Unc And Unf Bolts Stainless Steel Grade 304 Choose Coarse Or Fine Thread
UNC and UNF Bolts Specification (ANSI B18.2.1 / A2) Made from Grade 304 Stainless Steel
Unified National Coarse (UNC) and Unified National Fine (UNF) bolts conforming to ANSI B18.2.1 and made from grade 304 stainless steel (A2) are widely used for their good corrosion resistance and overall strength. Grade 304 stainless steel is an austenitic steel known for its versatility and excellent corrosion resistance, particularly in mild environments.
General Specifications:
- Material: Grade 304 Stainless Steel (A2)
- Corrosion Resistance: Good resistance to oxidation and corrosion in various environments.
- Mechanical Properties: Adequate tensile strength and toughness for general-purpose use.
- Thread Standards: Unified National Coarse (UNC) and Unified National Fine (UNF)
- Thread Angle: 60 degrees
- Thread Profiles:
- UNC: Coarse threads, which are more robust and easier to assemble in softer materials.
- UNF: Fine threads, which provide better holding power in hard materials and precise adjustments.
Spanner (Wrench) Sizes for UNC and UNF Bolts:
The table below lists the appropriate spanner sizes for commonly used UNC and UNF bolts.
|
Bolt Size |
Threads Per Inch (UNC) |
Threads Per Inch (UNF) |
Spanner Size (Across Flats) |
Across Corners |
|---|---|---|---|---|
|
1/4 |
20 (UNC) |
28 (UNF) |
7/16" (11.11 mm) |
0.505" (12.83 mm) |
|
5/16 |
18 (UNC) |
24 (UNF) |
1/2" (12.70 mm) |
0.577" (14.65 mm) |
|
3/8 |
16 (UNC) |
24 (UNF) |
9/16" (14.29 mm) |
0.650" (16.51 mm) |
|
7/16 |
14 (UNC) |
20 (UNF) |
5/8" (15.88 mm) |
0.794" (20.17 mm) |
|
1/2 |
13 (UNC) |
20 (UNF) |
3/4" (19.05 mm) |
0.866" (21.99 mm) |
|
5/8 |
11 (UNC) |
18 (UNF) |
15/16" (23.81 mm) |
1.150" (29.21 mm) |
|
3/4 |
10 (UNC) |
16 (UNF) |
1-1/8" (28.58 mm) |
1.299" (32.99 mm) |
|
7/8 |
9 (UNC) |
14 (UNF) |
1-5/16" (33.34 mm) |
1.505" (38.23 mm) |
|
1 |
8 (UNC) |
12 (UNF) |
1-1/2" (38.10 mm) |
1.732" (43.99 mm) |
Detailed Description:
1/4-20 UNC / 1/4-28 UNF:
- Spanner Size: 7/16" (11.11 mm)
- Applications: Light machinery, electronics, and household applications where corrosion resistance is important.
5/16-18 UNC / 5/16-24 UNF:
- Spanner Size: 1/2" (12.70 mm)
- Applications: Furniture assembly, automotive components. Suitable for moderate load-bearing connections needing good corrosion resistance.
3/8-16 UNC / 3/8-24 UNF:
- Spanner Size: 9/16" (14.29 mm)
- Applications: Structural joints, motor mounts. Commonly used in construction, providing strong and reliable connections.
7/16-14 UNC / 7/16-20 UNF:
- Spanner Size: 5/8" (15.88 mm)
- Applications: Heavy machinery, construction equipment. Ideal for applications requiring higher strength and load-bearing capacity with good corrosion resistance.
1/2-13 UNC / 1/2-20 UNF:
- Spanner Size: 3/4" (19.05 mm)
- Applications: Automotive frames, industrial machinery. Widely used in various industrial applications for securing parts and components in environments where moderate corrosion resistance is required.
5/8-11 UNC / 5/8-18 UNF:
- Spanner Size: 15/16" (23.81 mm)
- Applications: Bridge construction, large machinery. Provides high strength for heavy-duty applications requiring durability and resistance to mild environments.
3/4-10 UNC / 3/4-16 UNF:
- Spanner Size: 1-1/8" (28.58 mm)
- Applications: Heavy equipment, structural applications. Ensures stability and strength in heavy construction and industrial setups with added benefit of corrosion resistance.
7/8-9 UNC / 7/8-14 UNF:
- Spanner Size: 1-5/16" (33.34 mm)
- Applications: High-load applications, infrastructure projects. Suitable for high-stress applications where durability and corrosion resistance are critical.
1-8 UNC / 1-12 UNF:
- Spanner Size: 1-1/2" (38.10 mm)
- Applications: Industrial installations, large-scale construction. Used in major structural applications due to its high load-bearing capacity and resistance to corrosion.
Summary
UNC and UNF bolts made from grade 304 stainless steel (A2) offer good strength and corrosion resistance, making them suitable for a variety of industrial and construction applications. The specified spanner sizes ensure proper fit and torque application, facilitating efficient and secure assembly. These bolts are preferred for their reliability and performance in mild environments, providing long-lasting durability and safety.
