3/8″ Drive 12-Point SAE 5/8″ Flank Drive® Deep Flare Nut Crowfoot Wrench

AN850810B — 3/8" Drive 12-Point SAE 5/8" Flank Drive® Deep Flare Nut Crowfoot Wrench. Turn the specified fastener or fitting where jaw shape and access matter.

Applications and industries

Automotive service, machinery assembly and industrial maintenance are potential settings for matching fasteners or fittings.

• Match the opening or adjustment range to the fastener.
• Next, compare offset, length and head profile against nearby components.

These industry examples are selection guidance, not additional manufacturer approvals.

Features of AN850810B

• Thin wall design for better access around obstacles
• Use on power steering lines, expansion valves, A/C lines, hydraulic lines and industrial equipment and fuel filter lines
• Snap-on® wrenches using the Flank Drive® system grip the fastener on the flanks/flats delivering 15–25% more turning power
• Nickel-chrome alloy finish resists rust and corrosion
• Manufactured from the highest quality domestic steel, providing optimum strength and durability
• Maximum recommended working torque–250 in-lb

Specifications and fit checks

• Size, inches: 5/8
• Dimension B, Wall Opening, inches: 1/2
• ASME®/ANSI®: B107.21
• Dimension A, O.D., inches: 15/16
• Finish: Chrome
• Maximum Recommended Working Torque, in-lb: 200

Confirm the measurement system and fitting type. A different offset or profile may change access even when the nominal size is similar.

Similar models to AN850810B

The table compares official catalogue details. These are selection options, not confirmed replacements. Check the differences against the task and existing equipment.

AN850810B selection checklist

For AN850810B, verify the required task, working range, interface dimensions and package contents against the official catalogue details. This final check helps prevent ordering a visually similar model with a different fit or capability.

Choosing AN850810B for the task

Match the opening to the fastener or fitting before considering handle length. Open-end, box-end, flare-nut and adjustable formats can offer different contact and access arrangements. Also, the surrounding pipework, panels or adjacent fasteners may limit how the wrench can be positioned. A model that reaches the fastener still needs enough room for controlled movement. Record any offset, head thickness or adjustment requirement that is essential to the job.

For specialized service, the vehicle or machine application may be more important than a familiar nominal size. Do not infer compatibility with an aircraft, hydraulic fitting or particular vehicle from a general wrench description. Similarly, longer reach does not establish a higher allowable load. Compare the exact format and documented purpose, then follow the relevant service instructions. When replacing an existing wrench, include its model number and the reason a different configuration is being considered.

Planning the workshop application

Define the intended job in practical terms before comparing options. Record the equipment or component involved, the operation to perform and the access available around it. Include the current tool or accessory if this purchase replaces an existing item. That context helps distinguish a size change from a different product function. It also makes the application and industry examples above easier to assess against the actual work.

Understanding the catalogue record

The official listing identifies this model as 3/8" Drive 12-Point SAE 5/8" Flank Drive® Deep Flare Nut Crowfoot Wrench. Its catalogue grouping is Crowfoot (3/8" Drive) / Flank Drive® Flare Nut, Deep, 12-Point, inches (3/8"). Use that description to identify the product format, then read the individual specifications for the details that matter to the job. A category describes where the product sits in the range; it is not an additional compatibility approval.

Further catalogue details

• Dimension E, Head Depth, inches: 23/32
• Style: 12-Point
• Dimension C, Ctr. to Ctr., inches: 23/32

For this record, the available specification labels include Size, inches; Dimension B, Wall Opening, inches; ASME®/ANSI®. Read each value together with its label and unit. A drive size, external dimension and working range describe different things, even if their numbers look similar. If the job requires a value that is not listed, request that detail before ordering instead of estimating it from the photograph.

The catalogue country-of-origin field is USA. This field concerns the listed product origin; it does not identify local inventory, delivery time or the warranty terms of a Vietnam quotation. Confirm those commercial details separately.

Comparing options before ordering

The comparison above names AN850812B and AN850813B. Review the displayed differences against the requirement for this job. Begin with function and compatibility, then compare access, configuration and included components. If the names differ by size, drive, colour or kit format, identify which difference matters before making a choice. Similar models are not automatic replacements, and a larger or more expensive option is not necessarily the better match.

Purchase questions and receiving checks

What should the order include?

Ask for a line-item description of the supplied configuration. For a set or kit, confirm the contents; for a component, confirm the quantity and the matching parent model where relevant. If photographs show a larger assembly or several items, do not assume all of them form part of this SKU. Keep any essential accessories and documents explicit in the quotation so that receiving checks can follow the same requirements.

Receiving, care and record keeping

On receipt, compare the item and its packaging with the ordered model, quantity and configuration. Check the supplied components and any requested documentation. Keep the product identification visible in the workshop’s inventory record. If the delivered item differs from the confirmed order, resolve that difference before assigning it to the planned job. This is especially useful when a range contains visually similar sizes or accessories for different parent tools.

For continued use, follow the manufacturer’s instructions for inspection, cleaning, storage and maintenance. Do not assume that a cleaning chemical, lubricant or maintenance method used on another tool is suitable here. Keep damaged or uncertain equipment out of the planned task until its condition is assessed. Record any replacement parts by model so future orders use the confirmed reference rather than a visual guess.

Ordering in Vietnam

Send Techmaster Vietnam the model number AN850810B and details of the task or existing equipment. Include any required sizes, connections and accessories.

Before ordering, confirm the quotation, lead time, package contents and applicable warranty terms. The official catalogue is the technical reference; it does not establish local stock or a Vietnam selling price.

For the source record, see the official Snap-on product listing. You can also browse the Vietnam product catalogue for related tools.