Carbon Steel Locking Bolt for Red Dot Picatinny Rail Mount, M4 Thread, 30.5mm Length

Our carbon steel locking bolt is specifically engineered for securing optic red dot mounts to standard Picatinny rails (MIL-STD-1913), playing a critical role in maintaining the stability and precision of tactical optics. Crafted from high-quality carbon steel, the bolt undergoes precision cold heading and thread rolling processes to ensure structural integrity and consistent performance. With a total length of 30.5mm, 6.0mm head diameter, 3.5mm head height, and 11mm M4 thread length, it perfectly fits the mounting holes of optic red dot bases, delivering firm locking force to prevent mount loosening during use.

• Sport equipment: Securing red dot sights on rifles, pistols, and airsoft guns with Picatinny rails.
• Hunting equipment: Reliable locking for red dot mounts on hunting rifles, ensuring precision aiming in outdoor environments.
• Optic mount manufacturing: As a standard fastener for OEM optic red dot mount production, compatible with most mount designs.
• Tactical accessories: Suitable for custom tactical setups that require secure, corrosion-resistant locking bolts for optic mounts.

As a professional custom bolt manufacturer, we offer comprehensive OEM customization services to meet your specific requirements, including but not limited to:

• Dimensional customization: Adjust total length, head diameter, head height, thread length, and thread specification (M3-M10) according to your design drawings.
• Material customization: Optional materials include low carbon steel (Q235), medium carbon steel (S45C), high carbon steel, and alloy steel, based on your strength and performance needs.
• Surface treatment customization: Alternative finishes such as zinc plating, nickel plating, phosphate coating, and black oxide (matte/shiny) to meet corrosion resistance and aesthetic requirements.
• Precision customization: Adjust precision grade (Grade A/B/C) and tolerance range to match your strict assembly requirements.
• Packaging customization: Customized packaging with your brand logo, product specifications, and barcodes for retail and wholesale purposes.

1. Inquiry & Requirement Confirmation: You provide design drawings, dimensional parameters, material requirements, surface treatment, and order quantity; our team responds within 24 hours to confirm details and provide a preliminary quote.
2. Sample Development: We produce 1-5 samples according to your requirements, complete surface treatment, and send them to you for quality and fit testing (sample delivery time: 3-7 working days).
3. Sample Approval: You test the samples and provide feedback; we adjust and optimize until the sample meets your requirements.
4. Formal Order & Deposit: After sample approval, you place a formal order and pay the deposit (30% of the total amount); we start mass production.
5. Production & Quality Inspection: We complete mass production within the agreed delivery time (7-20 working days) and conduct 100% quality inspection.
6. After-Sales Service: We provide 6-month after-sales support, if there are quality issues caused by our production, we offer free replacement or refund.

• Solve Loosening Issues: Precision thread rolling process ensures tight thread fit, with a tensile strength of ≥1200MPa, preventing mount loosening caused by recoil.
• Solve Corrosion Problems: Hot black oxide finish with oil seal provides excellent corrosion resistance, avoiding rust and damage in humid, outdoor, or harsh environments.
• Solve Fitment Troubles: Strict dimensional tolerance (±0.02-0.05mm) and compliance with ISO standards ensure perfect fit with Picatinny rails and optic red dot mounts, eliminating assembly gaps.
• Solve Precision Concerns: High-precision cold heading and turning processes ensure consistent dimensional accuracy, avoiding uneven force and optic misalignment caused by bolt inaccuracy.
• Solve Customization Difficulties: Professional OEM customization supports personalized parameters, materials, and finishes, meeting unique design needs that standard bolts cannot satisfy.

We adhere to ISO 9001 quality management systems, implementing strict quality control throughout the production process to ensure product reliability:

• Raw Material Inspection: All carbon steel materials are tested for chemical composition and mechanical properties (tensile strength, hardness) before production to ensure they meet standard requirements.
• In-Process Inspection: Inspect dimensional accuracy (total length, head size, thread) during cold heading, thread rolling, and turning processes using precision calipers and thread gauges, with a sampling rate of 100%.
• Surface Treatment Inspection: Check the uniformity and adhesion of the black oxide finish, conduct salt spray tests to verify corrosion resistance, and ensure no peeling or discoloration.
• Final Inspection: 100% inspection of finished products, including dimensional accuracy, thread fit, surface quality, and hardness, eliminating defective products.
• Quality Documentation: Provide detailed quality inspection reports for each batch of products, including material test reports, dimensional inspection records, and corrosion test results, ensuring traceability.