Coaxial Adapters

Frontgrade provides adapters for test labs and systems used in high-performance commercial, military and space applications. Delivering superior electrical performance, these durable, precision coaxial test adapters function as connector-savers to protect expensive test equipment and panel connectors from damage and wear.

Constructed of gold-plated beryllium copper and stainless steel, our 50-ohm adapters operate from DC to 18 GHz. Interfaces conform to MIL-PRF-39012 and MIL-STD-348.

Frontgrade also supplies an extensive array of between-series system coaxial adapters for test equipment and high-power systems. We carry most commonly used connector types. All of our adapters are designed to mil-standard interfaces and many meet stringent MIL-T-81490 requirements.

Our most common test adapters are summarized below. Contact Frontgrade for part numbers for TR, SC, and other less common interfaces.

Precision 7mm

Adapter Type	Part Number	VSWR up to 18 GHz - Max	VSWR up to 18 GHz - Typ	Nominal (in.)	OD (mm)	Nominal (in.)	Length (mm)
7 mm -Nm	1601-0402	1.08	1.06	0.86	22	2.1	53
7 mm -Nf	1601-0409	1.08	1.06	0.86	22	2.5	64
7 mm -ETNCm	1601-0401	1.1	1.07	0.86	22	2.1	53
7 mm -ETNCf	1601-0408	1.1	1.07	0.86	22	2.5	64
7 mm -SMAm	1601-0403	1.1	1.08	0.86	22	2	51
7 mm -SMAf	1601-0407	1.1	1.08	0.86	22	2	51
7 mm -3.5 mm m	1601-0410	1.1	1.06	0.86	22	2.1	53
7 mm -3.5 mm f	1601-0411	1.1	1.06	0.86	22	2	51
7 mm -7 mm	1601-0404	1.07	1.05	0.86	22	2.2	56

Precision N

Adapter Type	Part Number	VSWR up to 18 GHz - Max	VSWR up to 18 GHz - Typ	Outer Dimension (in.)	Outer Dimension (mm)	Length (in.)	Length (mm)

Nm - ETNCm	1601-0201	1.11	1.08	0.79	20	1.9	48
Nm - ETNCf	1601-0208	1.11	1.08	0.79	20	2.4	61
Nm - SMAm	1601-0203	1.11	1.08	0.79	20	1.9	48
Nm - SMAf	1601-0207	1.11	1.08	0.79	20	1.8	46
Nm - 3.5 mm m	1601-0210	1.11	1.08	0.79	20	1.9	48
Nm - 3.5 mm f	1601-0211	1.11	1.08	0.79	20	1.9	48
Nf - ETNCm	1601-0901	1.11	1.09	0.79	20	2.4	61
Nf - ETNCf	1601-0908	1.11	1.09	0.79	20	2.8	71
Nf - SMAm	1601-0903	1.11	1.08	0.79	20	2.3	58
Nf - SMAf	1601-0907	1.11	1.08	0.79	20	2.3	58
Nf - 3.5 mm m	1601-0910	1.11	1.08	0.79	20	2.4	61
Nf - 3.5 mm f	1601-0911	1.11	1.08	0.79	20	2.3	58
Nm - Nf	1601-0209	1.09	1.06	0.79	20	2.4	61
Nm- Nm	1601-0202	1.09	1.06	0.79	20	1.9	48
Nf - Nf	1601-0909	1.09	1.06	0.79	20	2.8	71

