Overview

This 400-piece SAE & metric lock nut kit covers 14 sizes: 7 inch (#6-32 to 1/2"-13) + 7 metric (M3-M12). From electronics to heavy machinery, one sealed box covers both thread standards — no separate SAE and metric kits needed. Machined from 304 (A2-70) stainless steel (18% Cr, 8% Ni) under ISO45001-certified quality. Unlike zinc-plated hardware, these nuts resist rust and corrosion in humid and outdoor environments, keeping threads clean and connections reusable for years. Heat-fused nylon insert deforms elastically and grips bolt threads with constant friction, preventing loosening under vibration, shock and torque — no thread-locking adhesive needed. The locking collar remains reusable across multiple installations. SAE: #6-32(35) | #8-32(25) | #10-24(40) | 1/4"-20(26) | 5/16"-18(16) | 3/8"-16(4) | 1/2"-13(2). Metric: M3-0.5(82) | M4-0.7(40) | M5-0.8(60) | M6-1.0(46) | M8-1.25(18) | M10-1.5(4) | M12-1.75(2) = 400 pcs. Standard UNC & metric coarse threads. All 400 nuts are pre-sorted in a sealed organizer with quantity labels printed inside each compartment — instantly identify sizes and prevent loss or mix-ups. The compact case (6.9 x 3.5 x 1.25 in) fits toolboxes, drawers and vehicle storage. Ideal for furniture assembly, automotive repair, machinery, construction, bicycles, appliances and DIY. Both inch and metric threads cover domestic and imported equipment — one-box solution for workshops and garages. For best results, tighten with a torque wrench or socket wrench. Avoid adjustable wrenches and impact wrenches, which can over-torque and deform the nylon collar, reducing locking performance. Always match the correct thread pitch before assembly. Manufactured under strict control of thread accuracy and surface finish. Backed by responsive support — if anything falls short, contact us and we will make it right. Order risk-free today.

Features

• 400 Pcs / 15 Sizes: 400-piece SAE & metric lock nut kit: 7 inch sizes (#6-32 to 1/2"-13) + 7 metric sizes (M3-M12). More pieces than similar-priced kits — one box replaces separate SAE and metric assortments, covering electronics to heavy machinery.
• 304 (A2-70) Stainless Steel: Machined from 304 (A2-70) stainless steel (18% Cr + 8% Ni) with ISO45001-certified quality. Corrosion-resistant and rustproof in humid or outdoor conditions, far more durable than zinc-plated nuts. Clear threads, smooth finish, consistent sizing.
• Nylon Insert Anti-Loosening: Heat-fused nylon collar grips bolt threads with elastic friction, holding fast under vibration, shock and torque — no adhesive needed. Reusable across multiple installations with dependable locking force for engines, motors, furniture and vehicles.
• Sealed Box with Quantity Labels: Pre-sorted in a sealed organizer with quantity labels printed inside each compartment. Instantly identify sizes, prevent loss or mix-ups, and keep your workspace tidy. Compact 6.9 x 3.5 x 1.25 in case fits toolbox, drawer or vehicle storage.

Specifications

• Package dimensions: 1.26 x 3.54 x 6.89 in
• Weight: 1.81 lb

Condition

New: This item is brand new, unused, unopened, and in its original packaging. It has never been worn or used and is in perfect condition, just as received from the manufacturer.