FBS37787-37125A
Mechanical Properties
3/8 X 7-7/8 Stainless Steel, Annealed, Full Base Weld Stud
Material: Stainless 302/304
Material Density US/metric: 0.284 / 0.00787
Spec: 302
Material Density US/metric: 0.284 / 0.00787
Spec: 302
Standard: ASTM A493/AWS D1.6
Thread Class: N/A
Fastener: 3/8
Thread Class: N/A
Fastener: 3/8
Fastener Dimensional Properties
| Nominal Diameter (in) | Threads per Inch | Calculated Pitch Diameter (in) | Calculated Minor Diameter (in) |
|---|---|---|---|
| 0.375 | 0.00 | N/A | N/A |
| Effective Weld Base Diameter | Calculated Stress Area Full Body (in2) | Calculated Stress Area Pitch (in2) | Calculated Stress Area Threadsa (in2) |
|---|---|---|---|
| N/A | 0.1104 | N/A | N/A |
Material Properties
| Ultimate Tensile Strength Minb (PSI)/(MPa) | Yield Tensile Strength Minb (PSI)/(MPa) | Proof Tensile Strength Minc (PSI)/(MPa) 90% YTM |
Yield Shearing Stress Minc (PSI)/(MPa) 0.577*YTM |
|---|---|---|---|
| 70,000 | 35,000 | 31,500 | 20,195 |
Thread Mechanical Properties
| Tensile | ||||
|---|---|---|---|---|
| Ultimate Tensile Strength Min UTM*SAT | Yield Tensile Strength Min YTM*SAT | Proof Load Tensile Strength PTM*SAT | Preload Reused Tensiled 75% PL |
Preload Permanente 90% PL |
| N/A | N/A | N/A | N/A | N/A |
| Torque | Shear | |||
|---|---|---|---|---|
| Friction Coefficientf | Torque Reused FC*PR*ND | Torque Permanent FC*PP*ND | Torque Ultimateg FC*UTS*ND | Yield Shear Minh YSM*SAT |
| N/A | N/A | N/A | N/A | N/A |
Fastener Body Mechanical Properties
| Tensile | Shear | ||
|---|---|---|---|
| Full Diameter Yield Tensile Strength Min YTM*SAF |
Pitch Diameter Yield Tensile Strength Min YTM*SAP |
Full Diameter Yield Shear Min YSM*SAF |
Pitch Diameter Yield Shear Min YSM*SAP |
| 3,866 | N/A | 2,230 | N/A |
| a | Stress area for the threads is calculated on an area approximately half way between the root diameter and pitch diameter. This more closely reflects actual results versus using root diameter for stress area calculations |
| b | Data provided by our suppliers |
| c | Proof Tensile is estimated to be 90% of Yield Tensile when Proof Tensile data is not readily available. |
| d | Preload for reuse of threaded fastener is 75% of Proof Load. Fastener may be rebolted multiple times with no degradation. |
| e | Preload for permanent installation of fastener is 90% of Proof Load. Fastener is permanently stretched and will not achieve the same clamping force on reuse. |
| f | Friction Coefficient will vary greatly depending on bolting conditions including lubrication. 0.2 is standard when bolt condition is plain finish or unknown. |
| g | Ultimate Torque is not useful in designing a bolted joint. Preloaded torque is more practical. This data is provided as a reference only. |
| h | Using the distortion-energy theory; Maximum Shear Stress equals .577 times the Maximum Tensile. |
Source: "Mechanical Engineering Design", 5th ed.; Shigley and Mischke, McGraw Hill, © 1989.
CAUTION: Fasteners should not be used at their tensile or shear limits. A safety factor must be applied to engineering calculations. The particular safety factor will vary depending on the application. Customers should always evaluate fasteners for suitability of their own applications.
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