
KM-12373	10.688	10.188
KM-13166	10.750	10.250
KM-11927	10.813	10.313
KM-13188	10.875	10.375
KM-11435	10.937	10.438
KM-13178	11.000	10.500
KM-13191	11.062	10.563
KM-11960	11.125	10.625
KM-13193	11.188	10.688
KM-13195	11.250	10.750
KM-13196	11.312	10.813
KM-13197	11.375	10.875
KM-13192	11.437	10.938
KM-13170	11.500	11.000
KM-13171	11.562	11.063
KM-13172	11.625	11.125
KM-13173	11.687	11.188
KM-13174	11.750	11.250
KM-13184	11.813	11.313
KM-13190	11.875	11.375
KM-11523	11.938	11.438
KM-12183	12.000	11.500
KM-12182	12.063	11.563
KM-11183	12.125	11.625
KM-11509	12.187	11.688
KM-11510	12.250	11.750
KM-11511	12.313	11.813
KM-11512	12.375	11.875
KM-11513	12.438	11.938
KM-11514	12.500	12.000
KM-11515	12.563	12.063
KM-11962	12.625	12.125
KM-11528	12.688	12.188
KM-12186	12.750	12.250
KM-11524	12.813	12.313
KM-11530	12.875	12.375
KM-11531	12.937	12.438
KM-11440	13.000	12.500
KM-11441	13.062	12.563
KM-11442	13.125	12.625
KM-11443	13.187	12.688
KM-12177	13.250	12.750
KM-11444	13.312	12.813
KM-12176	13.375	12.875
KM-11445	13.437	12.938
KM-11516	13.500	13.000
KM-11989	13.562	13.063
KM-13187	13.625	13.125
KM-11959	13.687	13.188
KM-11953	13.750	13.250
KM-11952	13.812	13.312
KM-11986	13.875	13.375
KM-11988	13.938	13.438
KM-11997	14.000	13.500
KM-11996	14.062	13.563
KM-11995	14.125	13.625
KM-11994	14.187	13.688
KM-11993	14.250	13.750
KM-12184	14.312	13.813
KM-11990	14.375	13.875
KM-12185	14.437	13.938
KM-11987	14.500	14.000
KM-11983	14.562	14.063
KM-11961	14.625	14.125
KM-12156	14.687	14.188
KM-12168	14.750	14.250
KM-12154	14.812	14.313
KM-12153	14.875	14.375
KM-12152	14.937	14.438
KM-12188	15.000	14.500
KM-12187	15.062	14.562
KM-11974	15.125	14.625
KM-11992	15.187	14.688
KM-11802	15.250	14.750
KM-11803	15.312	14.813
KM-11793	15.375	14.875
KM-11805	15.437	14.938
KM-11806	15.500	15.000
KM-11807	15.563	15.063
KM-11808	15.625	15.125
KM-13189	15.687	15.188
KM-11810	15.750	15.250
KM-12126	15.812	15.313
KM-11773	15.875	15.375
KM-11804	15.937	15.438
KM-11800	16.000	15.500
KM-11774	16.062	15.563
KM-11775	16.125	15.625
KM-11776	16.187	15.688
KM-11777	16.250	15.750
KM-11778	16.312	15.813
KM-11779	16.375	15.875
KM-11780	16.437	15.938
KM-11792	16.500	16.000
KM-11782	16.562	16.063
KM-11783	16.625	16.125
KM-11750	16.687	16.188
KM-12297	16.750	16.250
KM-12296	16.812	16.313
KM-12295	16.875	16.375
KM-12294	16.937	16.438
KM-12037	17.000	16.500
KM-12074	17.062	16.563
KM-12075	17.125	16.625
KM-12076	17.187	16.688
KM-12077	17.250	16.750
KM-11813	17.312	16.813
KM-11749	17.375	16.875
KM-11801	17.437	16.938
KM-11751	17.500	17.000
KM-11812	17.625	17.125
KM-11763	17.687	17.188
KM-11795	17.750	17.250
KM-11796	17.812	17.313
KM-11797	17.875	17.375
KM-11798	17.937	17.438
KM-11811	18.062	17.563
KM-12078	18.125	17.625
KM-11784	18.187	17.688
KM-12135	18.250	17.750
KM-12131	18.312	17.813
KM-12107	18.375	17.875
KM-12109	18.437	17.938
KM-12143	18.500	18.000
KM-12142	18.562	18.063
KM-12141	18.625	18.125
KM-12140	18.687	18.188
KM-12139	18.750	18.250
KM-12102	18.812	18.313
KM-12137	18.875	18.375
KM-12103	18.937	18.438
KM-12127	19.000	18.500
KM-11809	19.062	18.563
KM-12128	19.125	18.625
KM-12129	19.187	18.688
KM-12130	19.250	18.750
KM-12144	19.312	18.812
KM-12132	19.375	18.875
KM-12121	19.437	18.938
KM-12134	19.500	19.000
KM-12138	19.562	19.062
KM-12114	19.625	19.125
KM-11785	19.687	19.187
KM-11786	19.750	19.250
KM-11787	19.812	19.312
KM-11788	19.875	19.375
KM-11789	19.937	19.437
KM-11790	20.000	19.500

Phenolic Tube Tolerances
		↓ Inside Diameter ↓
Outside Diameter	Turned OD Tolerance	Steel Mandrel	Built-up Mandrel
0.125" to 0.749"	±.005"	±.003"	-
0.750" to 1.999"	±.005"	±.004"	-
2.000" to 4.000"	±.008"	±.006"	-
4.001" - 12.000"	±.025" **	±.010"	-
12.001" - 18.000"	±.030" **	±.030"	±.060"
18.001" - 24.000"	±.035" **	±.040"	±.075"
24.001" - 48.000"	±.040" **	±.060"	±.090"
Tubes over 8.000" OD are supplied as wound, which are always fractions of an inch larger than stated OD. Tubes turned to the following OD tolerance can be quoted on request.