PennAero

What PennAero does

PennAero is a privately held aerospace manufacturing platform headquartered in El Segundo, California, that designs and produces highly engineered fasteners and precision components for commercial aerospace, defense, space, and advanced energy customers. The company operates a house-of-brands model with 13 wholly owned operating companies, organized into two segments: a Fasteners group (Monogram Aerospace Fasteners, Allfast Fastening Systems, Briles Aerospace, American Drilling Company, LubeCo, Mac Fasteners, TFI Aerospace) and an Engineered Components group (PMI Group, RSA Engineered Products, Martinic Engineering, Weldmac Manufacturing Company, TAG). Its portfolio spans proprietary blind bolt architectures (Visu-Lok, Composi-Lok, Radial-Lok, OSI-Bolt, MAF), solid and blind rivets, temporary fasteners (Wedgelock), precision CNC machining and EDM, NADCAP-accredited metal finishing and dry film coatings, and flight-critical ducting, ozone converters, and anti-vibration systems. Manufacturing operates across more than 15 facilities in the US, Canada, Germany, India, and Singapore, supporting customers including Boeing, Airbus, Lockheed Martin, Embraer, Bombardier, and the US military.

PennAero generates revenue primarily through hardware sales of mission-critical aerospace fasteners and precision-machined components, sold on a quote-based, program-specific basis under multi-year contracts. Its go-to-market combines direct enterprise field sales with technical sales engineers supporting major OEMs and tiered suppliers, complemented by an authorized distributor network (Boeing Distribution Services, Peerless Aerospace, Aero-Glen International, Proponent, Avdel India) for standard fasteners and aftermarket/AOG demand. Pricing is negotiated per program based on technical specifications, volumes, and certification requirements, with no public price list. The platform is owned by private investment firm Tinicum, L.P., with Blackstone Inc. as a minority investor following the March 2026 acquisition of TriMas Corporation's aerospace assets for approximately $1.45 billion, which materially expanded its product line and global footprint.

Name

PennAero

Legal name

PennAero

Website

https://pennaero.com

Company type

Private

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

PennAero is a privately held aerospace manufacturing platform that designs and produces highly engineered fasteners and precision components for commercial aerospace, defense, space, and advanced energy customers, operating 13 specialized brands across 15+ facilities in North America, Europe, and Asia.

Ownership category

akta.pro rank

Product category

Aerospace Fasteners and Precision Components

NAICS

Bolt, Nut, Screw, Rivet, and Washer Manufacturing (332722), Aerospace Product and Parts Manufacturing (33641)

SIC

Bolts, Nuts, Screws, Rivets & Washers (3452), Aircraft Parts & Auxiliary Equipment, Nec (3728)

akta.pro primary industry

Aerospace Fasteners & Hardware (IMABANAA)

akta.pro secondary industry

Rotorcraft Parts & Components Manufacturing (Tier Suppliers) (IMABABAM)

Keywords

• Aerospace fasteners
• Blind bolts
• Precision machining
• Aerospace components
• Rivet manufacturing

Headquarters

HQ city

Los Angeles

HQ country

United States

HQ region

North America

Offices15 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Aerospace Fasteners and Precision Components: PennAero generates revenue through the manufacture and sale of highly engineered aerospace fasteners (blind bolts, solid rivets, blind rivets, temporary fasteners, specialty bolts) and precision-machined components to commercial, defense, space, and advanced energy markets. Products are sold directly to OEMs and tiered suppliers as well as through distribution partners.

Pricing tiers

Go-to-market motion2 records

Distribution channels6 records

Marketing channels4 records

Core offering

PennAero manufactures and sells highly engineered aerospace fasteners and precision-machined components, including proprietary blind bolt systems, solid and blind rivets, temporary fasteners, complex assemblies, high-pressure ducting, and metal forming, for commercial aerospace, defense, space, and advanced energy platforms. The company operates a house of 13 specialized brands selling directly to OEMs and through authorized aerospace distributors globally.

