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Visual Precision Web Catalog
Thread Charts


Should your particular thread form needs are not appear here, we can certainly meet your requirements. We have an extensive library of reference material documenting most threads used around the world. Go ahead, put us to WORK!


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Thumbnail #29 No. 29
American National Basic
Thread Form

For checking thread angles, root and crest-forms and depth, from 4 to 80 pitch thread, as defined in the Federal Standard Handbook H-28


Thumbnail #30 No. 30
Unified Basic Thread Form
For checking thread angles, root and crest-forms and depth, from 4 to 80 pitch threads, as defined in the 1978 edition of Federal Standard H-28.

Thumbnail #32

No. 32
ISO Metric Screw Threads
For checking thread angles, root and crest-forms and depth, from .25 to 6.0 mm pitch threads, as defined in the 1978 edition to Federal Standard H-28. Also available in same format as chart no. 36 (single pitch threads).


Thumbnail #33 No. 33
UNJ Basic Thread Form
Military Spec. 8879A

For checking thread angles, root and crest-forms and depth, from .25 to 6.0 mm pitch threads, as defined in the 1973 Military Specification Manual MIL-S-8879A..
Also available in same format as chart no. 36 (single pitch threads).

Thumbnail #34

No. 34
ISO Tape Pipe Threads
For rapid checking of thread form, lead, taper, truncation, and included angle.

Thumbnail #36 No. 36
American National
Form Taper Pipe Thread

For rapid checking thread form, lead, taper, etc., as defined in the 1978 edition of Federal Standard H-28.

· CATALOG INTRODUCTION
· STANDARD ANGLE CHARTS
· TOOL ROOM CHARTS
· PROTRACTOR CHARTS
· RADIUS & PROTRACTOR CHARTS
· THREAD CHARTS
· HAND HELD CHECKING DISCS
· HAND HELD PRECISION SCALES
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