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In the fastener designation: [tex]$3/8-24 \, UNF -1 \, B$[/tex], what is the thread diameter?

A. [tex]$3/8$[/tex]
B. 24
C. 1
D. [tex][tex]$3/4$[/tex][/tex]

Sagot :

GinnyAnsweridn
To determine the thread diameter from the fastener designation [tex]\( 3 / 8-24 \text{ UNF -1 B} \)[/tex], we focus on the first part of the designation, [tex]\( 3 / 8 \)[/tex].

Breaking it down step-by-step:

1. Understand the Fastener Designation: The designation [tex]\( 3 / 8-24 \text{ UNF -1 B} \)[/tex] includes the thread diameter, thread pitch, and other specifications.
- [tex]\( 3 / 8 \)[/tex]: Thread diameter
- [tex]\( 24 \)[/tex]: Threads per inch (TPI), indicating the number of threads per inch along the fastener.
- `UNF`: Unified National Fine thread, indicating a finer thread compared to standard or coarse threads.
- `-1 B`: Additional specification details.

2. Identifying the Thread Diameter: The thread diameter is given at the very beginning of the fastener designation. Here, [tex]\( 3 / 8 \)[/tex] represents the diameter of the thread in inches.

3. Conversion to Decimal Form: Converting [tex]\( 3 / 8 \)[/tex] from a fraction to a decimal, we get:
[tex]\[ 3 / 8 = 0.375 \][/tex]

Therefore, the thread diameter for the fastener designation [tex]\( 3 / 8-24 \text{ UNF -1 B} \)[/tex] is [tex]\( 0.375 \)[/tex] inches.
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