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Tap End Studs ASTM A193 GR.B7 Black Finish
Item No.：
B-008
Category：
Summary
We passed the ISO9001:2000 quality management system certification in 2019, and organized and trained an elite team of professional production, inspection, sales and distribution.
Tel: +86-574-86520006
E-mail: info@nbasme.com，sales@nbasme.com
Description
The inch shape standard for Tap End Studs is established in accordance with ASME B18.31.2. ASME Standards Committee B18 for the Standardization of Bolts, Nuts, Rivets, Screws, Washers and Similar Fasteners (formerly American National Standards Committee B18) was organized in March 1922 as Sectional Committee B18 under the aegis of the American Engineering Standards Committee (later the American Standards Association, then the United States of America Standards Institute, and, as of October 6, 1969, the American National Standards Institute, Inc. [ANSI]) with the Society of Automotive Engineers (SAE) and the American Society of Mechanical Engineers(ASME)as joint sponsors.
ASTM A193 - This specification covers alloy and stainless steel bolting for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. B7 is a grade in the ASTM A193 standard. It covers mechanical properties, chemical composition requirements. So Tap End Studs ASTM A193 GR.B7 is a stud product/fastener suitable for use under high temperature or high pressure. Tap End Studs ASTM A193 GR.B7 specifies a minimum yield strength of 75ksi. Minimum tempering temperature is 1100°F.
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Nominal |
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Size |
|
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|
Diameter, |
Tap-End Full Thread |
Umax = 2P |
Minimum Nut-End Full Thread Length, |
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D |
Length, Bm |
UNC and |
|
|
Bmin [Note (3)] |
||||
|
[Note (2)] |
Nominal |
Min. |
Max. |
NC-5 Thread |
UNF Thread |
8UN Thread |
L≤10 |
10＜L≤16 |
L＞16 |
|
1/4 |
0.375 |
0.350 |
0.400 |
0.100 |
0.071 |
... |
0.750 |
1.000 |
1.500 |
|
5/16 |
0,469 |
0.440 |
0.498 |
0.111 |
0.083 |
... |
0.875 |
1.125 |
1.625 |
|
3/8 |
0.563 |
0.532 |
0.594 |
0.125 |
0.083 |
... |
1.000 |
1.250 |
1.750 |
|
7/16 |
0.656 |
0.620 |
0.692 |
0.143 |
0.100 |
... |
1.125 |
1.375 |
1.875 |
|
1/2 |
0.750 |
0.708 |
0.792 |
0.154 |
0.100 |
... |
1.250 |
1.500 |
2.000 |
|
9/16[Note(4)] |
0.844 |
0.802 |
0.896 |
0.167 |
0.111 |
... |
1.375 |
1.625 |
2.125 |
|
5/8 |
0.938 |
0.892 |
0.983 |
0.182 |
0.111 |
... |
1.500 |
1.750 |
2.250 |
|
3/4 |
1.125 |
1.075 |
1.175 |
0.200 |
0.125 |
... |
1.750 |
2.000 |
2.500 |
|
7/8 |
1.313 |
1.258 |
1.368 |
0.222 |
0.143 |
... |
2.000 |
2.250 |
2.750 |
|
1 |
1.500 |
1.438 |
1.562 |
0.250 |
0.167 |
... |
2.250 |
2.500 |
3.000 |
|
1-1/8 |
1.688 |
1.625 |
1.750 |
0.286 |
0.167 |
0.250 |
2.500 |
2.750 |
3.250 |
|
1-1/4 |
1.875 |
1.813 |
1.938 |
0.286 |
0.167 |
0.250 |
2.750 |
3.000 |
3.500 |
|
1-3/8 |
2.063 |
2.000 |
2.125 |
0.333 |
0.167 |
0.250 |
3.000 |
3.250 |
3.750 |
|
1-1/2 |
2.250 |
2.188 |
2.313 |
0.333 |
0.167 |
0.250 |
3.250 |
3.500 |
4.000 |
|
1-5/8 |
2.438 |
2.375 |
2.500 |
... |
... |
0.250 |
3.500 |
3.750 |
4.250 |
|
1-3/4 |
2.625 |
2.563 |
2.688 |
0.400[Note(5)] |
... |
0.250 |
3.750 |
4.000 |
4.500 |
|
1-7/8 |
2.813 |
2.75 |
2.875 |
... |
... |
0.250 |
4.000 |
4.250 |
4.750 |
|
2 |
3.000 |
2.925 |
3.075 |
0.444[Note(5)] |
... |
0.250 |
4.250 |
4.500 |
5.000 |
|
2-1/4 |
3.375 |
3.300 |
3.450 |
0.444[Note(5)] |
... |
0.250 |
4.750 |
5.000 |
5.500 |
|
2-1/2 |
3.750 |
3.675 |
3.825 |
0.500[Note(5)] |
... |
0.250 |
5.250 |
5.500 |
6.000 |
|
2-3/4 |
4.125 |
4.050 |
4.200 |
0.500[Note(5)] |
... |
0.250 |
5.750 |
6.000 |
6.500 |
|
3 |
4.500 |
4.425 |
4.575 |
0.500[Note(5)] |
... |
0.250 |
|
6.500 |
7.000 |
|
3-1/4 |
4.875 |
4.775 |
4.975 |
0.500[Note(5)] |
... |
0.250 |
|
7.000 |
7.500 |
|
3-1/2 |
5.250 |
5.150 |
5.350 |
0.500[Note(5)] |
... |
0.250 |
|
7.500 |
8.000 |
|
3-3/4 |
5.625 |
5.525 |
5.725 |
0.500[Note(5)] |
... |
0.250 |
|
8.000 |
8.500 |
|
4 |
6.000 |
5.900 |
6.100 |
0.500[Note(5)] |
... |
0.250 |
|
8.500 |
9.000 |
GENERAL NOTE:
B = full nut-end thread length
Bm = tap-end thread length (full threads)
Lt = overall length (nominal length). See para.7.3 for length increments and Table 5 for tolerances on overall stud lengths.
