Souriau 8STA connectors are motorsport-specific circular connectors derived from MIL-DTL-38999 Series 1.5 — engineered by Souriau (now part of Eaton) for Formula 1, WRC, LMP, and GT3 teams. Used across engine control, data acquisition, power distribution, and bulkhead harness transitions throughout professional motorsport.
Shell sizes: 01–24
Contact sizes: 26 (3 A) · 22D (5 A) · 20 (7.5 A) · 16 (13 A) · 12 (23 A) · 4 (80 A)
Max contacts: 128 in a single body (shell 24, arrangement 24-35)
Sealing: IP67 · -55°C to +175°C · 500 mating cycles
Keying: 5-colour keyway system prevents mis-mating across multi-connector harnesses
XTRA Motorsport stocks the complete range — plugs, inline receptacles, bulkhead receptacles, and jam nut receptacles — across all shell sizes 01–24, all contact sizes, and all keyways. In EU stock — dispatched via DHL/UPS across Europe.
Contacts for size 22D and size 20 are MIL-SPEC (M39029 series) — stocked by XTRA Motorsport and shared with Deutsch Autosport AS Series connectors. The same contacts and crimp tools work in both series.
Body Styles
Code
Body Style
Description
0
Oval Flange Receptacle
Panel / bulkhead / firewall mount — two-hole bolt-down flange
1
In-Line Receptacle
Free-hanging inline receptacle for harness-to-harness connections
6
Plug
Free-hanging plug, mates onto body style 0 or 1 receptacle
7
Jam Nut Receptacle
Panel mount with jam nut — aperture mounting without a bolt-down flange
The first digit of an 8STA part number is the body style code: 8STA6-10-98PN = plug, 8STA1-10-98SN = inline receptacle, 8STA0-10-98SN = bulkhead receptacle.
Keyway Colour System
Five keyed orientations plus a universal option prevent mis-mating in multi-connector harness architectures. The keyway letter is the final character of the part number:
Keyway
Band Colour
Notes
N
Red
Dedicated / high-priority circuit
A
Yellow
General sensor — most common
B
Blue
Second sensor circuit
C
Orange
Third sensor circuit
D
Green
Fourth sensor circuit
U
Violet
Universal — plug (body style 6) only; mates with any keyway receptacle
U (Universal / Violet) keyway: A U-keyed plug mates with any other keyway receptacle (N, A, B, C, D). Used for test harnesses and service-park diagnostic rigs where a single connector lead must fit any circuit on the car. The U keyway is available on plugs (body style 6) only — there is no U-keyed 8STA receptacle.
Shell 08 restriction: keyways B, C, and U are not available on shell 08. Shell 08 supports keyways N, A, and D only.
Part Number Guide
Souriau 8STA part numbers follow a consistent structure:
Souriau 8STA and Deutsch Autosport AS Series connectors are both derived from MIL-DTL-38999 Series 1.5 and share identical shell geometry, keyway system, MIL-SPEC contacts, and crimp tooling — connectors from both series mate directly when shell size and keyway match. The same size 22D and size 20 MIL-SPEC contacts (M39029 series) and the same crimp tools work in both series without modification.
Souriau 8STA
Deutsch Autosport AS
Standard
MIL-DTL-38999 derivative
MIL-DTL-38999 Series 1.5 derivative
Shell geometry
Identical per shell size
Identical per shell size
Shell sizes
01–24
08–24
Direct intermatability
Yes — same shell + keyway
Yes — same shell + keyway
MIL-SPEC contacts (22D / 20)
Shared — M39029 series
Shared — M39029 series
Crimp tooling
Identical
Identical
Stocked at XTRA Motorsport
Yes — complete range
No
XTRA Motorsport stocks 8STA. When Deutsch Autosport AS Series connectors are specified, Souriau 8STA is the stocked equivalent — use 8STA directly.
Shell 06 — Intermateable with Deutsch ASL MicroLITE
The 8STA shell 06, arrangement 06-05 (5-way, size 26 contacts, 3 A) is directly intermateable with Deutsch ASL MicroLITE connectors — the connector bodies and keyway system are fully interchangeable between the two series. This makes 8STA 06-05 the stocked alternative when Deutsch ASL is specified and lead times are long.
Contact sizes differ between the two series (8STA uses size 26 / Deutsch ASL uses size 23) and are not interchangeable. The same heat shrink boots fit both — shell 06: Raychem 204W221-25-0 (straight), 224W221-25-0 (90°); HellermannTyton 1030-4-G (straight), 1181-4-G (90°).
