Welding
Welding
We create custom designs to meet your needs, delivering high-quality results for every project.
Contract Manufacturing & Supply Chain Solutions for Metal Fabrication
Delivering complex, high-quality fabrication — and the supply chain reliability OEMs depend on
- 3.2 weeksAverage Lead Time
- 10+Degreed Engineers On Staff
- 40+Years In Business
- 98.9%Quality Rating
- $750 - $7MOrder Range
Contract Manufacturing Services Built for Complex Projects
As a contract manufacturing company serving industrial and OEM markets, we support projects that require precision, repeatability, and scalable production capabilities.
We manufacture tight-tolerance metal components, welded assemblies, and custom enclosures for OEM applications requiring repeatable production quality and schedule-sensitive delivery.
Explore Our Services - Welding, Machining, Sheet Metal in Anaheim, Orange County, Los Angeles, Irvine, Santa Ana, Fullerton, Brea, Yorba Linda, Newport Beach, Long Beach, San Diego, Riverside, San Bernardino, and Southern California
We create custom designs to meet your needs, delivering high-quality results for every project. 
We offer unparalleled knowledge in complex precision machining. Sheet MetalSheet MetalWe offer unparalleled knowledge in complex precision machining.
We offer unparalleled knowledge in complex precision machining. MachiningMachiningWe offer unparalleled knowledge in complex precision machining.
We offer unparalleled knowledge in complex precision machining. Metal FabricationMetal FabricationWe offer unparalleled knowledge in complex precision machining.
We create custom designs to meet your needs, delivering high-quality results for every project. Finishing/AssemblingFinishing/AssemblingWe create custom designs to meet your needs, delivering high-quality results for every project.
We provide durable, high-performance finishes that protect and enhance your metal components. Powder CoatingPowder CoatingWe provide durable, high-performance finishes that protect and enhance your metal components.
Our processes support both prototype and production manufacturing with documented quality controls, repeatable machining accuracy, and production scheduling aligned with OEM delivery requirements.
Reducing Supply Chain Risk - Serving Anaheim, Orange County, Los Angeles, and Southern California
- 01Reshoring
Bring production closer with efficient, cost-effective reshoring support.
- 02Large to Small Projects
From small runs to large builds, our capacity lowers risk and keeps projects on track.
- 03Overflow work
We handle extra workload seamlessly to maintain your deadlines and quality.
- 04Succession planning for supply chain
Future-proof your operations with reliable backup strategies and continuity planning.
Helping With Complex Work - Serving Anaheim, Orange County, Los Angeles, and Southern California
- 01Degreed engineers
Expert engineers delivering reliable, innovative solutions with collaborative design support.
- 02Many capabilities under one roof
One team, many capabilities — welding, sheet metal, powder coating and assembling.
- 03
AS9100, ISO9100, NADCAP, ITAR and other compliance standards
- 04From Prototyping to production runs
Precision parts delivered quickly, from one-off prototypes to full runs
A Reliable Contract Manufacturing Partner for OEMs
OEMs and industrial buyers need more than basic fabrication support. They need a contract manufacturing partner that understands engineering requirements, procurement challenges, quality expectations, and production scalability.
At PEN Manufacturing, we provide contract manufacturing services for OEMs and industrial companies that require precision metal fabrication, machining, and dependable production support for critical supply chains.
Our team works with customers that value:
- Consistent lead times
- Reliable production capacity
- Tight-tolerance manufacturing
- Clear communication during RFQs and production
- Long-term manufacturing partnerships
- U.S.-based supply chain reliability
Rather than offering generic "one-size-fits-all" manufacturing, we focus on practical, scalable solutions tailored to each project's technical and operational requirements.
Contract Manufacturing Expertise for OEM Supply Chains
PEN Manufacturing provides trusted contract manufacturing services for OEMs requiring precision metal fabrication, CNC machining, and custom enclosure manufacturing. We support complex, tight-tolerance projects with scalable production, consistent lead times, and dependable U.S.-based manufacturing for critical supply chains.
Supporting Critical Supply Chains with Reliable Manufacturing
For OEM procurement teams, supplier reliability directly impacts production schedules, inventory planning, and operational risk.
Many buyers today evaluate manufacturers using supplier performance indicators such as:
- On-time delivery performance
- Production consistency
- Scalability
- Quality management processes
- Responsiveness during RFQs
- Long-term supply chain stability
- Supplier risk reduction
PEN Manufacturing supports OEMs with production planning, quality controls, and manufacturing capacity designed to minimize supplier disruption risk and maintain production continuity.
Our focus on communication, lead time management, and production reliability helps customers strengthen their overall supplier risk profile while improving operational efficiency.
Custom Metal Enclosure Manufacturer for Industrial Applications
PEN Manufacturing is also a trusted custom enclosure manufacturer supporting industrial, electrical, infrastructure, and OEM applications.
