Since its founding in the 1927, ESNA has solidified its position as the name in elastic stop nuts. Our famous Red Nylon Ring of Reliability™ is synonymous with durability, reliability, customer value and the highest quality. With over 46,000 individual part numbers, ESNA is also the world’s largest producer of custom designed, tight tolerance bushings to the major OEM’s. We also provide complementary products and service offerings that include the manufacturing of aerospace nut plates, clip nuts, aircraft fluid fittings, flanges, metal lock nuts and machined specials.

ESNA SERVES THE FOLLOWING INDUSTRIES

• Military and Defense
• Aerospace
• Electronics
• Industrial Solutions

ESNA has grown from a 1,000 square foot facility into a 130,000 square foot turnkey manufacturing center. Our large inventory of production machinery and finishing capabilities allow us to process 85 percent of our products in house. This capability makes a significant difference in our ability to match specifications and make deadlines. It’s what gives ESNA a compelling edge in meeting our customers’ needs and expectations.

WHAT WE DO

As the pioneer manufacturer of self-locking fasteners, ESNA offers the benefits of more than 85 years experience in the design and manufacture of vibration-proof fasteners and tight tolerance bushings. The extensive ESNA line includes standard and high tensile, extra thin, MIL approved parts, designed for the most difficult fastening applications as well as precision machined parts.

ESNA has also created full lines of miniaturized self-locking parts, such as hex and clinch nuts, for the electronics industry. ESNA has the ability to provide precision screw machine products to your specifications. Characteristics such as shape, material, finish, strength, weight and temperature limits, can be provided in the wide range of ESNA available parts.

ESNA Arkansas specializes in the manufacture of the famous ESNA red nylon insert self-locking fasteners for use on commercial-industrial applications and houses engineering, test laboratories, manufacturing, and sales groups. This facility offers the manufacturing community the most complete and reliable line of self-locking fasteners available today.

ESNA Texas has grown from a 1,000 square foot facility into a 130,000 square foot turnkey manufacturing center. Our large inventory of production machinery and finishing capabilities allow us to process 85% of our products in house. This capability makes a significant difference in our ability to match specifications and make deadlines. It’s what gives ESNA a compelling edge in meeting our customers’ needs and expectations.

ESNA’S RICH HISTORY

THE BEGINNING OF THE ELASTIC STOP NUT

The ESNA story began in 1927, when a young engineer named Carl Arthur Swanstrom arrived in the Unites States from Sweden. He brought with him a license to manufacture and sell a unique new self-locking fastener, which he called an “Elastic Stop Nut” because the nut remained “stopped” anywhere along the bolt threads. A non-damaging insert, fitted into the top of the nut, gripped the bolt threads firmly, holding the nut in position without seating against the work or using secondary locking devices.

EARLY 1930S
The next few years were spent perfecting an automatic assembly machine to insert the locking device into the top of the nut. Swanstrom perfected the machine in the early 1930s & four years later the Elastic Stop Nut Corporation of America was founded.

LATE 1930S
A threaded fastener, able to positively resist the loosening effect of vibration, had long been sought by manufacturers of every type of equipment. The elastic stop nut proved to be the answer—totally reliable, able to reduce maintenance costs & prevent equipment failure

MID 1940S
The outstanding performance of the elastic stop nut was further substantiated in 1943 when the U.S. Air Force tested and issued the first approval letter to use ESNA fasteners on military aircraft, both fuselage & engines. During World War II, thousands of elastic stop nuts were produced for every branch of the armed services. A staggering number of applications followed on ground support & electronic equipment.

1940S — 1990’S
In the years that followed, the ESNA line of standard products expanded to more than 25,000 parts. New types of self-locking fasteners were introduced to the product line. All metal locknuts were developed for applications with high heat or weight reduction requirements.

2011
Novaria Group purchased Fitz Aerospace in North Richland Hills Texas, the world’s largest producer of tight tolerance, custom designed bushings. For almost two decades, they have served a global customer base of both commercial and military aerospace programs and specialize in components for airframe, landing gear and engine manufacturers.

2016
Novaria Group purchased ESNA in Pocahontas Arkansas and combined their long standing history and capabilities with the former Fitz Aerospace. Now ESNA has three locations in Arkansas, Texas and a sales office in Canada, who continue to supply a wide range of nylon lock nuts, all metal lock nuts, precision bushings, fasteners, and specialty products for commercial and military markets.

Today, the company’s expanded product lines include a wide range of nylon insert lock nuts, metal lock nuts, fasteners, aerospace bushings, aircraft fluid fittings, flanges, metal lock nuts and machined special parts. The ESNA brand can be found in high-end aerospace, marine and electrical assemblies of all types.