Flat Head Square Neck Adjusting Bolts with Flat Head Fasteners for Furniture and Machinery

Product Overview

This product is a flat-head square-neck adjusting bolt made of high-quality carbon steel with a plain machined finish. It consists of a wide flat disc head, a square neck below the head and a fully threaded shank with a hex socket in the end face. The flat disc head provides a large contact area and even pressure distribution for support and leveling, the square neck allows the bolt to be gripped and rotated with a wrench, and the hex socket in the shank end allows adjustment from the top, which is especially convenient in confined spaces. With a wide adjustment range and reliable load capacity, it is widely used for equipment support and leveling, machine and cabinet base adjustment, and shelving and furniture leveling.

 

Product Features

Flat disc head design: The large flat disc head provides a large contact area and even load distribution, ensuring stable support that resists sinking or wobbling after leveling.

Square neck for wrench use: The square neck below the head can be gripped with a wrench to rotate and adjust the height and to apply higher torque for locking, making operation easier and more reliable.

Fully threaded shank: The fully threaded shank provides a wide height adjustment range, allowing flexible support height adjustment as required.

Hex socket at the top: The hex socket in the shank end allows direct adjustment with a hex key from the top, which is particularly practical where side access is difficult or space is limited.

Plain carbon steel: Made of high-quality carbon steel with high strength and strong load capacity, with a plain machined finish; surface anti-rust treatment can be provided on request.

 

Application Field

This product is widely used for equipment support and leveling, including machine and equipment bases, cabinets and enclosures, shelving and display stands, furniture and office desks, and conveyor and automation equipment. It is especially suitable for installation positions that require threaded height adjustment for stable support and leveling.

 

Instructions for use

Selection: Choose an adjusting bolt of suitable size according to the thread specification of the mounting hole, the required height adjustment range and the load requirements, and check that the threads, square neck and hex socket are in good condition.

Installation: Screw the threaded shank into the threaded hole or matching nut at the bottom of the equipment so that the flat disc head faces down and contacts the floor or supporting surface. When used at four corners, screw them in initially with adjustment allowance left.

Height adjustment: Use a wrench on the square neck to rotate and adjust the height, or use a hex key in the hex socket at the shank end, gradually leveling the equipment for stable support.

Locking and inspection: Lock with a lock nut once adjusted, and confirm the support is stable without wobbling; inspect and re-tighten periodically in vibrating environments.

 

Maintenance

Rust protection: The plain carbon steel surface has no plating protection; in humid environments or for long-term use, apply anti-rust oil or provide surface anti-rust treatment as required.

Periodic inspection: Check periodically whether the adjusting bolts are loose and whether the threads are corroded or damaged, and re-tighten or replace in time.

Thread cleaning: Keep the threads and hex socket clean and remove oil and dirt to ensure smooth adjustment.

Proper use: Use within the load capacity, avoid overload or heavy impact, and never reuse bolts with damaged threads.

 

FAQ

Q: What material is this adjusting bolt made of and how is it finished?

A: It is made of high-quality carbon steel with a plain machined finish (no plating). Surface anti-rust treatment can be provided on request; the specific material and process are subject to the product specification.

 

Q: What adjustment methods are available?

A: Both methods work: use a wrench on the square neck below the head to rotate and adjust, or use a hex key in the hex socket at the shank end, which is convenient in confined positions.

 

Q: What is the function of the flat disc head?

A: The flat disc head provides a large contact area and even load distribution, serving as the supporting and leveling face of the equipment so that support is more stable and less prone to sinking.

 

Q: How to select the right specification?

A: Choose the appropriate specification according to the mounting hole thread specification, the required height adjustment range and the equipment load requirements. Provide your installation parameters for sizing assistance.

 

Q: How to prevent rust and loosening on plain carbon steel parts?

A: The plain carbon steel surface has no plating, so apply anti-rust oil or provide surface anti-rust treatment in humid environments; lock with a lock nut once adjusted and re-tighten periodically in vibrating environments.

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