Class Code 4432
Pen Or Mechanical Pencil Mfg
Class Code 4432 covers manufacturers whose primary operations are the production, assembly, ink filling and packaging of pens and mechanical pencils. For California policies effective September 1, 2026 the WCIRB-approved pure premium rate for this class is $4.861 per $100 of payroll. Understanding the specific tasks and exposures behind 4432 helps employers accurately classify payroll and control workers' comp costs.
What Class Code 4432 Covers
This classification applies to facilities that manufacture pens and mechanical pencils and perform related operations such as plastic injection molding of barrels and caps, metal stamping or machining of clips and tips, spring and mechanism assembly, ink reservoir filling and sealing, small-part assembly, quality testing and packaging. It includes both automated production lines and manual hand-assembly stations, as well as on-site finishing processes like polishing, plating or laser marking. The code covers handling of inks, solvents, adhesives and small parts, and the operation and maintenance of presses, injection molds, CNC machines, ink-filling pumps and conveyor systems. Activities limited to distribution, retail sales, or purely administrative office work are not included under this manufacturing classification.
Who It Applies To
- Pen and mechanical pencil manufacturers (end-to-end production)
- Contract manufacturers that assemble or fill writing instruments for brands
- Assembly line operators and hand-assembly technicians
- Injection mold operators and toolroom/CNC machinists
- Ink-filling/packaging machine operators and quality control technicians
- Maintenance electricians and mechanics who service manufacturing equipment
Common Job Duties
- Operating injection molding machines to produce plastic barrels, caps and components
- Stamping, turning or machining metal clips, tips and housings
- Assembling springs, feed mechanisms and small internal components by hand or with feeders
- Filling ink reservoirs, capping/sealing cartridges and testing ink flow
- Operating and monitoring automated conveyors, feeding systems and packaging lines
- Routine maintenance, die changes, tool adjustments and machine cleaning
- Incoming materials inspection, final product inspection and functional testing
Common Injury Risks
Understanding the $4.861 Rate
The approved pure premium rate of $4.861 per $100 of payroll is the expected cost of claims for this classification before insurer expenses and adjustments. To estimate pure premium, divide total payroll by 100 and multiply by 4.861 (for example, $100,000 payroll yields $4,861 pure premium). Final premium an employer pays also reflects underwriting loads, experience modification (EMR), state assessments, policy credits or debits, audits and any deductible or retrospective rating arrangements.
Cal/OSHA Compliance Requirements
Cal/OSHA requirements commonly applicable to pen and mechanical pencil manufacturing include machine guarding and safeguarding of point-of-operation hazards, control of hazardous energy (lockout/tagout) during maintenance, Hazard Communication (GHS) for inks and solvents, respiratory protection if inhalation hazards exist, and hearing conservation where noise exposures exceed permissible limits. Employers must maintain SDS, provide employee training on chemical hazards and safe machine operation, and keep accurate injury logs and required reporting under California standards.
How Key HR Helps Employers Under Class Code 4432
A PEO like Key HR can help employers in Class 4432 by ensuring correct payroll classification, delivering California-specific safety programs tied to machine guarding and chemical handling, and managing workers' comp claims to shorten claim durations. Key HR provides coordinated return-to-work plans, routine safety audits and training (lockout/tagout, HAZCOM, ergonomics), centralized OSHA recordkeeping and access to experienced workers' comp carriers — all of which can reduce experience modifier and total cost of risk.
Get a QuoteFrequently Asked Questions
How do I know if my employees belong in Class Code 4432?
If your primary operation is manufacturing pens or mechanical pencils — including molding, metal stamping/machining of parts, ink filling, assembly and packaging — those production and maintenance employees should generally be classified in 4432. Office staff, salespeople and distribution-only workers are classified separately.
What practices reduce chemical exposure risk from inks and cleaners?
Implement engineering controls such as local exhaust ventilation at ink-filling stations, substitution with lower-VOC products where feasible, enclosed transfer systems, appropriate PPE (gloves, eye protection), regular SDS access and employee HAZCOM training. Routine air monitoring and medical surveillance may be required when exposures exceed Cal/OSHA limits.
What are the most effective ways to lower workers' comp costs in this class?
Accurate payroll classification, proactive machine guarding and lockout/tagout programs, ergonomics and job-rotation to reduce repetitive strain, robust pre-placement and return-to-work policies, prompt medical management of claims, and regular safety training all lower claim frequency and severity. Partnering with a PEO experienced in California manufacturing can also improve underwriting and reduce your EMR over time.
Quick Facts
- Class Code
- 4432
- Classification
- Pen Or Mechanical Pencil Mfg
- Pure Premium Rate
- $4.861 / $100 payroll
- Effective Date
- September 1, 2026
- Source
- WCIRB Approved Filing
Manage Workers' Comp Through a PEO
Key HR provides pay-as-you-go workers' comp for California employers — no large deposits, no audits, better rates.
Get a Quoteor call (800) 922-4133Ready to Simplify Workers' Comp for Class Code 4432?
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