HMS31 Threaded Circular Connectors (MIL-DTL-5015 Type)
MIL-DTL-5015 type · threaded · contacts up to 150 A
HMS31-K Reverse-Bayonet Circular Connectors, Solder Contacts
Reverse bayonet · solder contacts · IP65 · UL94 V-0
HMS31-K is the reverse-bayonet version of our MIL-DTL-5015-type connectors, with solder contacts for fast mating and unmating under vibration. It mates with our HMS31-KY crimp series and is sealed to IP65, with UL94 V-0 insulation and resistance to fuels, mineral oils, acids and alkalis.
- Coupling
- Reverse bayonet
- Shell sizes
- 8S to 40
- Current rating
- 13–150 A
- Test voltage
- Up to 7000 V
- Temperature
- −55 to +125 °C
- Protection
- IP65
Request a quoteRequest drawingDownload datasheet (PDF)PDF, 218 KB
Key features
- Reverse-bayonet coupling for fast mating and unmating
- Solder contacts from size 16 (13 A) to size 0 (150 A)
- Mates with our HMS31-KY crimp connectors
- IP65; UL94 V-0 flame rating
- Resistant to petrol, mineral oil, acids and alkalis
- Dry heat +100 °C for 96 h
Specifications
| Parameter | Value | Condition |
|---|---|---|
| Test voltage | 1000–7000 V | By service rating — see service ratings |
| Insulation resistance | ≥ 5000 MΩ |
| Parameter | Value | Condition |
|---|---|---|
| Ingress protection | IP65 | |
| Flame rating | UL94 V-0 | |
| Fluid resistance | Petrol, mineral oil, acids, alkalis | |
| Dry heat | +100 °C, 96 h | |
| Operating temperature | −55 to +125 °C | |
| Durability | 500 mating cycles | |
| Vibration | Sine 10–100 Hz, 20 g | |
| Shock | 30 g |
MIL-DTL-5015 (type) — Insert arrangements and service ratings follow the MIL-DTL-5015 system.
Parameters not listed above — for example vibration level, leak rate or other environmental tests — can be tested to your requirements, including third-party testing.
Service ratings
Each insert arrangement has a service rating that sets its working and test voltage.
| Service rating | Test voltage | Working voltage DC | Working voltage AC |
|---|---|---|---|
| Instrument | 1000 V | 250 V | 200 V |
| A | 2000 V | 700 V | 500 V |
| D | 2800 V | 1250 V | 900 V |
| E | 3500 V | 1750 V | 1250 V |
| B | 4500 V | 2450 V | 1750 V |
| C | 7000 V | 4200 V | 3000 V |
Wire sizes
| Contact size | Solder cup Ø | Wire | Cable OD |
|---|---|---|---|
| 16 | 1.8 mm | AWG 22–16 (≤ 1.3 mm²) | 1.7–3.3 mm |
| 12 | 2.9 mm | AWG 14–12 (≤ 3.5 mm²) | 2.9–4.3 mm |
| 8 | 5.3 mm | AWG 10–8 (≤ 8.0 mm²) | 4.2–6.4 mm |
| 4 | 8.5 mm | AWG 6–4 (≤ 22 mm²) | 7.0–9.4 mm |
| 0 | 11.8 mm | AWG 2–0 (≤ 50 mm²) | 10.6–14.0 mm |
Versions
| Series code | Version | Notes |
|---|---|---|
| 3100 | Wall-mount square-flange receptacle | |
| 3101 | In-line (cable) receptacle | |
| 3102 | Box-mount square-flange receptacle | |
| 3106 | Straight plug | |
| 3108 | 90° plug |
Contact sizes and current ratings
| Contact size | Engaging diameter | Contact resistance | Current rating | Contact retention | Wire size |
|---|---|---|---|---|---|
| 16 | 1.6 mm | 1.05 mΩ | 13 A | 35 N | — |
| 12 | 2.4 mm | 0.57 mΩ | 23 A | 55 N | — |
| 8 | 3.6 mm | 0.2 mΩ | 46 A | 80 N | — |
| 4 | 5.7 mm | 0.1 mΩ | 80 A | 90 N | — |
| 0 | 9.1 mm | 0.05 mΩ | 150 A | 95 N | — |
How to order
HMS [type] [backshell] K [shell]-[arrangement] [contact] [key] [insert]
Example: HMS3106AK20-27PW — Straight plug, solid backshell, reverse bayonet, shell 20, arrangement 20-27, pin contacts, key W
| Code segment | Options |
|---|---|
| Type | |
| K | |
| Contact | |
| Key |
Typical applications
- Rail vehicle equipment
- Machine tools and CNC
- Industrial automation
- Power distribution
Frequently asked questions
What is the difference between HMS31-K and HMS31-KY?
Both use reverse-bayonet coupling and mate with each other. HMS31-K has solder contacts; HMS31-KY has crimp contacts and is sealed to IP67 for rail applications.
Selection guides
Related series
HMS31-KY Reverse-Bayonet Crimp Connectors for Rail Vehicles, IP67
Rail vehicles · NF F 61-030 · IP67 · crimp contacts
VG31 Reverse-Bayonet Connectors, VG 95234 Type, IP67
VG 95234 · reverse bayonet · IP67 · rail and maglev
From sample to production
Send your requirements
Part number, drawing, pin-out or a short description of your application.
Configuration and quote
Our engineers match the configuration and reply with a drawing and quotation.
Samples
Samples are built to order. The minimum order quantity is 10 pieces, and samples and production orders each take 4–8 weeks. Third-party testing to your specification is available on request.
Your approval
You test the samples in your own equipment and approve them.
Series production
Production follows the approved sample configuration, with machining, molding, plating and assembly in our own Shenyang factory.
Need a quote or a drawing?
Send your part number, pin-out or drawing. Every inquiry is acknowledged by email within 1 business day, and an engineer follows up with a matched configuration, drawing or quotation.
HMS31-KRequest a quote