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Alpha Thread Gage, Inc.

"Leading the pack in the thread gage industry!"                                                                                  

·680 Ajax Drive, Madison Heights, MI 48071-4214·

1-800-267-0181 (TOLL FREE) · (248) 589-9310 · FAX (248)589-9315 · E-MAIL

STANDARD PRODUCTS: • Metric Thread Gages • Taperlock Thread Plug Gages • Reversible Thread Plug Gages • Helical Coil Gages • Thread Ring Gages & Truncated Thread Setting Plug Gages • Pipe Thread Gages •

HELICAL COIL GAGES (STI)
CLASS X TAPERLOCK DESIGN
SIZE THREADS PER INCH THREAD LENGTH (X) TOLERANCE
UNC UNF GO HI (NOT GO) GO MEMBER 2B-3B NOT GO MEMBER HANDLE
2 56   5/16 7/32 39.00 39.00 8.00
4 40 48 5/16 7/32 36.00 36.00 8.00
5 40   5/16 7/32 35.00 35.00 8.00
6 32 40 13/32 7/32 32.00 32.00 8.00
8 32 36 13/32 7/32 32.00 32.00 8.00
10 24 32 13/32 7/32 32.00 32.00 8.00
12 24   1/2 5/16 31.00 31.00 8.00
1/4 20 28 1/2 5/16 31.00 31.00 8.00
5/16 18 24 3/4 3/8 31.00 31.00 8.00
3/8 16 24 3/4 3/8 32.00 32.00 8.00
7/16 14 20 3/4 3/8 32.00 34.00 8.00
1/2 13 20 7/8 1/2 34.00 34.00 8.00
9/16 12 18 7/8 1/2 43.00 43.00 8.00
5/8 11 18 7/8 1/2 48.00 48.00 8.00
3/4 10 16 1.0 5/8 51.00 51.00 9.00
**Prices may change without notice.

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