UNC- Unified Coarse thread
UNF – Unified Fine thread
UNEF – Unified Extra Fine thread
Other Unifies series threads.
UN – Unified constant pitch
UNJ, UNR – Unified with rounded root
UNS – Unified special or non-standard
1”
TPI = TEETH PER INCH
#1 - 64 UNC | #0 - 80 UNF | #12 - 80 UNEF |
#2 - 56 UNC | #1 - 72 UNF | 1/4" - 32 UNEF |
#3 - 48 UNC | #2 - 64 UNF | 5/16" - 32 UNEF |
#4 - 40 UNC | #3 - 56 UNF | 3/8" - 32 UNEF |
#5 - 40 UNC | #4 - 48 UNF | 7/16" - 28 UNEF |
#6 - 32 UNC | #5 - 44 UNF | 1/2" - 28 UNEF |
#8 - 32 UNC | #6 - 40 UNF | 9/16" - 24 UNEF |
#10 - 24 UNC | #8 - 36 UNF | 5/8" - 24 UNEF |
#12 - 24 UNC | #10 - 32 UNF | 11/16" - 24 UNEF |
1/4" - 20 UNC | #12 - 28 UNF | 3/4" - 20 UNEF |
5/16" - 18 UNC | 1/4" - 28 UNF | 13/16" - 20 UNEF |
3/8" - 16 UNC | 5/16" - 24 UNF | 7/8" - 20 UNEF 0,875 |
7/16" - 14 UNC | 3/8" - 24 UNF | 15/16" - 20 UNEF |
1/2" - 13 UNC | 7/16" - 20 UNF | 1" - 20 UNEF |
9/16" - 12 UNC | 1/2" - 20 UNF | 1 1/16" - 18 UNEF |
5/8" - 11 UNC | 9/16" - 18 UNF | 1 1/8" - 18 UNEF |
3/4" - 10 UNC | 5/8" - 18 UNF | 1 1/4" - 18 UNEF |
7/8" - 9 UNC | 3/4" - 16 UNF | 1 5/16" - 18 UNEF |
1" - 8 UNC | 7/8" - 14 UNF | 1 3/8" - 18 UNEF |
1 1/8" - 7 UNC | 1" - 12 UNF | 1 7/16" - 18 UNEF |
1 1/4" - 7 UNC | 1 1/8" - 12 UNF | 1 1/2" - 18 UNEF |
1 3/8" - 6 UNC | 1 1/4" - 12 UNF | 1 9/16" - 18 UNEF |
1 1/2" - 6 UNC | 1 3/8" - 12 UNF | 1 5/8" - 18 UNEF |
1 3/4" - 5 UNC | 1 1/2" - 12 UNF | 1 11/16" - 18 UNEF |
2" - 4 1/2 UNC |
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2 1/4" - 4 1/2 UNC |
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2 1/2" - 4 UNC |
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2 3/4" - 4 UNC |
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3" - 4 UNC |
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3 1/4" - 4 UNC |
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3 1/2" - 4 UNC |
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3 3/4" - 4 UNC |
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4" - 4 UNC |
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