MIL-DTL-38999 Series I · catalog configuration
MS27656T21B16SN
MS27656T21B16SN is a MIL-DTL-38999 Series I back-panel wall-mount receptacle. The cited catalog lists shell size 21, insert arrangement 16, 16 positions (16×16), and s (crimp socket) termination with bayonet coupling. Confirm the mating half, key position and panel interface against the controlled drawing before ordering.
Product number MS27656T21B16SN
- Series
- Series I
- Shell / insert
- 21 / 16
- Contact positions
- 16 positions; 16×16
- Material / finish
- Aluminum alloy; olive drab cadmium over nickel base
Description
MS27656T21B16SN is a MIL-DTL-38999 Series I back-panel wall-mount receptacle. The cited catalog lists shell size 21, insert arrangement 16, 16 positions (16×16), and s (crimp socket) termination with bayonet coupling. Confirm the mating half, key position and panel interface against the controlled drawing before ordering. For a cross-reference or compatible-supply review, send the mating code, drawing or clear product photo, quantity, and document requirements. Do not treat family-level catalog data as qualification or acceptance evidence for a supplied unit.
Configuration checklist
- Match the full ordering code and insert face to the supplied drawing.
- Confirm the mating half, contact gender, key position and coupling interface.
- Check shell style, rear configuration, cable exit and any accessory interface.
- Request the documents required for the offered unit; catalog values are not unit test results.
Technical Data
Ordering-code and insert data are catalog references. Electrical, environmental and mating-life values shown as catalog or family figures do not certify the supplied unit. Confirm the exact configuration and required evidence against its controlled drawing.
| Series and shell style | MIL-DTL-38999 Series I; Rear wall-mount receptacle |
|---|---|
| Coupling | Bayonet |
| Rear configuration / finish codes | T rear / B finish |
| Shell size / insert arrangement | 21 / 16 |
| Contact quantity and size mix | 16 positions; 16×16 |
| Contact type / termination | S (crimp socket) |
| Keying / option | N |
| Shell material and finish | Aluminum alloy; olive drab cadmium over nickel base |
| Insert service rating | II |
| Catalog withstand voltage at sea level | 2300 V |
| Catalog withstand voltage at 21 km | 1000 V |
| Catalog current rating by contact size | 16: 13 A/contact |
| Catalog contact resistance by size | 16: ≤2.5 mΩ |
| Catalog operating temperature | -65 to +175 °C |
| Catalog salt spray | 500 h |
| Family catalog mating life | ≥500 mating cycles (family catalog) |
| Family catalog insulation resistance | ≥5000 MΩ normal; ≥100 MΩ humid (family, own pp.5/28) |
| Family catalog shell continuity | ≤2.5 mΩ |
| Family catalog EMI shielding | ≥85 dB (100 MHz–1 GHz); ≥50 dB (1–10 GHz) (family, own pp.5/28) |
| Catalog drawing reference | Own 2025 pp.16-18 |
| Rear drawing callout (reference only) | Catalog drawing callout 1.1875-18; verify the accessory interface against the controlled drawing. |
Applications
These are selection and sourcing contexts for the listed catalog configuration. Suitability depends on the equipment interface, operating conditions and supplied-item documentation.
Buyer Q&A
What does MS27656T21B16SN identify?
The catalog identifies MS27656T21B16SN as a MIL-DTL-38999 Series I rear wall-mount receptacle with shell size 21 and insert arrangement 16.
How many contacts are listed for MS27656T21B16SN?
The cited catalog lists 16 positions in insert 16 (16×16); termination code S (crimp socket) is shown. Verify the offered item drawing.
What should be checked when selecting MS27656T21B16SN?
Confirm the mating half, key position and panel interface against the controlled drawing before ordering. Confirm rear configuration and finish codes separately; family values are not test reports for an offered unit.
What information should an RFQ for MS27656T21B16SN include?
Send complete code MS27656T21B16SN, mating-half code, panel or cable details, quantity, controlled drawing/photo, and document requirements.
Similar Products
Compare adjacent catalog configurations and confirm mating, keying and rear interface by drawing.
MS27656T21B16SN · RFQ
Send the exact drawing and mating requirement
Include the mating part, cable or panel details, quantity and documentation required for your project.