UNC and UNF Bolts Specification (ANSI B18.2.1 / A2) Made from Grade 304 Stainless Steel
Unified National Coarse (UNC) and Unified National Fine (UNF) bolts conforming to ANSI B18.2.1 and made from grade 304 stainless steel (A2) are widely used for their good corrosion resistance and overall strength. Grade 304 stainless steel is an austenitic steel known for its versatility and excellent corrosion resistance, particularly in mild environments.
General Specifications:
- Material: Grade 304 Stainless Steel (A2)
- Corrosion Resistance: Good resistance to oxidation and corrosion in various environments.
- Mechanical Properties: Adequate tensile strength and toughness for general-purpose use.
- Thread Standards: Unified National Coarse (UNC) and Unified National Fine (UNF)
- Thread Angle: 60 degrees
- Thread Profiles:
- UNC: Coarse threads, which are more robust and easier to assemble in softer materials.
- UNF: Fine threads, which provide better holding power in hard materials and precise adjustments.
Spanner (Wrench) Sizes for UNC and UNF Bolts:
The table below lists the appropriate spanner sizes for commonly used UNC and UNF bolts.
|
Bolt Size |
Threads Per Inch (UNC) |
Threads Per Inch (UNF) |
Spanner Size (Across Flats) |
Across Corners |
|---|---|---|---|---|
|
1/4 |
20 (UNC) |
28 (UNF) |
7/16" (11.11 mm) |
0.505" (12.83 mm) |
|
5/16 |
18 (UNC) |
24 (UNF) |
1/2" (12.70 mm) |
0.577" (14.65 mm) |
|
3/8 |
16 (UNC) |
24 (UNF) |
9/16" (14.29 mm) |
0.650" (16.51 mm) |
|
7/16 |
14 (UNC) |
20 (UNF) |
5/8" (15.88 mm) |
0.794" (20.17 mm) |
|
1/2 |
13 (UNC) |
20 (UNF) |
3/4" (19.05 mm) |
0.866" (21.99 mm) |
|
5/8 |
11 (UNC) |
18 (UNF) |
15/16" (23.81 mm) |
1.150" (29.21 mm) |
|
3/4 |
10 (UNC) |
16 (UNF) |
1-1/8" (28.58 mm) |
1.299" (32.99 mm) |
|
7/8 |
9 (UNC) |
14 (UNF) |
1-5/16" (33.34 mm) |
1.505" (38.23 mm) |
|
1 |
8 (UNC) |
12 (UNF) |
1-1/2" (38.10 mm) |
1.732" (43.99 mm) |
Detailed Description:
1/4-20 UNC / 1/4-28 UNF:
- Spanner Size: 7/16" (11.11 mm)
- Applications: Light machinery, electronics, and household applications where corrosion resistance is important.
5/16-18 UNC / 5/16-24 UNF:
- Spanner Size: 1/2" (12.70 mm)
- Applications: Furniture assembly, automotive components. Suitable for moderate load-bearing connections needing good corrosion resistance.
3/8-16 UNC / 3/8-24 UNF:
- Spanner Size: 9/16" (14.29 mm)
- Applications: Structural joints, motor mounts. Commonly used in construction, providing strong and reliable connections.
7/16-14 UNC / 7/16-20 UNF:
- Spanner Size: 5/8" (15.88 mm)
- Applications: Heavy machinery, construction equipment. Ideal for applications requiring higher strength and load-bearing capacity with good corrosion resistance.
1/2-13 UNC / 1/2-20 UNF:
- Spanner Size: 3/4" (19.05 mm)
- Applications: Automotive frames, industrial machinery. Widely used in various industrial applications for securing parts and components in environments where moderate corrosion resistance is required.
5/8-11 UNC / 5/8-18 UNF:
- Spanner Size: 15/16" (23.81 mm)
- Applications: Bridge construction, large machinery. Provides high strength for heavy-duty applications requiring durability and resistance to mild environments.
3/4-10 UNC / 3/4-16 UNF:
- Spanner Size: 1-1/8" (28.58 mm)
- Applications: Heavy equipment, structural applications. Ensures stability and strength in heavy construction and industrial setups with added benefit of corrosion resistance.
7/8-9 UNC / 7/8-14 UNF:
- Spanner Size: 1-5/16" (33.34 mm)
- Applications: High-load applications, infrastructure projects. Suitable for high-stress applications where durability and corrosion resistance are critical.
1-8 UNC / 1-12 UNF:
- Spanner Size: 1-1/2" (38.10 mm)
- Applications: Industrial installations, large-scale construction. Used in major structural applications due to its high load-bearing capacity and resistance to corrosion.
Summary
UNC and UNF bolts made from grade 304 stainless steel (A2) offer good strength and corrosion resistance, making them suitable for a variety of industrial and construction applications. The specified spanner sizes ensure proper fit and torque application, facilitating efficient and secure assembly. These bolts are preferred for their reliability and performance in mild environments, providing long-lasting durability and safety.
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