3/8″ Drive Metric #10, 10 mm Hex, Deep Spline Socket

FELM10B — 3/8" Drive Metric #10, 10 mm Hex, Deep Spline Socket. Service fasteners with a matching bit profile and size.

Applications and industries

Automotive repair, machinery assembly and plant maintenance are potential settings where the specified fastener profile occurs.

• Select the exact hex or TORX profile before turning the fastener.
• Next, match the drive or shank to the holder. Check reach and nearby obstructions.

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

Features of FELM10B

• 3/8" drive

Specifications and fit checks

• Drive Size, inches: 3/8
• Dimension C, Bolt Clearance Depth, mm: 40.4
• Hex Size, mm: 10
• Dimension B, Drive End Dia., mm: 16.8
• Dimension E, Opening Depth, mm: 10.0
• Dimension D, Length, mm: 54.0

SAE and metric sizes are not substitutes. Also, do not use a hand-tool bit on an impact tool unless the manufacturer explicitly permits it.

Similar-model selection for FELM10B

A sufficiently close alternative has not been verified for this SKU. Therefore, compare the exact function, dimensions and mating equipment before choosing another model. Ask Techmaster Vietnam for a model-specific comparison.

FELM10B selection checklist

For FELM10B, 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 FELM10B for the task

Begin with the recess in the fastener, rather than the size of the driving tool. A hex bit, a ball-end hex bit and a TORX bit engage different shapes. Even within one family, the exact size matters. Next, consider the complete arrangement from fastener to bit, holder and drive tool. A long bit can reach past an obstruction, but the surrounding space must also accommodate the socket body and the movement of the handle.

For a workshop assortment, list the fastener sizes used most often and compare that list with the actual set contents. Do not judge coverage from piece count alone. If the task needs a replacement insert, distinguish the loose bit from a complete socket driver. Similarly, check whether the listed tool is intended for manual or impact service. Drive size, finish and appearance do not establish impact suitability. Use the manufacturer’s stated application to make that decision.

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 Metric #10, 10 mm Hex, Deep Spline Socket. Its catalogue grouping is Spline Sockets / Deep, Metric, Chrome (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 A, Socket End Dia., mm: 14.5
• Finish: Chrome
• Size, Spline (SAE): #10 (5/16)

For this record, the available specification labels include Drive Size, inches; Dimension C, Bolt Clearance Depth, mm; Hex Size, mm. 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

No sufficiently close alternative is confirmed in the comparison section. That is an unresolved selection question, not proof that every other model is unsuitable. For a useful comparison, provide the required function, dimensions and parent equipment. A supplier can then check a specific candidate against those requirements. Do not substitute a related accessory, a kit component or a product with a similar name without resolving the relevant fit details.

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 FELM10B 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.