Delivering High Quality Stainless Steel and Alloy Piping Products — Pipes, Tubes, Fittings, Flanges and more for Global Industries.
sales@savoypipinginc.com
Delivering High Quality Stainless Steel and Alloy Piping Products — Pipes, Tubes, Fittings, Flanges and more for Global Industries.
sales@savoypipinginc.com
Stud has a thread on full lengths or at both ends. Stud Bolts is having three components if washers are not used (two nuts and stud). If you used washer it would become five. Sometimes additional nuts are used for hydraulic tensioning with larger size stud bolts.
The length of Stud Bolt should be enough to cover entire Nut plus 1.5 to 3 threads exposed. Long studs must be avoided as it increases the chance of corrosion and other damage to exposed threads, which would make subsequent removal difficult. ASME B16.5 gives the required size of the stud. Length of the stud depends on the type of gasket and the maximum exposed thread requirements.
Stud Bolts Notes:
The length of metric Stud Bolts measured parallel to axis, is the distance from each Stud Bolt, including the point.
To allow the use of hydraulic tensioning equipment, larger dimension studs shall be often one diameter longer than "standard". That bolts to have plastic end cap protection..
Savoy Piping Inc. stocks B7 stud bolts from 3/8” - 4” diameter in Imperial Sizes: Plain (black) finish, Teflon Blue, and Cadium Plating. We also stocks B8 and B8M stud bolts. We can also provide larger stud bolts, stud bolts made from different materials (B8, B8M, Alloy 20, Monel, Hastelloy, Inconel, Titanium, etc), as well as different coatings. While many of the larger diameter items can be made available for a next-day delivery, some of the special alloys and coatings may be subject to a longer lead time.
Threads of Stud Bolts
Bolts threading are defined in ASME B1.1 Unified Inch Screw Threads, (UN and UNR Thread Form). The most common thread is a symmetrical form with a V-profile. The included angle is 60°. This form is widely used in the Unified thread (UN, UNC, UNF, UNRC, UNRF) form as the ISO / metric threads.
The advantage of a symmetrical threads is that they are easier to produce and inspect compared with non-symmetrical threads. These are typically used in general-purpose fasteners. Thread series cover designations of diameter/pitch combinations that are measured by the number of threads per inch (TPI) applied to a single diameter.
Standard Thread Pitches
Coarse thread series (UNC/UNRC) is the most widely used thread system and applied in most of the screws, bolts and nuts. Coarse threads are used for threads in low strength materials such as iron, mild steel, copper and softer alloy, aluminium, etc.. The coarse thread is also more tolerant in adverse conditions and facilitate quick assembly.
Fine thread series (UNF/UNRF) is commonly used in precision Applications and in there where require a higher tensile strength than the coarse thread series.
8 - Thread series (8UN) is the specified thread forming method for several ASTM standards including A193 B7, A193 B8/B8M, and A320. This series is mostly used for diameters one inch and above.
| Stud Bolts Size Range | 3/8" to 4" Diameter (Imperial & Standard) . |
| Stud Bolts Types | All Thread, Double End, Single End |
| Stud Bolts Industry Standards | ANSI – American National Standards Institute: ANSI B 18.2.4 2M, ANSI B 28.2.4 1M DIN: DIN 934, DIN 970 UTS – Unified Thread Standard: UNC, UNF, UNEF, UNS, NPT, NPTF ISO – International Organization for Standardization: ISO 4032, ISO 4033 |
| Stud Bolts Specification | ASTM A193 / ASME SA193 / ASTM A320 / ASME SA320 |
| Stud Bolts Grades | Carbon Steel: B7, B7M, L7 Stainless Steel:B8, B8 CL2, B8M, B8M CL2, B16 Exotic Alloys: A20, 17-4PH, Monel, Inconel, Incoloy, Hastelloy |
| Stud Bolts Surface Coating | Hot Dipped Galvanized Bolts, Phosphate Coated Bolts, Teflon Coated Bolts, Xylan Coated Bolts, Zinc Coated Bolts, Cadmium Coated Bolts, Electro Zinc plated Bolts, Electro Cadmium Plated Bolts, Ceramic Filled PTFE Coated Bolts, Electroless Nickel Plated Bolts, Zinc Nickel Coated Bolts, Aluminium Coated Bolts, Silver Coated Bolts, Zinc/Nickel by Electrodeposition Bolts, Dacromet Bolts, Geomet Bolts, Others Upon Request |
| Stud Bolts Packaging | Cartoon Box / Wooden Pallet / Wooden Box / Thread Protector |
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| NPS | DIA bolts (in) |
Length RF |
Length RTJ |
Number of bolts |
| 1/2 | 1/2 | 55 | 4 | |
| 3/4 | 1/2 | 65 | 4 | |
| 1 | 1/2 | 65 | 75 | 4 |
| 1.1/4 | 1/2 | 70 | 85 | 4 |
| 1.1/2 | 1/2 | 70 | 85 | 4 |
| 2 | 5/8 | 85 | 95 | 4 |
| 2.1/2 | 5/8 | 9 | 100 | 4 |
| 3 | 5/8 | 9 | 100 | 4 |
| 3.1/2 | 5/8 | 9 | 100 | 8 |
| 4 | 5/8 | 9 | 100 | 8 |
| 5 | 3/4 | 95 | 110 | 8 |
| 6 | 3/4 | 100 | 115 | 8 |
| 8 | 3/4 | 110 | 120 | 8 |
| 10 | 7/8 | 115 | 125 | 12 |
| 12 | 7/8 | 120 | 135 | 12 |
| 14 | 1 | 135 | 14 | 12 |
| 16 | 1 | 135 | 14 | 16 |
| 18 | 1.1/8 | 14 | 160 | 16 |
| 20 | 1.1/8 | 160 | 170 | 20 |
| 24 | 1.1/4 | 170 | 185 | 20 |
General notes: