The Honeywell North® Pre-Filter Retainers (Model N750036) are essential snap-on accessory covers engineered to secure particulate pre-filters onto Honeywell North® N-Series chemical and gas/vapor cartridges. Constructed from high-impact, chemically resistant molded polymer, these retainers allow industrial and aerospace MRO operators to add N95, R95, or P100 pre-filters directly over gas/vapor cartridges (such as organic vapor or acid gas elements). By stacking a particulate pre-filter on top of a chemical cartridge, North pre-filter retainers establish a dual-protection combination barrier that traps airborne overspray, dust, and mist before they clog the main chemical absorbent layer, significantly extending cartridge service life.

Technical Specifications & Cross-References

• Manufacturer: Honeywell Safety Products / North®
• Product Name: North® N-Series Pre-Filter Retainer Covers
• Part Number / SKU: N750036 (Package of 2 retainers / 1 pair)
• Material Construction: High-Impact Molded Polypropylene / Polymer
• Color: Translucent / Clear Polypropylene
• Cartridge Compatibility: Designed specifically for all Honeywell North® N-Series Gas and Vapor Cartridges (e.g., N75001L, N75002L, N75003L)
• Pre-Filter Compatibility: Holds Honeywell North® N-Series Prefilter Discs (e.g., N750029 N95 pre-filters, N750030 R95 pre-filters)
• Attachment Mechanism: Tool-less snap-fit ring enclosure over cartridge rims

Approved Specifications & Regulatory Conformance:

Honeywell North pre-filter retainers comply with strict NIOSH respiratory accessory protocols:

• NIOSH System Certification: Maintains full NIOSH 42 CFR 84 system approval when used in combination with certified Honeywell North cartridges, pre-filters, and half or full facepieces (5500, 7700, 5400, 7600, RU6500 series).
• OSHA Respiratory Standards: Meets OSHA 1910.134 guidelines for particulate pre-filtration accessory components.

Key Features & Performance Benefits

• Extends Chemical Cartridge Lifespan: Shields primary carbon absorption beds from liquid overspray and solid particulates, preventing premature clogging and lowering operating costs.
• Tool-Less Snap-On Assembly: Snaps securely over N-Series chemical cartridges without tools, ensuring rapid field replacement of saturated pre-filters.
• Durable & Chemically Resistant Polymer: Built to withstand harsh shop environments, solvent wipes, spray paint overspray, and high humidity without warping or cracking.
• Secure Seal Geometry: Features a continuous perimeter lip that clamps the pre-filter flat against the cartridge intake, preventing particulate bypass around the edges.

Typical Applications

• Aerospace & Automotive Spray Painting: Used to secure N95/R95 pre-filters over organic vapor cartridges to capture liquid paint mist, primers, and clearcoats.
• Chemical Processing & Solvent Washing: Holds pre-filters to stop airborne dust and aerosol droplets from entering chemical vapor cartridges during tank washing and degreasing.
• Composite Fabrication & Sanding: Enables combination protection against hazardous resin vapors and airborne fiberglass or carbon dust during MRO composite repair operations.

• All in-stock orders are processed within 1–2 business days (excluding weekends and holidays) after receiving your order confirmation email.
• Orders with a lead time will ship according to the estimated shipping time shown on the product page.
• If we experience a high volume of orders or if an item is backordered, processing times may be slightly delayed. We will notify you promptly via email.

• Returns and damage claims must be made within a maximum of 3 business days after receiving the product, with prior authorization from Aircraft Shop Supply (Return Material Authorization - RMA). Returns without prior notice or written authorization will not be accepted. We strongly recommend inspecting the product upon delivery; many products require special storage conditions for which we are not responsible once they arrive to the client's facility. Please review the product's SDS for proper storage and handling.
• For products with 3 to 6 months of remaining shelf life, claims must be made within the next 2 business days after receipt.
• Returns are not accepted for products with less than 3 months of remaining shelf life.
• Returns are not accepted for products purchased during a low Shelf Life promotion, items sold with discounts, or special orders that must be placed directly with the factory.
• The customer is responsible for the return shipping cost, except in cases where the return is due to an error on the part of Aircraft Shop Supply.
• Refunds will only be issued after the product has been inspected and no damage is found.
• A 25% Restocking Fee will be charged for returns of products in good condition that are either no longer needed or were ordered incorrectly.
• A 35% Restocking Fee will be charged for returns of products with one year or less of remaining shelf life.
• No Restocking Fee will be charged if Aircraft Shop Supply is responsible for incorrectly shipping a product, or if the order is damaged upon leaving the warehouse.
• Hazardous Materials & Dangerous Goods: These items are sold as final and are not eligible for return approval.

At Aircraft Shop Supply, we are committed to shipping the highest quality and freshest product possible. To ensure efficient stock rotation and meet aviation industry standards, our inventory management is governed by the following policy:

1. Scope of Application
All Sales Channels: This policy applies to all orders processed by Aircraft Shop Supply, including but not limited to: website purchases, direct email orders, formal Purchase Orders (POs), phone orders, and contract agreements.

2. Inventory Management (FIFO)
All products with an expiration date are managed and shipped on a strict "First In – First Out" (FIFO) basis.

3. Minimum Shipping Margin
Standard Guarantee: We will not ship any products with fewer than 30 days of use remaining (days before expiration), unless previously coordinated and agreed upon with the customer.

No Automatic Guarantees: Outside of this 30-day minimum margin, Aircraft Shop Supply does not make any automatic guarantee as to the specific length of time remaining on any shelf-life item for standard orders.

4. Special Customer Requirements
We understand that certain projects, maintenance schedules, or regulatory standards require strict specifications. If your order has specific shelf-life requirements, please proceed as follows:

How to Request: If you require a specific Date of Manufacture (DOM), Date of Expiration (DOE), or a specific minimum shelf-life percentage (%), you must clearly state this requirement:

In the Comments/Notes section when placing an online order.

Explicitly written on your Purchase Order (PO) or quote request email for offline orders.

Validation Process: Once your requirement is received:

We will ship your order if the available stock matches your specifications.

If we do not have the exact batch, we will contact you prior to shipping with the shelf-life percentage (%) or dates we have available for your acceptance.

5. Limitation of Liability and Validity of Information
To ensure transparency and manage expectations, the following terms and conditions apply:

Time-Limited Validity: Any information provided by our team regarding the remaining shelf-life percentage (%) is valid only at the exact time the inquiry is made. Due to high inventory turnover, availability is subject to change without prior notice.

Informational Purposes Only: Shelf-life data provided by Aircraft Shop Supply is strictly for informational purposes and reflects the availability at the moment of inquiry. It does not constitute a batch reservation or a product warranty.

Supply Chain Liability Exclusion: Aircraft Shop Supply is not responsible for the time elapsed or any product expiration that occurs after the order has been prepared and packed. This includes, but is not limited to: the time between order placement, carrier transit times, intermediary storage, customs delays, and final delivery to the end user. It is the customer's responsibility to account for these logistical lead times within their planning.