What is a #10 thread?

Size 10 crochet thread is slightly thinner than most yarn, slightly thicker than size 3 or 5 threads. Beginners to thread crochet often find that this is a good size to start with. Size 20 and 30 crochet thread are common options.

What does BA stand for in bolts?

British Association screw threads, or BA screw threads, are a set of small screw threads, the largest being 0BA at 6 mm diameter.

What is the smallest BA screw size?

British Association Threads (BA) The thread size varies from BA number 23 (0.33 mm diameter with a pitch of 0.09 mm) to BA number 0 (6mm diameter with a pitch of 1 mm).

What size thread is M10?

ISO Metric Machine Screw Thread Dimensions

Thread Size	Nominal Diameter (mm)	Thread Pitch (mm)
M8	8.0	1.25
M10	10.0	1.50
M12	12.0	1.75
M14	14.0	2.00

Are BA threads metric?

BA threads are specified by British Standard BS 93:1951 sizes 0 B.A. to 16 B.A. The sizes were actually defined in metric terms, an 0BA thread having a 6 mm diameter and 1 mm pitch. Although 0BA has the same diameter and pitch as an M6 coarse, the threads have different forms and are not compatible.

Is BA a metric?

The threadform of BA screws is quite different from metric. 0 BA has the same O.D. as M6 (6mm obviously) and a 1mm thread pitch but that’s where the similarity ends. The smaller BA sizes don’t match any other metric thread being literally scaled down versions of the size immediately above.

What are BA screw sizes?

BA size chart

Screw Numbers	Diameter of Screw Over Thread	Size
8 BA	0.086 inch	Number drill 50 1.8 mm 0.0709 inch
7 BA	0.0982 inch	Number drill 46 2.05 mm 0.0807 inch
6 BA	0.11 inch	2.3 mm 0.0906 inch
5 BA	0.126 inch	Number drill 37 2.65 mm 0.1043 inch

What is a 10 32 thread size?

10-32 Threads The number “10” is a size designator with no numerical meaning. The number “32” refers to 32 threads per inch. You can identify a 10-32 screw by measuring the diameter at exactly 3/16″ (4.76 mm).

What is the size of a BA thread?

6BA Clearance size 34 Tap size 44. 8 BA Clearance size 44 Tap size 54. Not exactly optimum sizes, but close enough for most everyday use, and saves having to look up tables each time.

When to use m or BA screw threads?

BS 93 British Association (BA) Screw Threads Data Charts British Association Standard Screw Threads are used mainly for instruments and clocks. The BA-series screw threads should not be used for new designs. Instead use the M-series screw threads.

What are the specifications for British Association screw threads?

BS 93:1951 — Specification for British Association (B.A.) screw threads with tolerances for sizes 0 B.A. to 16 B.A. BS 93:2008 — British Association (B.A.) screw threads — Requirements The angle of the thread is 47.5° and the depth of thread is 0.6 times the pitch with rounded tops and bottoms.

What is the pitch of a K-BA screw thread?

The pitch of 0BA is 1 mm and the pitch of each higher numbered thread is obtained by multiplying the pitch of the lower number by 0.9 so K-BA has a pitch of p = 0.9 K rounded to two significant figures in mm.