Question

Please help with table sample. Appendix B is provided below. Thanks.

Table sample: ¼ diameter fine thread

Thread Note	¼ - 28 UNF
Minor Diameter	.211
Pitch	1/28 = .0357

1. 7/8 coarse thread

Thread Note
Minor Diameter
Pitch

2. ¾ diameter fine thread

Thread Note
Minor Diameter
Pitch

3. ½ diameter coarse thread

Thread Note
Minor Diameter
Pitch

2. Using Table B.3.4 complete the following information

Nominal Screw Size	Normal Fit Hole Size	Counterbore Diameter
#10	.221	3/8
3/8
3/4
1 1/2

[ Appendix B- Threads and Fasteners B.1) UNIFIED NATIONAL THREAD FORM P Pitch (Extenal Threads) Approximate Minor diameter D-1.0825P Extra Fine UNEF Fine UNF Coarse UNC Basic Major Diameter (D) Thds. Per in. Tap Drill Dia. Tap Drill Dia Nominal Size, Thds Per in. Tap Drill Dia Thds. Per in in. 3/64 80 72 64 56 0.060 0.0730 0.0860 0.0990 0.1120 0.1250 #0 0.0595 0.0700 0.0820 0.0935 0.0595 0.0700 0.0785 ... 64 #1 . 56 #2 48 #3 48 0.0890 0.1015 0.1065 0.1360 ... 40 #4 0.1040 0.1130 0.1360 44 40 #5 . 40 . 32 #6 0.1380 0.1640 36 32 32 #8 0.1590 0.1495 24 0.1900 0.2160 #10 # 12 1/4 32 0.1850 0.1820 28 0.1770 24 7/32 32 0.2130 0.272 28 0.2010 20 0.2500 9/32 11/32 24 32 32 0.257 18 0.3125 5/16 3/8 7/16 1/2 0.332 24 5/16 0.368 27/64 16 0.3750 28 28 13/32 25/64 29/64 33/64 20 14 0.4375 0.5000 15/32 20 13 33/64 24 18 12 31/64 9/16 5/8 11/16 0.5625 24 37/64 37/64 17/32 18 11 0.6250 0.675 41/64 24 45/64 21/32 11/16 20 0.7500 0.8125 0.8750 0.9375 1.0000 1.1250 1.2500 16 10 3/4 20 49/64 13/16 7/8 49/64 14 13/16 20 53/64 57/64 61/64 1 5/64 1 3/16 1 5/16 1 7/16 1 9/16 15/16 20 8 7/8 12 59/64 1 3/64 1 11/64 1 19/64 1 27/64 20 63/64 1 7/64 1 1/8 12 7 18 7 1 1/4 12 18 1.3750 1 3/8 6 1 7/32 12 18 1,5000 1.6250 1 1/2 1 11/32 12 18 1 5/8 ... 18 1.7500 5 1 3/4 1 9/16 .. . 1.8750 2.0000 2.2500 2.5000 2.7500 17/8 ... .. 4 1/2 2 1 25/32 2 1/32 2 1/4 2 1/2 .. 2 1/4 4 1/2 . 2 1/2 4 ... ... 2 3/4 4 ASME B1.1-2003 Standard. Reprinted from the standard listed by pemission of the American Society of Mechanical Engineers. All rights reserved. B.3.4) Drill and counterbore sizes for socket head cap screws Appendix B- Threads and Fasteners1 60° B 600 Nominal Size of Screw (D) #0 (0.0600) #1 (0.0730) # 2 (0.0860) # 3 (0.0990) #4 (0.1120) # 5 (0.1250) #6 (0.1380) #8 (0.1640) # 10 (0.1900) 1/4 Nominal Drill Size (A) Close Fit (#51) 0.067 (#46) 0.081 3/32 (#36) 0.106 1/8 Counterbore Diameter (B) Countersink (C) Normal Fit (#49) 0.073 (#43) 0.089 (#36) 0.106 (#31) 0.120 (#29) 0.136 (#23) 0.154 (#18) 0.170 (#10) 0.194 (#2) 0.221 9/32 1/8 0.074 5/32 0.087 0.102 0.115 3/16 7/32 7/32 0.130 9/64 1/4 0.145 (#23) 0.154 (#15) 0.180 (#5) 0.206 9/32 0.158 5/16 0.188 3/8 0.218 17/64 7/16 0.278 0.346 11/32 17/32 21/64 5/16 5/8 0.415 13/32 25/64 3/8 0.483 15/32 23/32 29/64 33/64 7/16 0.552 13/16 17/32 1/2 0.689 1 21/32 41/64 5/8 0.828 1 3/16 25/32 49/64 3/4 7/8 0.963 1 3/8 1 5/8 29/32 11/32 57/64 1 1/64 1 9/32 1.100 1.370 2 1 5/16 1 1.640 2 3/8 1 9/16 1 1/4 1 17/32 1.910 2 3/4 113/16 2 1/16 1 1/2 1 25/32 2 1/32 2.180 3 1/8 1 3/4 Notes on next page. 1112

Answer 1

Solution- (A) /8 Coanse thyead g UNC Thread Not e (TN) D -o8 25P Mimor diameten (mD): 0.815 1 25 MD 0 7547 pitch(P) 9 fine duameten tea thread - ( 3/4 3/4 16 UNF TN 5ר 0י (50 0. 68 23 E 0 06 25 6 cS Scanned with CamScanner

2 diameten coance thread TN 13 UNC 2 108 25 (위 13 Nominal Scdew Normal fit hole Countenbor Si za diameten A 1332 518 3/g 25/32 314 13/16 C CS Scanned with CamScanner Moo