291:
191:
38:
135:
346:
Winged self-drilling have thin wings wider than the thread formed just behind the self drilling head. These cut a clearance hole in soft materials (such as wood or plastic), but are destroyed by more robust materials (such as metal). Thus, to clamp some material to metal, the clearance drilling, tap
259:, often in sheet materials. The lack of a sharp tip is helpful for packaging and handling and in some applications may be helpful for reducing the clearance necessary on the reverse of a fastened panel or for making more thread available on a given length screw.
306:
and fastener installation into one driving motion (instead of separate drilling, tapping, and installing motions); they are thus very efficient in a variety of hard-substrate applications, from
298:
Some self-tapping screws such as the Tek screw brand, are also self-drilling, which means that in addition to the thread-forming section there is also a fluted tip much like the tip of a
236:
For softer substrates such as wood or soft plastics, the self-tapping ability can come simply from a tip that tapers to a gimlet point (in which no flute is needed). Like the tip of a
338:
self-tapping screws are common in metal cases for electrical equipment, while flatter-headed truss or flat countersunk headed self-tapping screws are found in aviation applications.
431:
271:
material (especially plastic and thin metal sheets) without removing it, known as "thread-forming" self-tapping screws, and self-tappers with sharp cutting surfaces that
217:
For hard substrates such as metal or hard plastics, the self-tapping ability is often created by cutting a gap in the continuity of the thread on the screw, generating a
282:
or the three-fold symmetry of
Taptite screws, while thread-cutting screws may have one or more flutes machined into their threads, yielding cutting edges.
206:
design. Common features are the screw thread covering the whole length of the screw from tip to head and a pronounced thread hard enough for the intended
334:, the company which pioneered the manufacture of, but did not invent, these screws) are a type of screw which can form a thread in thin sheet metal.
629:
660:
551:
482:
581:
347:
drilling, thread tapping, and fixing itself can happen in a single operation from one side, with the materials in their final position.
55:
121:
679:
102:
74:
59:
81:
166:
its own hole as it is driven into the material. More narrowly, self-tapping is used only to describe a specific type of
406:
88:
48:
303:
279:
389:
are both examples of self-tapping screws used in surgery. Different thread profiles are used for either denser
70:
202:
Self-tapping screws have a wide range of tip and thread patterns, and are available with almost any possible
229:
cannot tap its own hole in a metal substrate, a self-tapping one can (within reasonable limits of substrate
507:
521:
452:
218:
195:
607:
585:
95:
278:
Thread-forming screws may have a non-circular plan view, such as the five-fold symmetry of the
656:
547:
488:
478:
386:
170:
screw intended to produce a thread in relatively soft material or sheet materials, excluding
648:
475:
Handbook of
Plastics Joining: a Practical Guide (in Plastics Design Library Handbook series)
311:
698:
570:. Vol. 33. New York: Breskin & Charlton Publishing Corporation. 1955. p. 41.
394:
244:, such a point forms the hole by displacement of the surrounding material rather than any
237:
382:
692:
390:
307:
241:
211:
314:. Some types incorporate a sealing washer, for fastening roofing sheets to purlins.
290:
190:
299:
17:
652:
411:
275:
the material as they are inserted, termed "thread-cutting" self-tapping screws.
222:
163:
37:
355:
256:
207:
203:
171:
143:
492:
230:
147:
371:
366:
Self-tapping screws are used in a variety of applications ranging from
630:"How do I Choose the Correct Self-Drilling and Self-Tapping Screws?"
544:
Residential
Construction Academy: Basic Principles for Construction
134:
335:
289:
245:
226:
189:
159:
139:
133:
322:
Sheet metal screws (sometimes called "sheet-metal self-tappers",
267:
Self-tapping screws can be divided into two classes: those that
643:
Perren, S. M. (1991). "1: Basic
Aspects of Internal Fixation".
358:
are technically self-tapping, but are not referred to as such.
367:
31:
174:. Other specific types of self-tapping screw include
294:
A self-drilling screw and three thread-cutting screws
251:Not all self-tapping screws have a sharp tip. The
62:. Unsourced material may be challenged and removed.
546:(5th ed.). Cengage Learning. p. 210.
647:. Berlin, Heidelberg: Springer. p. 108.
477:(2nd ed.). William Andrew. p. 107.
473:Troughton, Michael J., ed. (7 October 2008).
248:-forming drilling/cutting/evacuating action.
8:
255:tip is blunt and intended for use with a
122:Learn how and when to remove this message
522:"Self-Drilling vs. Self-Tapping Screws"
423:
221:and cutting edge similar to those on a
302:. These screws combine hole drilling,
7:
60:adding citations to reliable sources
508:"How Do Self-Drilling Screws Work?"
680:"Hold Everything", February 1946,
25:
263:Thread-forming vs. thread-cutting
138:Two thread-forming self-tapping
36:
47:needs additional citations for
628:Burlem, Eddie (3 April 2024).
542:Huth, Mark (7 February 2019).
407:Fasteners with a tapered shank
1:
146:. The countersunk head has a
568:Modern Plastics Encyclopedia
653:10.1007/978-3-662-02695-3_1
645:Manual of INTERNAL FIXATION
330:screws from the brand name
715:
225:. Thus, whereas a regular
582:"PK-Self Tapping Screws"
194:Self-tapping screw with
387:orthopedic bone screws
295:
199:
198:and type B (blunt) tip
151:
453:"Self Tapping Screws"
293:
193:
180:thread rolling screws
137:
608:"Sheet Metal Screws"
588:on 28 September 2017
286:Self-drilling screws
176:self-drilling screws
71:"Self-tapping screw"
56:improve this article
685:bottom of page 151
510:. Trade Warehouse.
