Duraforce

What Duraforce does

DuraForce Fastener Systems, LLC is a privately held, Roanoke, Virginia-based company that designs and manufactures self-locking nut and threaded fastener systems engineered to prevent vibration loosening in bolted joints. The core DuraForce Fastener System pairs a tapered annulus extension on the nut with a matching compression collar (or tapered blind hole); when compressed, the annulus and collar store strain energy that is returned to the joint to counteract the side-sliding motion between nut and bolt threads that causes conventional fasteners to lose clamp load under vibration. Two product variants are sold: PermLok, a one-time permanent locking nut that achieves roughly 60% bolt pre-load through plastic deformation, and ReLok, a reusable variant with a smooth interior that maintains clamp load across multiple installations. The mechanism is protected by a registered-grant patent and has been validated by two FEA studies conducted by North Carolina State University's Department of Mechanical & Aerospace Engineering, with third-party performance testing performed by Wurth Industries North America (Torque-Tension Test on PermLok) and Continental Agra Equipment (Junkers Shaker Test on ReLok).

DuraForce generates revenue through direct hardware sales of its PermLok and ReLok assemblies to industrial customers. Pricing is not published; customers are directed to a toll-free number (1-800-687-8430) or an email contact form for quotes, and the company does not operate e-commerce or distributor channels. Marketing is conducted primarily through the corporate website, which lists target applications covering anchor bolts, rail and track fasteners, pump and valve assemblies, pipe flanges, suspension systems, drive shafts, transmissions, engine mounts, turbines, electric motors, construction fasteners, and electronic assemblies — spanning industrial manufacturing, construction/infrastructure, and automotive/transportation verticals. The company has no disclosed funding, no parent company, no institutional investors, and no public listing, operating as an independent LLC.

Name

Duraforce

Legal name

DuraForce Fastener Systems, LLC

Website

https://duraforcefasteners.com

Company type

Private

Operating status

Operating

Short description

DuraForce Fastener Systems is a Roanoke, Virginia-based private LLC that designs and sells patented self-locking nut systems (PermLok and ReLok) for vibration-sensitive industrial fastening in manufacturing, construction, and transportation applications.

Ownership category

akta.pro rank

Headquarters

HQ city

Roanoke

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Operations, Supply Chain, Personnel, Marketing or Sales

Revenue model

1. DuraForce Fastener Product Sales: The company generates revenue through the sale of proprietary DuraForce fastener systems, including PermLok and ReLok product lines. These are physical hardware products sold as complete fastener assemblies (nut/annulus with compression collar) for industrial applications.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels1 record

Core offering

Duraforce (DuraForce Fastener Systems, LLC) designs, manufactures, and sells self-locking nut and threaded fastener systems engineered for vibration-sensitive industrial applications. Its product portfolio centers on two offerings — PermLok, a permanent self-locking nut, and ReLok, a reusable self-locking nut — both built on patented Lateral Force Technology that uses an internal spring and compression-collar geometry to maintain clamping force under sustained vibration and thermal cycling.

Product overview

Duraforce offers a unified fastener platform comprising two distinct product lines: PermLok™ for permanent one-time installations and ReLok™ for reusable applications. Both products share the core DuraForce™ Fastener System technology—a self-locking nut with a tapered annulus that works with a compression collar to create lateral force within the joint, capturing and returning energy to prevent vibration loosening. The PermLok version deforms to lock permanently at approximately 60% bolt pre-load, while ReLok maintains smooth interior surfaces for reusability.

Differentiator

Problem solved

Functional benefit

Brands

• PermLok: One-time permanent fastener installation product that achieves approximately 60% bolt pre-load through plastic deformation between annulus threads and bolt threads, locking as it seats on the compression collar
• ReLok

Products and services

• PermLok Self-Locking Nut

Quantifiable outcome

• Approximately 60% Bolt Pre-Load achieved
• +2 more outcomes

Segments3 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• North Carolina State University (NCSU) - Department of Mechanical & Aerospace EngineeringcoreStrategic or Co-development PartnerNCSU conducted two separate studies validating the science behind the DuraForce Fastener System. FEA (Finite Element Analysis) modeling was performed to analyze deformation, force reactions, and optimal product design parameters. The research demonstrates the lateral force mechanism and internal spring effect of the technology.

Scale indicators1 record

Recent moves5 records

Expansion highlights2 records

Market position

Competitive moat2 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Duraforce