Description
EMCA CONNECTOR ACCESSORIES / B97-403
Blind-Hole Mounting Flanges & Nut Plates
A mounting flange with closed threaded holes for applications where through-hole fastening is unsuitable. The C-shaped plate sits behind the mounting panel and aligns with the receptacle flange, keeping the threaded fixings together for straightforward installation.
Configuration at a glance
- Product series: B97-403
- Shell sizes: 8, 9/10, 11/12, 13/14, 15/16, 17/18, 19/20, 21/22, 23/24, 25, 28, 32, 36
- Thread options: M for metric; U for UNC.
- Retention: Blind formed threads as standard; optional SL stainless steel self-locking wire inserts.
- Material: Aluminium alloy.
Material & finish options
| Code | Finish | Salt spray resistance | Conductive |
|---|---|---|---|
| 3 | Black anodized | 500+ hours | No |
| M | Clear passivation, SurTec 650 | 96 hours | Yes |
Both listed finishes are RoHS/REACH compatible. Other finishes are available on enquiry.
How to order
Choose the series, thread code, material/finish code and two-digit shell-size code, then add SL if required.
Order example: B97-403-M305
Blind-Hole version · metric thread · black anodized · shell size 15/16 (size code 05).
Add SL for self-locking thread inserts: B97-403-M305SL. Select screw length to suit the available blind-hole depth; screws must not bottom out.
Shell size codes & threads
| Shell size | Size code | Metric thread | UNC thread |
|---|---|---|---|
| 8 | 01 | M3 | 4-40 |
| 9/10 | 02 | M3 | 4-40 |
| 11/12 | 03 | M3 | 4-40 |
| 13/14 | 04 | M3 | 4-40 |
| 15/16 | 05 | M3 | 4-40 |
| 17/18 | 06 | M3 | 4-40 |
| 19/20 | 07 | M3 | 4-40 |
| 21/22 | 08 | M3 | 4-40 |
| 23/24 | 09 | M3 | 4-40 |
| 25 | 10 | M3 | 4-40 |
| 28 | 11 | M4 | 6-32 |
| 32 | 12 | M4 | 6-32 |
| 36 | 13 | M4 | 6-32 |
Connector selection
The mounting flange range supports square-flange receptacles across MIL-DTL-38999, MIL-DTL-26482, MIL-DTL-5015 and associated VG/JN standards. Match the connector mounting pattern, shell size, thread and screw length to the catalogue dimensions before ordering.
For selection support, send Bourne Aerospace the connector series, shell size, required finish, thread and quantity.
