Sealed aviation connectors
Circular screw-lock connectors for outdoor lighting, control cabinets, marine and vehicle harnesses. Six shell sizes share one coupling system, so the shell diameter and the contact count decide the part.
Six shell sizes, one coupling system
SP13, SP16, SP17, SP20, SP21 and SP28 run from a 13 mm to a 28 mm shell. Each size takes its own set of contact counts — up to 9 on SP13, SP16 and SP17, up to 12 on SP21, up to 14 on SP20 and up to 26 on SP28 — and every size locks with the same bayonet-free screw collar, so a harness can change shell diameter without changing the way it couples.
Mounting decides the part number
The same shell is sold as a rear-nut panel socket, a four-hole flange socket, a round flange socket, or a straight inline pair for cable-to-cable joints, with right-angle versions of the larger shells. The plug and the panel socket are matched components: choose the panel cut-out first, then the plug body that mates with it.
What the listings publish
Ingress protection is IP68 on the sealed range, housings are PA66, and contacts are copper, gold-plated on the variants that state it. Rated current and voltage are printed per contact count rather than per family, so a quote is fixed against the exact variant you order.
Every model in this family, side by side
20 parts across 20 models, one row each. Sealing, contact count and electrical rating are exactly as published on the part page; a cell is blank where the listing does not state the figure. Prices are USD per piece, EXW Yueqing, lead time 10–20 days.
| Model | Series | Mounting | Contacts | Rated current | Rated voltage | Ingress protection | Min. order | Variants | EXW / pc |
|---|---|---|---|---|---|---|---|---|---|
 SP13-INSP13-IN inline aviation connector — IP68 | SP13 | inline | 1–14 pins | 5–25 A | 250–380 V | IP68 | 50 pcs | 88 | $4.05–$8.82USD / pc |
 SP13-RASP13-RA right-angle aviation connector — IP68 | SP13 | right-angle | 1–14 pins | 5–25 A | 250–380 V | IP68 | 50 pcs | 11 | $4.80–$7.77USD / pc |
 SP13-RNSP13-RN rear-nut aviation connector — IP68 | SP13 | rear-nut | 1–9 pins | 5–25 A | 250–380 V | IP68 | 50 pcs | 8 | $3.00–$4.26USD / pc |
 SP16-FLSP16-FL flange aviation connector — IP68 | SP16 | flange | 2–9 pins | 5–10 A | 250–380 V | IP68 | 50 pcs | 7 | $2.67–$4.20USD / pc |
 SP16-INSP16-IN inline aviation connector — IP68 | SP16 | inline | 2–9 pins | 5–10 A | 250–380 V | IP68 | 50 pcs | 28 | $2.63–$4.69USD / pc |
 SP16-RNSP16-RN rear-nut aviation connector — IP68 | SP16 | rear-nut | 2–9 pins | 5–10 A | 250–380 V | IP68 | 50 pcs | 7 | $2.67–$4.20USD / pc |
 SP16-STDSP16-STD straight aviation connector — IP68 | SP16 | straight | 2–9 pins | 5–10 A | 250–380 V | IP68 | 50 pcs | 7 | $2.67–$4.20USD / pc |
 SP17-INSP17-IN inline aviation connector — IP68 | SP17 | inline | 2–9 pins | 5–10 A | 250–380 V | IP68 | 50 pcs | 12 | $3.23–$5.07USD / pc |
 SP17-RNSP17-RN rear-nut aviation connector — IP68 | SP17 | rear-nut | 2–9 pins | 5–10 A | 250–380 V | IP68 | 50 pcs | 6 | $3.23–$4.50USD / pc |
 SP20-FLSP20-FL flange aviation connector — IP68 | SP20 | flange | 1–14 pins | 5–25 A | 250–380 V | IP68 | 50 pcs | 11 | $3.94–$6.72USD / pc |
 SP20-RASP20-RA right-angle aviation connector — IP68 | SP20 | right-angle | 1–14 pins | 5–25 A | 250–380 V | IP68 | 50 pcs | 11 | $5.93–$8.82USD / pc |
 SP20-RNSP20-RN rear-nut aviation connector — IP68 | SP20 | rear-nut | 1–14 pins | 5–25 A | 250–380 V | IP68 | 50 pcs | 11 | $4.05–$6.72USD / pc |
 SP20-SQSP20-SQ 4-hole flange aviation connector — IP68 | SP20 | 4-hole flange | 1–14 pins | 5–25 A | 250–380 V | IP68 | 50 pcs | 11 | $3.94–$6.72USD / pc |
 SP21-FLSP21-FL flange aviation connector — IP68 | SP21 | flange | 2–12 pins | 5–25 A | 250–380 V | IP68 | 50 pcs | 7 | $5.25–$6.75USD / pc |
 SP21-INSP21-IN inline aviation connector — IP68 | SP21 | inline | 2–12 pins | 5–25 A | 250–380 V | IP68 | 50 pcs | 7 | $4.88–$7.13USD / pc |
 SP21-RNSP21-RN rear-nut aviation connector — IP68 | SP21 | rear-nut | 2–12 pins | 5–25 A | 250–380 V | IP68 | 50 pcs | 7 | $4.88–$7.13USD / pc |
 SP28-RASP28-RA right-angle aviation connector — IP68 | SP28 | right-angle | 2–26 pins | 5–45 A | 250–380 V | IP68 | 50 pcs | 15 | $7.50–$12.38USD / pc |
 SP28-RNSP28-RN rear-nut aviation connector — IP68 | SP28 | rear-nut | 2–26 pins | 5–45 A | 250–380 V | IP68 | 50 pcs | 15 | $6.75–$11.25USD / pc |
 SP28-SQSP28-SQ 4-hole flange aviation connector — IP68 | SP28 | 4-hole flange | 2–26 pins | 5–45 A | 250–380 V | IP68 | 50 pcs | 15 | $6.75–$11.25USD / pc |
 SP28-STDSP28-STD straight aviation connector — IP68 | SP28 | straight | 2–26 pins | 5–45 A | 250–380 V | IP68 | 50 pcs | 15 | $6.75–$11.63USD / pc |
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Open familyNeed a variant that is not listed?
Cable size, mount and current rating are the three things that change an ordering code. Send them with the model number and the closest variant can be confirmed.