Differentiator

Problem solved

Functional benefit

Brands

• Monogram Aerospace Fasteners: Leading designer and manufacturer of permanent threaded blind bolts, collars, and temporary fasteners for commercial, business, and military aircraft.
• Allfast Fastening Systems
• Briles Aerospace
• American Drilling Company
• LubeCo Inc.
• Mac Fasteners
• TFI Aerospace
• PMI Group
• RSA Engineered Products
• Martinic Engineering
• Weldmac Manufacturing Company
• TAG

Products and services

• Visu-Lok Threaded Blind Bolts Industry-leading threaded blind bolt system for metallic structures with one-sided installation, up to 112 KSI shear strength, featuring a drive nut concept and Double Cylindrical Drive (DCD) robotic interface. Sold to aerospace OEMs and tiered suppliers.
• Composi-Lok Blind Fasteners Blind fastener family engineered specifically for composite laminates, providing superior joint integrity and a large blind-side bearing area to prevent composite damage; Composi-Lok3 variant offers shave-free flush installation.
• Radial-Lok Blind Fasteners Unique blind fastener providing 360-degree radial expansion throughout the entire fastener grip for enhanced fatigue strength and lightning strike protection, with interference fits to .006 inches.
• OSI-Bolt and Ti-OSI Blind Bolts Blind bolt offering equivalent usage to solid shank bolts with full 1.5D bearing area, direct replacement for pin-and-collar systems, one-sided installation with flush break-off; Ti-OSI titanium variant offers weight savings.
• MAF Fastening System Three-piece pin, collar, and lock-ring fastening system providing controlled clamp-up and positive mechanical lock for soft core and honeycomb materials, suited to vibration and F.O.D. critical applications.
• Wedgelock Temporary Fasteners Line of temporary fasteners supporting a wide range of aerospace assembly applications, available in manual, plier, and power operated configurations.
• Allfast Solid and Blind Rivets Solid and blind rivets, blind bolts, temporary fasteners, and installation tools for the aerospace industry, with a catalog of nearly 40,000 unique part numbers, sold to commercial and defense OEMs.
• Briles High-Strength Aerospace Bolts Certified high-strength aerospace fasteners, including standard and special bolts, supplied to OEM and tier-one customers for commercial and military aircraft.
• American Drilling Precision Drilling and CNC Machining Services Build-to-print round bar component manufacturing and precision drilling services including CNC machining, gundrilling, Swiss-style machining, honing, and wire-hole drilling for aerospace and other high-performance industries. Operates 400+ machines in a 30,000+ sq ft Torrance, CA facility.
• LubeCo Metal Finishing and Chemical Processing Services NADCAP-accredited and ITAR-registered metal finishing and chemical processing including anodizing, conversion coatings, dry film lubricants, and specialty finishes for aerospace and defense customers; dry film lubricant heritage dating to Apollo Program lunar landings.
• Mac Fasteners AN/MS/NAS/AS Standard Screws and Bolts High-volume producer of male-threaded AN, MS, NAS, and AS standard aerospace screws and bolts for commercial and military aircraft applications.
• TFI Aerospace Standard Fasteners, T-Bolts and Self-Locking Nuts Aerospace standard fasteners, commercial and aerospace T-bolts, and self-locking nuts supporting critical applications, sold direct to OEMs, Tier 1s, and aerospace distribution.
• PMI Precision-Machined Component Parts and Assemblies Close-tolerance, precision-machined component parts and assemblies using advanced CNC turning, milling, grinding, EDM, electro-mechanical assembly, and gear shaping/hobbing for aerospace OEMs, defense customers, and semiconductor equipment manufacturers.
• RSA Aircraft Ducting, Ozone Converters and Complex Assemblies Flight-critical pneumatic and environmental control system components including metallic ducting assemblies, ozone converters, flexible joints, motion compensators, and high-temperature seal connectors for commercial and defense applications.
• Martinic Highly-Engineered Complex Aerospace Parts Highly-engineered complex parts manufactured for demanding aerospace industry applications, supplied to aerospace OEMs and tiered customers.
• Weldmac Metal Formed Components and Complex Assemblies Highly engineered metal formed components and complex assemblies for the aerospace, defense, and power generation markets, manufactured in a ~110,000 sq ft facility supporting more than 100 customers and over 1,500 active custom job orders.
• TAG Tie-Rods and Rubber-Metal Anti-Vibration Systems Highly engineered tie-rods and rubber-metal anti-vibration systems for commercial and military aerospace applications.