342:Winged self-tapper
296:
200:
156:self-tapping screw
152:
662:978-3-642-08091-3
553:978-1-337-91382-9
484:978-0-8155-1581-4
318:Sheet metal screw
132:
131:
124:
106:
18:Sheet metal screw
16:(Redirected from
706:
667:
666:
640:
634:
633:
625:
619:
618:
616:
614:
604:
598:
597:
595:
593:
584:. Archived from
578:
572:
571:
564:
558:
557:
539:
533:
532:
530:
528:
518:
512:
511:
503:
497:
496:
470:
464:
463:
461:
459:
449:
443:
442:
440:
438:
428:
127:
120:
116:
113:
107:
105:
64:
40:
32:
21:
714:
713:
709:
708:
707:
705:
704:
703:
689:
688:
682:Popular Science
676:
671:
670:
663:
642:
641:
637:
627:
626:
622:
612:
610:
606:
605:
601:
591:
589:
580:
579:
575:
566:
565:
561:
554:
541:
540:
536:
526:
524:
520:
519:
515:
506:Arkless, Dave.
505:
504:
500:
485:
472:
471:
467:
457:
455:
451:
450:
446:
436:
434:
430:
429:
425:
420:
403:
395:cancellous bone
383:Dental implants
380:
364:
353:
344:
320:
288:
265:
188:
142:with different
128:
117:
111:
108:
65:
63:
53:
41:
28:
23:
22:
15:
12:
11:
5:
712:
710:
702:
701:
691:
690:
687:
686:
675:
674:External links
672:
669:
668:
661:
635:
620:
599:
573:
559:
552:
534:
513:
498:
483:
465:
444:
432:"Fastenerdata"
422:
421:
419:
416:
415:
414:
409:
402:
399:
393:or the spongy
379:
376:
363:
360:
352:
349:
343:
340:
319:
316:
308:assembly lines
287:
284:
264:
261:
187:
184:
168:thread-cutting
130:
129:
44:
42:
35:
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
711:
700:
697:
696:
694:
684:
683:
678:
677:
673:
664:
658:
654:
650:
646:
639:
636:
631:
624:
621:
609:
603:
600:
587:
583:
577:
574:
569:
563:
560:
555:
549:
545:
538:
535:
523:
517:
514:
509:
502:
499:
494:
490:
486:
480:
476:
469:
466:
454:
448:
445:
433:
427:
424:
417:
413:
410:
408:
405:
404:
400:
398:
396:
392:
391:cortical bone
388:
384:
377:
375:
373:
370:carpentry to
369:
361:
359:
357:
350:
348:
341:
339:
337:
333:
329:
325:
317:
315:
313:
309:
305:
301:
292:
285:
283:
281:
276:
274:
270:
262:
260:
258:
254:
249:
247:
243:
239:
234:
232:
228:
227:machine screw
224:
220:
215:
213:
212:case-hardened
209:
205:
197:
192:
185:
183:
181:
177:
173:
169:
165:
161:
157:
149:
145:
141:
136:
126:
123:
115:
104:
101:
97:
94:
90:
87:
83:
80:
76:
73: –
72:
68:
67:Find sources:
61:
57:
51:
50:
45:This article
43:
39:
34:
33:
30:
27:Type of screw
19:
681:
644:
638:
623:
611:. Retrieved
602:
590:. Retrieved
586:the original
576:
567:
562:
543:
537:
525:. Retrieved
516:
501:
474:
468:
456:. Retrieved
447:
435:. Retrieved
426:
381:
365:
362:Applications
354:
345:
332:Parker Kalon
331:
327:
323:
321:
300:center drill
297:
280:pentalobular
277:
272:
268:
266:
252:
250:
235:
233:and depth).
216:
201:
179:
175:
167:
155:
153:
118:
109:
99:
92:
85:
78:
66:
54:Please help
49:verification
46:
29:
437:10 November
356:Wood screws
172:wood screws
527:9 November
458:9 November
418:References
351:Wood screw
257:pilot hole
204:screw head
112:April 2017
82:newspapers
493:212375843
304:threading
208:substrate
186:Mechanism
162:that can
693:Category
613:14 April
592:14 April
401:See also
378:Surgical
336:Pan-head
269:displace
231:hardness
210:, often
148:Pozidriv
372:surgery
312:roofing
150:recess.
96:scholar
699:Screws
659:
550:
491:
481:
273:remove
253:type B
242:gimlet
140:screws
98:
91:
84:
77:
69:
219:flute
196:flute
160:screw
158:is a
144:heads
103:JSTOR
89:books
657:ISBN
615:2017
594:2017
548:ISBN
529:2017
489:OCLC
479:ISBN
460:2017
439:2017
385:and
246:chip
238:nail
178:and
75:news
649:doi
412:Tap
368:DIY
326:or
324:P–K
310:to
240:or
223:tap
164:tap
58:by
695::
655:.
487:.
397:.
374:.
328:PK
214:.
182:.
154:A
665:.
651::
632:.
617:.
596:.
556:.
531:.
495:.
462:.
441:.
125:)
119:(
114:)
110:(
100:·
93:·
86:·
79:·
52:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
