Machine Screw Kits

Machine screw kits keep a selection of threaded fasteners together for maintenance, repair, assembly, replacement, and fabrication work. These assortments are used to secure compatible components on machines, tools, appliances, electronic devices, and other threaded fastening applications, with options spanning common inch and metric sizes, head profiles, drive styles, and materials.

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Helpful Buying Guide

Choose a Machine Screw Kit for the Fasteners Your Work Requires

Machine screw kits make it easier to keep commonly used fasteners available for routine repairs and assembly tasks. Compare the thread system, size range, head and drive style, available lengths, material, and whether matching nuts or washers are included before selecting an assortment.

Visual Guide

Popular examples in this category

Assorted #8-32 Round Head Phillips/Slotted Machine Screw KitAssorted #8-32 Round Head Phillips/Slotted Machine Screw KitWBB3147930330-Piece Slotted Round Head Machine Screw Assortment, #6 to 1/4 in., Zinc-Plated Steel330-Piece Slotted Round Head Machine Screw Assortment, #6 to 1/4 in., Zinc-Plated SteelWBB2170177330-Piece Phillips Pan Head Machine Screw Assortment330-Piece Phillips Pan Head Machine Screw AssortmentWBB2170186Phillips Flat Head Machine Screw Assortment, #6 to 1/4 in.Phillips Flat Head Machine Screw Assortment, #6 to 1/4 in.WBB2170208
Use Cases

Keep common repair fasteners close at hand

Machine screw assortments support maintenance, repair, replacement, and assembly work involving machines, tools, appliances, and electronic devices. They can help teams select a compatible screw length when fastening components.

How to Choose

Start with thread size and system

Choose inch-thread assortments for listed sizes from #6 through 1/4 in., or select metric assortments covering M3 through M6. For focused needs, kits are also available in #6-32, #8-32, and #10-32.

Applications

Match the head and drive to the job

Pan, flat, and round head options serve different compatible applications. Phillips, slotted, Phillips/slotted, and square/slotted drives let buyers match the tools and screw-drive engagement needed for the task.

Additional Info

Consider included hardware and construction

Some assortments include matching hex nuts, while one stainless steel assortment includes hex nuts, SAE flat washers, and split lock washers. Listed constructions include carbon steel, zinc-plated steel, and 304 stainless steel.

#6 to 1/4 in.Inch size coverage

Broad inch assortments cover common thread sizes from #6 through 1/4 in.

M3 to M6Metric size coverage

Metric assortments provide common M3 through M6 threaded fasteners.

3/8 to 2 in.Listed length range

Listed assortment lengths range from 3/8 in. to 2 in., depending on the kit.

270 or 330 piecesSelected assortment counts

Representative mixed assortments include 270-piece and 330-piece options.

Comparison Guide

Compare Machine Screw Kit Types

Use this overview to narrow the assortment style that best matches your required thread system, head profile, drive, and accompanying hardware.

Kit typeTypical represented optionsWhat to compare
Inch screw assortments#6 through 1/4 in.; #6-32, #8-32, and #10-32 focused kitsRequired thread size, listed lengths, and whether the job needs a broad or focused selection
Metric screw assortmentsM3 through M6; Phillips pan head or Phillips flat head; matching hex nuts in listed assortmentsMetric thread requirement, pan or flat head profile, and need for corresponding nuts
Stainless steel assortments304 stainless steel Phillips pan head screws, or hex nuts with SAE flat washers and split lock washersWhether stainless steel construction is needed and which listed hardware components are required
Planning Guide

Plan the right fit before choosing

Thread Size and Length Planning

Confirm the sizes required for compatible components

The available assortments cover several common fastening ranges. Inch options include #6, #8, #10, #12, and 1/4 in. sizes, while metric options cover M3 through M6. Some focused kits are built around a single thread size, such as #6-32, #8-32, or #10-32.

  • Select inch or metric hardware based on the threads required by the application.
  • Compare individual thread sizes within broad assortments, including #6-32 through 1/4-20 where listed.
  • Check available lengths: selected assortments range from 3/8 in. to 1 in., while certain #6-32, #8-32, and #10-32 kits span 1/2 in. to 2 in.
Head, Drive, and Material Selection

Choose a profile and drive that fit the fastening task

Flat head screws are intended to sit flush in compatible countersunk applications. Pan heads provide a rounded pan-head profile, and round-head assortments support applications requiring that head style. Drive options vary across Phillips, slotted, Phillips/slotted, and square/slotted configurations.

  • Choose Phillips-drive options for compatible Phillips tools.
  • Consider Phillips/slotted or square/slotted kits where either listed drive engagement option is useful.
  • Compare carbon steel, zinc-plated steel, and 304 stainless steel constructions based on the product requirements.
Included Hardware and Assortment Format

Decide whether screws alone or coordinated hardware is needed

Many selections focus on machine screws across multiple sizes and lengths. Other assortments provide matching hex nuts, which can help pair screw thread sizes with corresponding nuts. A 304 stainless steel hex assortment also keeps hex nuts, SAE flat washers, and split lock washers together.

  • Select an assortment with matching hex nuts when corresponding nuts are needed for the work.
  • Choose a nuts-and-washers assortment when those listed components are also required.
  • For larger mixed selections, 270-piece and 330-piece assortments are represented.
FAQ

Common questions before buying

What thread sizes are available in these machine screw kits?

Representative inch assortments span #6 through 1/4 in., with focused #6-32, #8-32, and #10-32 kits. Metric assortments cover M3 through M6.

Which head styles are represented?

The category includes round head, pan head, and flat head machine screw assortments.

Are matching nuts available?

Yes. The listed Phillips flat head and metric pan or flat head assortments include matching hex nuts. One 304 stainless steel assortment also includes hex nuts, SAE flat washers, and split lock washers.

What drive styles can I compare?

Listed choices include Phillips, slotted, Phillips/slotted, and square/slotted drives.

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