Threads and Threading - Sportpilot.info
Threads and Threading - Sportpilot.info
Threads and Threading - Sportpilot.info
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Nominal Size,<br />
<strong>Threads</strong> per Inch,<br />
<strong>and</strong> Series<br />
Designation a<br />
Class<br />
Table 3. (Continued) St<strong>and</strong>ard Series <strong>and</strong> Selected Combinations — Unified Screw <strong>Threads</strong><br />
Allowance<br />
Machinery's H<strong>and</strong>book 27th Edition<br />
Externalb Internalb Major Diameter Pitch Diameter<br />
UNR Minor<br />
Dia., c Max<br />
Minor Diameter Pitch Diameter<br />
Major<br />
Diameter<br />
Max (Ref.) Class<br />
d Min Mine Maxd Min Min Max Min Max Min<br />
19 ⁄ 16 –16 UN 2A 0.0016 1.5609 1.5515 — 1.5203 1.5151 1.4864 2B 1.495 1.509 1.5219 1.5287 1.5625<br />
3A 0.0000 1.5625 1.5531 — 1.5219 1.5180 1.4880 3B 1.4950 1.5033 1.5219 1.5270 1.5625<br />
19 ⁄ 16 –18 UNEF 2A 0.0015 1.5610 1.5523 — 1.5249 1.5199 1.4949 2B 1.502 1.515 1.5264 1.5329 1.5625<br />
3A 0.0000 1.5625 1.5538 — 1.5264 1.5227 1.4964 3B 1.5020 1.5105 1.5264 1.5312 1.5625<br />
19 ⁄ 16 –20 UN 2A 0.0014 1.5611 1.5530 — 1.5286 1.5238 1.5016 2B 1.508 1.520 1.5300 1.5362 1.5625<br />
3A 0.0000 1.5625 1.5544 — 1.5300 1.5264 1.5030 3B 1.5080 1.5162 1.5300 1.5346 1.5625<br />
15 ⁄ 8–6 UN 2A 0.0025 1.6225 1.6043 — 1.5142 1.5060 1.4246 2B 1.445 1.475 1.5167 1.5274 1.6250<br />
3A 0.0000 1.6250 1.6068 — 1.5167 1.5105 1.4271 3B 1.4450 1.4646 1.5167 1.5247 1.6250<br />
15 ⁄ 8 –8 UN 2A 0.0022 1.6228 1.6078 1.6003 1.5416 1.5342 1.4784 2B 1.490 1.515 1.5438 1.5535 1.6250<br />
3A 0.0000 1.6250 1.6100 — 1.5438 1.5382 1.4806 3B 1.4900 1.5047 1.5438 1.5510 1.6250<br />
15 ⁄ 8 –10 UNS 2A 0.0019 1.6231 1.6102 — 1.5581 1.5517 1.5041 2B 1.517 1.538 1.5600 1.5683 1.6250<br />
15 ⁄ 8 –12 UN 2A 0.0018 1.6232 1.6118 — 1.5691 1.5632 1.5240 2B 1.535 1.553 1.5709 1.5785 1.6250<br />
3A 0.0000 1.6250 1.6136 — 1.5709 1.5665 1.5258 3B 1.5350 1.5448 1.5709 1.5766 1.6250<br />
15 ⁄ 8 –14 UNS 2A 0.0017 1.6233 1.6130 — 1.5769 1.5714 1.5383 2B 1.548 1.564 1.5786 1.5858 1.6250<br />
15 ⁄ 8 –16 UN 2A 0.0016 1.6234 1.6140 — 1.5828 1.5776 1.5489 2B 1.557 1.571 1.5844 1.5912 1.6250<br />
3A 0.0000 1.6250 1.6156 — 1.5844 1.5805 1.5505 3B 1.5570 1.5658 1.5844 1.5895 1.6250<br />
15 ⁄ 8 –18 UNEF 2A 0.0015 1.6235 1.6148 — 1.5874 1.5824 1.5574 2B 1.565 1.578 1.5889 1.5954 1.6250<br />
3A 0.0000 1.6250 1.6163 — 1.5889 1.5852 1.5589 3B 1.5650 1.5730 1.5889 1.5937 1.6250<br />
15 ⁄ 8–20 UN 2A 0.0014 1.6236 1.6155 — 1.5911 1.5863 1.5641 2B 1.571 1.582 1.5925 1.5987 1.6250<br />
3A 0.0000 1.6250 1.6169 — 1.5925 1.5889 1.5655 3B 1.5710 1.5787 1.5925 1.5971 1.6250<br />
15 ⁄ 8 –24 UNS 2A 0.0013 1.6237 1.6165 — 1.5966 1.5922 1.5741 2B 1.580 1.590 1.5979 1.6037 1.6250<br />
111 ⁄ 16 –6 UN 2A 0.0025 1.6850 1.6668 — 1.5767 1.5684 1.4866 2B 1.507 1.538 1.5792 1.5900 1.6875<br />
3A 0.0000 1.6875 1.6693 — 1.5792 1.5730 1.4891 3B 1.5070 1.5271 1.5792 1.5873 1.6875<br />
111 ⁄ 16 –8 UN 2A 0.0022 1.6853 1.6703 — 1.6041 1.5966 1.5365 2B 1.552 1.577 1.6063 1.6160 1.6875<br />
3A 0.0000 1.6875 1.6725 — 1.6063 1.6007 1.5387 3B 1.5520 1.5672 1.6063 1.6136 1.6875<br />
111 ⁄ 16 –12 UN 2A 0.0018 1.6857 1.6743 — 1.6316 1.6256 1.5865 2B 1.597 1.615 1.6334 1.6412 1.6875<br />
3A 0.0000 1.6875 1.6761 — 1.6334 1.6289 1.5883 3B 1.5970 1.6073 1.6334 1.6392 1.6875<br />
Copyright 2004, Industrial Press, Inc., New York, NY<br />
1750<br />
UNIFIED SCREW THREADS
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