Quantifiable outcome

• Over 125 years of aerospace fastener manufacturing experience with Monogram pioneering blind bolt technology
• +4 more outcomes

Named customers7 records

Segments6 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

One partnership is on record.

• TriMas CorporationmajorStrategic or Co-development Partner · 4 November 2025PennAero completed acquisition of TriMas Corporation's aerospace assets in March 2026. The acquired assets included 8 TriMas Aerospace companies: Monogram Aerospace Fasteners, Allfast Fastening Systems, Mac Fasteners, TFI Aerospace, Martinic Engineering, RSA Engineered Products, Weldmac Manufacturing Company, and TAG. This major transaction created one of the aerospace industry's leading independent suppliers.

Scale indicators6 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Senior plc: Senior plc is an international aerospace and defense components manufacturer producing precision-engineered fasteners, ducting, and structural assemblies, comparable to PennAero's RSA Engineered Products and Weldmac metal forming lines.
• Howmet Aerospace: Howmet Aerospace is a multi-billion-dollar aerospace supplier whose fastening systems segment produces engine fasteners, bolts, and installation tools serving the same Boeing/Airbus commercial and defense customer base as PennAero.
• Heroux-Devtek: Heroux-Devtek designs and manufactures aerospace landing gear, actuation systems and precision components, comparable to PennAero's engineered components segment (PMI, Martinic) supplying Tier-1 commercial and defense OEMs.
• Precision Castparts Corp (PCC): PCC, owned by Berkshire Hathaway, operates the largest aerospace fastener business globally (including Cherry Aerospace) supplying high-performance fasteners and components. Comparable to PennAero across product type and OEM customer base, though at significantly greater scale.
• Triumph Group: Triumph Group is a major aerospace components manufacturer serving commercial, business, and defense markets with structural and precision components, overlapping with PennAero's RSA Engineered Products and Weldmac operations.
• TransDigm Group: TransDigm is a leading producer of proprietary aerospace components and systems including specialty fasteners and electromechanical assemblies, addressing the same mission-critical aerospace value pools as PennAero.

Others

• Arconic: Arconic is a major aerospace aluminum, titanium, and fastener blank supplier whose products feed into aerospace component manufacturing supply chains that PennAero participates in as a downstream tier-1/2 supplier.

Direct peers

• Click Bond: Click Bond manufactures specialty aerospace fasteners and bonding fasteners for aircraft structures, with a focus on one-sided installation solutions comparable to PennAero's Visu-Lok and OSI-Bolt product families.
• LISI Aerospace: LISI Aerospace is one of the world's largest dedicated manufacturers of aerospace fasteners and structural components, with a multi-brand portfolio serving Boeing, Airbus and defense primes. It is the closest pure-play comparable to PennAero's house-of-brands fastener model.
• B&B Specialties: B&B Specialties is a precision aerospace fastener manufacturer producing specialty bolts, screws, and complex machined fasteners for commercial and defense aerospace programs, directly overlapping with PennAero's Briles and Mac Fasteners brands.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/penn-aero/posts/?feedView=all

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries12 records

Funding overview

Funding rounds

Investors

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

M&A1 record

Investments

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

Frequently asked questions about PennAero