Custom Stainless Steel Slotted Knurled-Head Thumb Screw

Custom M5 x 14 Slotted Knurled-Head Thumb Screw

This custom M5 x 14 slotted knurled-head thumb screw is manufactured from 304 stainless steel according to the Hongyuan engineering drawing dated May 25, 2026. The drawing defines an M5-0.8 partial thread, a formed point, a Ø4.8-5.0 mm unthreaded shank and a cylindrical knurled head with a straight slot. The confirmed overall length is 13.2-14.0 mm. The knurled head supports finger operation, while the slot allows a correctly sized flat-blade screwdriver to be used when additional control is required.

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Head and Drive Detail

Thread / Body Detail

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Product Specifications

Applications

Suitable for assemblies requiring repeated access, adjustment or removal, including equipment covers, electrical enclosures, instruments, control devices, fixtures, furniture hardware, lighting assemblies, removable guards and access panels. The buyer should validate thread engagement, tightening torque, load and corrosion performance for the actual assembly.

Drawing-Confirmed Features

• 304 stainless steel construction
• M5-0.8 partial machine thread with formed point
• Ø4.8-5.0 mm shank and 8.0-8.5 mm under-head unthreaded length
• Head diameter 9.8-10.2 mm and head height 6.6-7.0 mm
• Slot width 1.2-1.4 mm and slot depth 1.4-1.7 mm
• Confirmed overall length 13.2-14.0 mm

Quality Inspection Process

Inspection is built around the drawing characteristics that affect assembly, not a generic cosmetic checklist. Typical checkpoints are overall length, thread gauge result, head and drive geometry, and surface condition. Certificates or special reports are supplied when they are included in the quotation.

Optical Sorting Inspection

For higher-volume orders, Hongyuan can evaluate optical sorting for measurable or visible characteristics such as overall profile, head presence, length, head diameter, slot condition and surface defects. Optical sorting complements the approved drawing and agreed functional tests; it does not replace them.

Approved Engineering Drawing

The engineering drawing below is the dimensional authority for this custom part.

Customization & Order Information

Frequently Asked Questions

How should the material grade be specified for OEM machinery and equipment assembly?

State the required grade or alloy, mechanical condition, corrosion exposure and certificate requirement. The current material scope is stainless steel; grade such as 304 or 316 must be selected against the service environment.

Which interface dimensions should be controlled on this thumb screw?

Confirm the knurled manual-grip head, straight slot and threaded body or point, mating-part dimensions, assembly clearance and any functional gauge or installation test. These points should be identified on the drawing.

Can Hongyuan manufacture from a physical sample?

Yes. A sample supports identification and reverse review, but a drawing or signed dimensional report should define the final acceptance criteria.

How are MOQ and lead time established?

They are quoted after material availability, forming or machining route, tooling, inspection level, finish, packaging and order quantity have been reviewed.

Which application details should accompany the RFQ?

Describe mating-part material, joint load and service environment and installation tool and access. These details help determine whether the proposed geometry and material suit OEM machinery and equipment assembly.

Request a Quote

Send your required quantity, inspection plan, packaging and assembly-specific acceptance criteria. Hongyuan will review the request against the approved drawing and confirm manufacturability, sample lead time and production lead time.