S =standoff (when installed) = Lt- Bm
U = length to first full form thread
NOTES:
1. See section 8 for end requirements.
2. See Table 4 for body diameters for full body or reduced-body studs.
3. Total thread length to the last scratch shall not exceed Bmin plus five thread pitches.
4. Nonpreferred size; not recommended for new design due to limited availability.
5. UNC only.
A193 Mechanical Property Requirements
|
Grade |
Diameter, inch |
Minimum Tempering Temperature, °F |
Tensile Strength ksi |
Yield Strength, 0.2 % offset, ksi |
2 in Elongation % |
Reduction of Area, % |
Hardness, max |
|
|
min |
min |
min |
min |
Brinell |
Rockwell |
|||
|
B7 |
Up to 2-1/2 |
1100 |
125 |
105 |
16 |
50 |
321 HBW |
35 HRC |
|
Over 2-1/2 to 4 |
1100 |
115 |
95 |
16 |
50 |
321 HBW |
35 HRC |
|
|
Over 4 to 7 |
1100 |
100 |
75 |
18 |
50 |
321 HBW |
35 HRC |
|
A193 Chemical Composition Requirements (%)
|
Element |
C |
Mn |
P, max |
S, max |
Si |
Cr |
Mo |
Ni |
|
B7 (AISI 4140) |
0.37-0.49 |
0.65-1.10 |
0.035 |
0.040 |
0.15-0.35 |
0.75-1.20 |
0.15- 0.25 |
- |
Product Information
|
Item Name: |
Tap End Studs ASTM A193 GR.B7 Black Finish |
|
Material: |
B7(Alloy steel, AISI 4140/4142, Carton steel) |
|
Threads: |
B18.1.1 2A 3A UNC UN UNF |
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Finish: |
Black |
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Services: |
According to drawings or samples to manufacture products. Support OEM/ODM services |
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Package: |
1. Plastic bag with outer carton 2. According to your requirements |
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Delivery time: |
3-7 days for sample order, 10-20 days for full container order We will provide shipping information to you anytime |
A193 Recommended Accessories A193
|
Bolt Grade |
Nuts |
Washers |
|
B7 |
A194 Grade 2H |
F436 |
About Us
Ningbo ASME Fastener provides hex bolts, hex nuts, stud bolts, flat washers and nonstandard construction fasteners directly to contractors, oil industry, shipbuilding industry and other construction-related companies worldwide.
We manufacture threaded fasteners from 3/8" to 4" or M8 to M100 in diameter. Our main standard grades are: Threaded rods ASTM A193 GR. B7, B7M, B8, B8M, B16. Hex bolts ASTM A325, A325M A490, 490M, DIN933, DIN931. Hex nuts: ASTM A194 GR. 2H, 2HM, 7, 7L, 8, 8M, Grade 5, DIN934. Flat washers: ASTM F436, F436M, DIN125.
With more than 20 years of production experience, our bolts are found all over the world. “Our bolts are not necessarily the best, but we will produce better bolts every time” Keep up the good work - Fastener People.
FAQ
1. Q: Can you provide certificate of origin and material test reports for your Tap End Studs ASTM A193 GR.B7 Black Finish?
A: Sure. We can provide files for both. Normally we provide these files after studs production is complete.
2. Q: I want the finish on my Tap End Studs ASTM A193 GR.B7 to be Teflon sprayed. Is this okay?
A: Yes, it is. We have our own Teflon coating processing production line and can also provide Xylan coatings.
3. Q: I want to mark our own brand name on the nut, is that ok?
A: Yes it is. We can mark according to your requirements.
Online Message
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SERVICE HOTLINE:
Address：No. 100, Tianshen Road, Tiangu Industrial Zone, Jiulonghu Town, Zhenhai District, Ningbo, Zhejiang, China.
M.T.：+86-18967865853
TEL：+86-574-86520006
E-mail：info@nbasme.com，sales@nbasme.com
+86-18967865853
+86-574-86520006
info@nbasme.com
sales@nbasme.com
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