Bulkhead Nut for SMA & RP-SMA: Larger version 11mm diameter

Bulkhead Nut for RP-SMA & SMA:  11mm from flat to flat

• Larger nut version for RP-SMA-female and SMA female connector:
• This hex nut for SMA and RP-SMA measures 11mm across the opposite flats, whereas the standard hex nut for SMA / RPSMA is 5/16 inch (0.3125 inch / 7.9 mm) across opposite flats.
• The inside diameter is 6mm, to clear the threads on the female connector.
• Bulkhead nut & washer to mount connector on enclosure or PCB. SMA and RP-SMA use the same hex nut and washer set. 

The purposes of the bulkhead on an SMA-female or RP-SMA-female are to:

• Enable the connector to serve as a mounting device, such as to mount the cable to an enclosure, case or Printed Circuit Board (PCD).
• Weatherproofing: Seal the hole where the connector is mounted, by placing an O-ring between the wall of the enclosure and the O-ring.

The bulkhead does not in any way interfere with the ability of a female connector to properly "mate" with a male connector: In other words, a female connector with a bulkhead mates/connects exactly as well as a female connector without a bulkhead.

RoHS and REACH compliant: All of our antenna cables and RF adapters are from of heavy metals and compliant with RoHS and REACH.

RELATED PRODUCT OPTIONS

• Rubber waterproof O-ring seal can be purchased as a standalone item.

Gold-Plated Brass & Nickel-Plated Brass Options

• All of our Brass options are gold-plated. Gold-plating is better in appearance and more expensive than nickel-plated one.
• For indoor applications: Gold-plated brass alloy is the best option, because gold-plating is more attractive.
• For outdoor applications: Nickel-plated brass is the best option to weatherproof SMA and RP-SMA antenna connectors (read more below).

Rust Proofing and Corrosion-Protection: Best Options Among Nickel, Gold-Plated Brass & Brass Alloys:

• Nickel-plated brass is the most corrosion-resistant option:
• Nickel does not decompose as it oxidizes, but forms a layer of nickel-oxide that prevents further oxidation from occurring.
• Nickel-plating is achieved by electro-plating the brass nuts and washers with a thin layer of nickel.
• The result is nuts & washers that are highly resistant to rust /oxidation and verdigris (those green spots that show up on old brass)
• Rust Proofing and Corrosion-Protection is Achieved in our 100% Brass w/Gold Plate Version By:
• Keeping zinc content below 15%
• Adding in other metals to the alloy such as arsenic, phosphorus, antimony, and tin

With Zinc content below 15%, brass alloys can be rust-proof as long as:

1. Aeration is kept at a minimum.
2. The brass is kept away from oxidizing materials that include cyanides, ammonia, dichromates, and nitric acid.
3. Reactive materials such as acetylene, silver salts, mercury, hydrogen sulphide, and sulphur are not present
4. The components are kept away from salt, chemicals in the air, tap water, and rainwater.