We manufacture:
- Industrial equipment enclosures
- Electrical enclosures
- Control cabinets
- Custom metal housings
- Outdoor-rated enclosures
- Stainless steel enclosures
- Data and infrastructure enclosures
Our team manufactures custom enclosures designed around environmental exposure, equipment access requirements, thermal considerations, and installation constraints specific to industrial and infrastructure applications.
Our team works closely with OEMs and engineers to ensure each enclosure aligns with operational, environmental, and installation requirements.
CNC Machining Services for Tight-Tolerance Components
Complex OEM projects often require machining partners capable of maintaining dimensional accuracy and repeatable production quality.
Our machining services include:
- CNC milling
- CNC turning
- Prototype machining
- Production machining
- Precision component manufacturing
We regularly support projects where accuracy, consistency, and manufacturability are critical to overall product performance.
Designed Around OEM Procurement & Engineering Needs
Manufacturing projects often involve coordination between procurement teams, engineers, operations managers, and production planners.
Our approach focuses on supporting both technical and business requirements throughout the manufacturing process.
Common Challenges
We Help Solve
- Delayed production schedules
- Long supplier lead times
- Inconsistent manufacturing quality
- Capacity limitations
- Complex RFQ requirements
- Tight-tolerance fabrication needs
- Communication gaps during production
- Scaling from prototype to production
By understanding real-world OEM procurement processes, we help customers improve manufacturing efficiency while reducing unnecessary production risks.
U.S.-Based Manufacturing for Supply Chain Stability
Many OEMs are reevaluating offshore sourcing due to:
- Shipping disruptions
- Extended lead times
- Limited production visibility
- Quality inconsistencies
- Supply chain uncertainty
Domestic manufacturing provides greater production oversight, improved communication, and faster response times when project requirements change.
PEN Manufacturing supports companies looking for production-focused U.S.-based contract manufacturing services that can adapt to changing production demands while maintaining consistent quality and delivery expectations.
Manufacturing Expertise Backed by Real Production Experience
Our manufacturing team supports OEM programs requiring coordinated fabrication, machining, assembly, and production planning for tight-tolerance and schedule-sensitive applications.
We focus on:
- Practical manufacturing solutions
- Production scalability
- Precision workmanship
- Consistent lead times
- Quality-focused processes
- Long-term customer partnerships
Rather than relying on broad marketing claims, we prioritize clear communication, operational reliability, and measurable manufacturing performance.
Industries We Support - Aerospace, Medical Devices, Automotive, Wastewater Treatment, Energy, Industrial Manufacturing in Anaheim, Orange County, Los Angeles, and Southern California
We provide manufacturing support for a range of industries, including:
- Aerospace and Defense
- Air Pollution Control
- Electrical & Electronics
- Entertainment
- Hazardous Waste Equipment
- Industrial
- Lighting
- Material Handling
- Medical & Emergency Services
- Oceanographic
- Printing
- Recreational
- Refinery & Oil Well Equipment
- Robotics
- Scientific Research
- Sewage Treatment and Disposal
- Specialty Plastic
- Transportation
- Wastewater Treatment & Disposal
Many of these industries require dependable manufacturing partners capable of supporting strict quality standards, repeatable production, and long-term supply chain continuity.
From RFQ to Production Support
Our process is structured to help OEMs move efficiently from quoting to production.
Our Manufacturing Process
- 01RFQ & Project Review
- 02Engineering evaluation
- 03Material and production planning
- 04Prototype or production setup
- 05Fabrication and machining
- 06Inspection and quality checks
- 07Assembly and finishing
- 08Delivery coordination
This process helps improve visibility, streamline communication, and support consistent project execution.
Why OEMs Choose PEN Manufacturing
OEM buyers and engineers choose PEN Manufacturing because we provide:
- Dependable contract manufacturing support
- Tight-tolerance fabrication and machining
- Responsive communication during RFQs
- Scalable production capabilities
- Consistent lead time management
- U.S.-based manufacturing support
- Experience with complex industrial projects
- Long-term manufacturing partnership approach
We understand that manufacturing reliability impacts far more than a single project — it affects broader operational performance across the supply chain.
Ready to Discuss Your Manufacturing Requirements?
If your team is looking for a reliable contract manufacturing company capable of supporting complex OEM projects and critical supply chains, PEN Manufacturing is ready to help.
Contact our team to discuss RFQs, production requirements, fabrication capabilities, or long-term manufacturing support.
Get a QuoteFrequently Asked Questions
Contract manufacturing services involve outsourcing production, fabrication, machining, or assembly work to a manufacturing company that produces components or products for another business.
We support industrial and OEM projects involving precision fabrication, machining, custom enclosures, assemblies, and scalable production manufacturing.
Yes. Our team regularly supports complex projects that require precision fabrication and machining with consistent production quality.
Custom metal enclosures are commonly used in industrial equipment, electrical systems, infrastructure, utilities, automation, and data applications.
OEMs often choose U.S.-based manufacturing to improve production visibility, reduce overseas supply chain disruptions, shorten lead times, and maintain closer coordination during engineering and production changes.
