产品说明

1/4-20 UNC Stainless Steel 304 Hex Bolts

我们的 1/4-20 UNC Stainless Steel 304 Hex Bolts are durable inch-size fasteners designed for reliable fastening in machinery, equipment, construction, furniture, automotive repair, outdoor projects, and general industrial applications.

由高品质制成 304 不锈钢, these hex bolts offer good corrosion resistance, clean appearance, and long-lasting performance. The 1/4-20 UNC coarse thread design provides easy installation and strong thread engagement. Each bolt features a standard hex head, allowing convenient tightening with a wrench, spanner, or socket tool.

These bolts are available in multiple lengths from 3/8 inch to 5 inches and can be supplied with matching hex nuts, flat washers, and spring washers for complete assembly use.

主要特点

304 不锈钢材质 for good corrosion resistance and durability.
1/4-20 UNC thread: 1/4 inch diameter with 20 threads per inch.
Fully threaded design for maximum thread engagement.
Hex head style for easy installation with standard tools.
Right-hand thread direction for standard fastening applications.
Coarse thread spacing for quick installation and general-purpose use.
多种长度可供选择 from 3/8″ to 5″.
Pack of 100 pieces, suitable for repair, assembly, and bulk use.
Optional matching nuts and washers available for complete fastening sets.

产品规格

项目	描述
产品名称	1/4-20 UNC Stainless Steel Hex Bolt
材质	不锈钢 304
尺寸	1/4-20
螺纹标准	UNC
螺纹类型	粗牙螺纹
螺纹方向	右手
螺纹加工	全螺纹
头型	六角头
测量系统	英寸
Available Lengths	3/8″ to 5″
Package	Pack of 100
配套零件	Hex Nuts, Flat Washers, Spring Washers

What Does 1/4-20 UNC Mean?

标记	含义
1/4	Bolt diameter is 1/4 inch
20	20 threads per inch, also called 20 TPI
UNC	全国统一粗牙螺纹
右手	Standard thread direction, tightened clockwise
全螺纹	Thread runs along the full shank length

1/4-20 UNC is one of the most common inch thread sizes used in American standard fasteners. It is widely used in machinery, equipment, metalwork, woodwork, repair, and general assembly.

Available Length Options

直径	螺纹类型	Available Lengths
1/4-20	UNC粗牙螺纹	3/8″
1/4-20	UNC粗牙螺纹	1/2″
1/4-20	UNC粗牙螺纹	3/4″
1/4-20	UNC粗牙螺纹	7/8″
1/4-20	UNC粗牙螺纹	1″
1/4-20	UNC粗牙螺纹	1-1/4″
1/4-20	UNC粗牙螺纹	1-3/8″
1/4-20	UNC粗牙螺纹	1-1/2″
1/4-20	UNC粗牙螺纹	1-5/8″
1/4-20	UNC粗牙螺纹	1-3/4″
1/4-20	UNC粗牙螺纹	2″
1/4-20	UNC粗牙螺纹	2-1/4″
1/4-20	UNC粗牙螺纹	Up to 5″

Matching Fastener Options

These stainless steel hex bolts can be supplied as individual bolts or as a complete fastening kit.

配套件	功能
六角螺母	Locks with the bolt to complete fastening
平垫圈	Distributes load and protects the surface
弹簧垫圈	有助于提高防松性能
螺栓+螺母+垫圈组	Convenient for assembly and maintenance

Using matching 304 stainless steel nuts and washers is recommended when corrosion resistance and consistent material performance are required.

材质优势：不锈钢304

304 stainless steel is one of the most widely used stainless steel materials for fasteners. It provides a good balance of corrosion resistance, strength, appearance, and cost performance.

材质	特点	推荐用途
不锈钢 304	Good corrosion resistance and clean finish	Indoor, outdoor, machinery, furniture, general equipment
不锈钢 316	在恶劣环境下具有更好的耐腐蚀性	Marine, coastal, chemical, high-humidity applications
碳钢	Higher strength options available, lower cost	Dry indoor use, coated industrial fasteners

For general outdoor and indoor fastening, 304 stainless steel 1/4-20 UNC hex bolts 是一个实用且可靠的选择。

常见应用

应用领域	典型用途
机械组装	Equipment fastening and maintenance
汽车维修	Brackets, panels, and replacement parts
建筑工程	Light structural fastening and installation
家具组装	Metal and wood connections
DIY项目	Home repair and custom projects
电气设备	Mounting panels, boxes, and frames
户外使用	一般耐腐蚀紧固
工业维护	Replacement screws, bolts, and hardware kits

产品优势

这些 1/4-20 UNC Stainless Steel 304 Hex Bolts are designed for users who need reliable, corrosion-resistant inch fasteners. The fully threaded body provides strong holding power, while the hex head allows secure tightening with common hand tools.

的 pack of 100 is convenient for workshops, repair departments, contractors, factories, and distributors. Multiple length options allow customers to choose the correct bolt for different assembly thicknesses and fastening requirements.

安装注意事项

订购前，请确认以下详细信息：

所需信息	示例
螺纹尺寸	1/4-20 UNC
长度	3/8″, 1/2″, 1″, 2″, 5″
材质	不锈钢 304
数量	Pack of 100 or bulk order
配套配件	Nuts, flat washers, spring washers
应用	Machinery, furniture, automotive, outdoor project

Please make sure the bolt is used with a matching 1/4-20 UNC nut or threaded hole. Metric nuts or other thread types will not fit correctly.

常问问题

Q1: What does 1/4-20 mean?

1/4-20 means the bolt diameter is 1/4 inch, and the thread has 每英寸 20 个螺纹.

Q2：UNC是什么意思？

UNC means 全国统一粗牙螺纹. It is a common American inch coarse thread standard.

Q3: Are these bolts metric or inch size?

这些是 inch-size bolts, not metric bolts.

Q4: What material are these bolts made from?

它们是由 304 不锈钢, which offers good corrosion resistance and durability.

Q5: Are these bolts fully threaded?

Yes. These bolts are 全螺纹, which means the thread runs along the full shank length.

Q6: What thread direction do these bolts have?

They are right-hand thread bolts, which means they tighten clockwise and loosen counterclockwise.

Q7: What lengths are available?

Available lengths range from 3/8 inch to 5 inches, including common sizes such as 1/2″, 3/4″, 1″, 1-1/2″, 2″, and 2-1/4″.

Q8: Does the package include nuts and washers?

The product can be supplied as bolts only or with matching nuts, flat washers, and spring washers 根据客户要求。

Q9: Can these bolts be used outdoors?

Yes. 304 stainless steel has good corrosion resistance and is suitable for many indoor and outdoor environments. For marine or highly corrosive environments, 316 stainless steel may be recommended.

Q10: Can I use metric nuts with these bolts?

No. These bolts require matching 1/4-20 UNC nuts. Metric nuts are not compatible.

产品简短摘要

1/4-20 UNC Stainless Steel 304 Hex Bolts are fully threaded inch-size hex head fasteners made from corrosion-resistant 304 stainless steel. Available in lengths from 3/8″ to 5″, these bolts are suitable for machinery, automotive repair, furniture assembly, construction, outdoor projects, and industrial maintenance. Matching nuts, flat washers, and spring washers are available for complete fastening solutions.