Precision ETNC

Adapter Type	Part Number	VSWR up to 18 GHz - Max	VSWR up to 18 GHz - Typ	Outer Dimensions (in.)	Outer Dimensions (mm)	Length (in.)	Length (mm)
ETNCm - Nm	1601-0201	1.11	1.08	0.79	20	1.9	48
ETNCm - Nf	1601-0901	1.11	1.08	0.63	16	2.4	61
ETNCm - SMAm	1601-0103	1.13	1.1	0.63	16	1.9	48
ETNCm - SMAf	1601-0107	1.13	1.1	0.63	16	1.8	46
ETNCm - 3.5 mm m	1601-0110	1.13	1.09	0.63	16	1.9	48
ETNCm -3.5 mm f	1601-0111	1.13	1.09	0.63	16	1.9	48
ETNCf - Nm	1601-0208	1.11	1.09	0.63	16	2.4	61
ETNCf - Nf	1601-0908	1.11	1.09	0.63	16	2.8	71
ETNCf - SMAm	1601-0803	1.13	1.1	0.63	16	2.4	61
ETNCf - SMAf	1601-0807	1.13	1.1	0.63	16	2.3	58
ETNCf - 3.5 mm m	1601-0810	1.13	1.09	0.63	16	2.4	61
ETNCf - 3.5 mm f	1601-0811	1.13	1.09	0.63	16	2.4	61
ETNCm - ETNCf	1601-0108	1.13	1.1	0.63	16	2.4	61
ETNCm - ETNCm	1601-0101	1.13	1.1	0.63	16	1.9	48
ETNCf - ETNCf	1601-0808	1.13	1.1	0.63	16	2.9	74

Precision 3.5mm

Adapter Type	Part Number	VSWR up to 18 GHz - Max	VSWR up to 18 GHz - Typ	Outer Dimensions (in.)	Outer Dimensions (mm)	Length (in.)	Length (mm)
3.5 mm m - Nm	1601-0210	1.11	1.08	0.79	20	1.9	48
3.5 mm m - Nf	1601-0910	1.11	1.08	0.63	16	2.4	61
3.5 mm m - ETNCm	1601-0110	1.13	1.09	0.63	16	1.9	48
3.5 mm m - TNCf	1601-0810	1.13	1.09	0.63	16	2.4	61
3.5 mm m - SMAm	1601-1003	1.13	1.11	0.63	16	1.9	61
3.5 mm m - SMAf	1601-1007	1.13	1.11	0.63	16	1.8	46
3.5 mm f - Nm	1601-0211	1.11	1.08	0.63	16	1.9	48
3.5 mm f - Nf	1601-0911	1.11	1.08	0.63	16	2.3	58
3.5 mm f - ETNCm	1601-0111	1.13	1.09	0.63	16	1.9	48
3.5 mm f-TNCf	1601-0811	1.13	1.09	0.63	16	2.4	61
3.5 mm f - SMAm	1601-1103	1.13	1.11	0.63	16	1.8	46
3.5 mm f - SMAf	1601-1107	1.13	1.11	0.63	16	1.8	46
3.5 mm m - 3.5 mm f	1601-1011	1.13	1.07	0.63	16	1.9	48
3.5 mm m - 3.5 mm m	1601-1010	1.13	1.07	0.63	16	1.9	48
3.5 mm f - 3.5 mm f	1601-1111	1.13	1.07	0.63	16	1.8	46

Precision SMA

Adapter Type	Part Number	VSWR up to 18 GHz - Max	VSWR up to 18 GHz - Typ	Outer Dimensions (in.)	Outer Dimensions (mm)	Length (in.)	Length (mm)

SMAm - ETNCm	1601-0103	1.13	1.1	0.63	16	1.9	48
SMAm - ETNCf	1601-0803	1.13	1.1	0.63	16	2.4	61
SMAm - Nm	1601-0203	1.11	1.08	0.79	20	1.9	48
SMAm - Nf	1601-0903	1.11	1.08	0.63	16	2.3	58
SMAm - 3.5 mm m	1601-1003	1.13	1.1	0.63	16	1.9	48
SMAm - 3.5 mm f	1601-1103	1.13	1.1	0.63	16	1.8	46
SMAf - ETNCm	1601-0107	1.13	1.1	0.63	16	1.8	46
SMAf - ETNCf	1601-0807	1.13	1.1	0.63	16	2.3	58
SMAf - Nm	1601-0207	1.11	1.08	0.79	20	1.8	46
SMAf - Nf	1601-0907	1.11	1.08	0.63	16	2.3	58
SMAf - 3.5 mm m	1601-1007	1.13	1.1	0.63	16	1.8	46
SMAf - 3.5 mm f	1601-1107	1.13	1.1	0.63	16	1.8	46
SMAm - SMAf	1601-0307	1.13	1.11	0.63	16	1.8	46
SMAm - SMAm	1601-0303	1.13	1.11	0.63	16	1.8	46
SMAf - SMAf	1601-0707	1.13	1.11	0.63	16	1.7	43