Souriau 8STA connectors are widely used across professional motorsport wherever a sealed, lightweight, high-density circular connector is required:
Formula 1 and LMP prototypes — engine control units, data acquisition, power distribution module harnesses, and multi-circuit bulkhead transitions requiring maximum contact density in minimum space
WRC, WRC2, R5, and R2 rally — harness builds where IP67 sealing, vibration resistance, and rapid service-park connector changes via the keying system are all requirements; widely used across WRC-specification vehicles and regional rally series throughout Europe
GT3, GT4, and GT racing — sensor circuits, ECU interfaces, bulkhead transitions, and PDM wiring in GT3, GT4, and production-based GT series including DTM, Fanatec GT World Challenge, British GT, Italian GT, and Spanish GT championships
ECU harnesses — compatible with circular connector interfaces on MoTeC, AiM, Bosch MS/ME/MDG/MSC, Pi Research, and all major motorsport ECU and PDM platforms referencing MIL-DTL-38999-style circular connectors
Data acquisition systems — AiM, Cosworth, McLaren Applied Technologies; 8STA 06-05 arrangement is intermateable with Deutsch ASL MicroLITE, covering the majority of existing sensor harness interfaces
Firewall and bulkhead transitions — body style 0 (oval flange) and body style 7 (jam nut) provide IP67-rated sealed harness penetrations at firewall, footbox, and bulkhead panels; the keying system prevents mis-routing during assembly
High-current circuits — size 12 (23 A) contacts for fuel pump and cooling system wiring; size 4 (80 A) contacts in the 12-01 arrangement for high-load circuits including starter motors, alternators, and main power runs
Weight-critical harness builds — small shell sizes 01–06 provide significant mass savings in sensor-dense areas around the engine and driver cockpit; 1/3 turn bayonet coupling with colour-coded lock confirmation eliminates connector retention hardware
XTRA Motorsport — EU stock, dispatched to your workshop: The complete Souriau 8STA range is held in EU stock. Standard EU delivery via DHL/UPS to Germany, France, Italy, Spain, Poland, and all EU member states. No minimum order.
FAQ
What is the Souriau 8STA connector?
The Souriau 8STA is a motorsport-specific lightweight circular connector derived from MIL-DTL-38999 Series 1.5, engineered by Souriau (now part of Eaton) for high-performance motorsport applications — Formula 1, WRC, LMP, GT3. Available in shell sizes 01–24 with up to 128 contacts, IP67 rated, -55°C to +175°C, 500 mating cycles. The 1/3 turn bayonet coupling and colour-coded keyway system make it the standard circular connector in professional motorsport wiring harnesses worldwide.
What shell sizes are available for Souriau 8STA connectors?
The 8STA series covers shells 01, 02, 04, 06, 08, 10, 12, 14, 16, 18, 20, 22, and 24. Contact counts range from 3 contacts (shell 01) to 128 contacts (shell 24, arrangement 24-35). XTRA Motorsport stocks all shell sizes across plugs, inline receptacles, and bulkhead receptacles.
What is the difference between Souriau 8STA and Deutsch Autosport AS Series connectors?
Both derive from MIL-DTL-38999 Series 1.5 and share identical shell geometry, keyway system, MIL-SPEC contacts (M39029 series), and crimp tooling. Connectors from both series mate directly when shell size and keyway match. Souriau 8STA covers shells 01–24; Deutsch AS covers shells 08–24. XTRA Motorsport stocks Souriau 8STA — it is the direct in-stock equivalent for Deutsch AS Series specifications.
Are Souriau 8STA and Deutsch AS contacts and crimp tools interchangeable?
Yes — MIL-SPEC contacts (M39029 series, sizes 22D, 20, and 16) and crimp tooling are identical across both series. The same contacts, crimp tool M22520/2-01, and positioners work in both 8STA and Deutsch AS connectors without modification.
What keyway colours does the 8STA series use?
N (Red), A (Yellow), B (Blue), C (Orange), D (Green), and U (Violet / Universal). The U keyway is available on plugs (body style 6) only — a U-keyed plug mates with any keyway receptacle, making it standard for test harnesses and diagnostic equipment. Shell 08 restriction: B, C, and U keyways are not available on shell 08.
Are Souriau 8STA connectors IP67 rated?
Yes. All body styles — plug, inline receptacle, oval flange bulkhead receptacle, and jam nut receptacle — are IP67 sealed at -55°C to +175°C with a minimum of 500 mating cycles.
What crimping tools are needed for Souriau 8STA contacts?
Size 22D and size 20 contacts use crimp tool M22520/2-01. Positioner selection depends on contact size and type: 22D socket uses M22520/2-07, 22D pin uses M22520/2-09, size 20 socket and pin both use M22520/2-10. Insertion and removal: M81969/14-01 (Green/White) for size 22D; M81969/14-10 (Red/Orange) for size 20.
What heat shrink boots fit Souriau 8STA connectors?
Boot selection is shell-specific — see the boot reference table above. Examples: shell 10 uses Raychem 202K121-25-0 (straight and 90°), HellermannTyton 152-42-G (straight) or 1152-4-G (90°). Shell 06-05 arrangement uses Raychem 204W221-25-0 (straight) or 224W221-25-0 (90°), HellermannTyton 1030-4-G (straight) or 1181-4-G (90°) — the same boots as Deutsch ASL MicroLITE.
Can Souriau 8STA shell 06-05 connectors mate with Deutsch ASL MicroLITE connectors?
Yes — 8STA shell 6, arrangement 06-05 mates directly with Deutsch ASL MicroLITE connectors. The connector bodies and keyway system are fully interchangeable between the two series. Contacts differ (8STA uses size 26, 24–30 AWG; ASL uses size 23, 22–28 AWG) and are not interchangeable — each series uses its own contact part numbers.
Where can I buy Souriau 8STA connectors in Europe?
XTRA Motorsport stocks the complete Souriau 8STA range — all shell sizes 01–24, all contact arrangements, all keyways, and all body styles — from EU stock via DHL/UPS. We deliver to Germany, France, Italy, Spain, Poland, and all EU member states. No minimum order. Standard EU delivery applies; no customs paperwork within the EU.
