Tap Markings Flashcards by Tyr Olafssen | Brainscape

Q

H

A

Above basic

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Q

G

A

Ground thread

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Q

L

A

Below basic

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Q

NS

A

American National Special Thread

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Q

Pitch diameter L1

A

Basic to basic minus .0005

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Q

Pitch diameter H1

A

Basic to basic plus .0005

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Q

Pitch diameter H2

A

Basic plus .0005 to .001

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Q

Pitch diameter H3

A

Basic plus .001 to .0015

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Q

Pitch diameter H4

A

Basic plus .0015 to .002

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Q

Pitch diameter H5

A

Basic plus .002 to .0025

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Q

Pitch diameter H6

A

Basic plus .0025 to .003

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Q

UNJ

A

Unified thread series

Controlled Root Radius

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Q

UNJC

A

Unified coarse thread series

Controlled root radius

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Q

UNJF

A

Unified fine thread series

Controlled root radius

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Q

STI

A

Special thread for helical coil

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