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48-2 Trilobular Thread Rolling Screws (48-2 Plastite Alternative)
Screws for Plastics
48-2 trilobular thread rolling screws are suitable alternatives to 48-2 Plastite screws.
steropsLike their Plastite counterparts, they are trilobular thread-rolling screws with a
specialized thread configuration specifically designed for u in plastics.
For Optimal Grip
48-2 Plastite alternative trilobular thread rolling screws have a deep and narrow 48 degree thread profile with extra wide spacing between threads and a twin lead thread (e Fig 1). The threads have a
pitch about twice that of a machine screw of same dimensions. This thread profile improves thread-forming and thread engagement within the plastic. In addition, the screws have a 3-lobe trilobular thread configuration which improves displacement of material into relief areas between lobes when driven into plastic. This further increas the resistance to vibrational looning forces eliminating the need for inrts and/or lock washers. The specialized threads also improve the integrity of the internal mating threads, which reduces material failure and increas holding power in plastic materials. The improved thread integrity also reduces stripping, pull-out and permits repeated removal and inrtion into the same tapped hole.
Fig 1
Easier to Drive
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The slightly tapered point and twin lead thread offers quicker and more effective screw penetration into the substrate. The twin lead thread penetrates the substrate about twice as fast as a fastener with comparable pitch and single lead thread. The three lobed design of the trilobular thread with full relief of the thread form allows recovery of the substrate and filling-in between the lobes when
turning. The features decrea the driving force needed during penetration of the screw.
The types and grades of plastics vary greatly as do the requirements for specific applications (eg. depth of engagement and manufacturing specifics). For this reason it is esntial to first establish the ideal size of the pilot hole for each application. Recommended pilot hole sizes for 48-2 plastite alternative screws of given diameters are available in the table 1.
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Table 1"D"
max
min max
min Soft Ductile Materials Brittle Materials
0-48 0.06650.06350.06350.0605-0.0480.0562-28 0.0920.0860.0890.0830.0020.0760.080
3-24 0.1100.1040.1060.1000.0020.0880.0944-20 0.1270.1210.1230.1170.0020.1000.1066-19 0.1470.1410.1430.1370.0030.1220.1287-18 0.1660.1600.1600.1540.0040.1340.1428-16 0.1850.1790.1790.1730.0040.1490.1589-15 0.1990.1930.1930.1870.0040.1620.17210-14 0.2120.2060.2080.2020.0040.1750.18512-11 0.2350.2290.2300.2240.0050.1950.2061/2-140.2320.2260.2260.2200.0050.1950.2051/4-100.2760.2700.2680.2620.0060.2240.2405/16-90.3450.3360.3350.3250.0060.2860.303Recommended Pilot Hole Sizes for 48-2 Trilobular Thread Rolling
Screws (Plastite Alternative Screws)
Tolerences on length
gene wilderthru 3/4" +/- 0.030"unless otherwi specified, all dimensions are in inches
Recommended Pilot Hole
Size
Minimum
out of
Round
Screw Size
Circumscribing circle
"C"
> 3/4" +/- 0.050"
all lengths +/- 0.050"
Across Center
0 thru 1/4" dia > 1/4" dia
Material:
- AISI1022 steel or equivalent quench and tempered ca hardened to Rockwell C45 min (core hardness Rockwell C28-38)
杰克逊经典歌曲mp3- 18-8 stainless steel (core hardness Rockwell B90-C20)
-
410 austentic stainless steel - annealed, quench and tempered (core hardness Rockwell C34-C42)Plating:
Carbon steel plastite alternative screws are available in clear zinc, black zinc and black oxide Stainless steel plastite alternative screws have no additional coating
SC196
SC197
Plastite Alternative Screws - Flat Phillips Drive Plastite Alternative Screws - Flat Phillips Drive Steel, Black Oxide Full Thread
Steel, Zinc Full Thread
48 degree Thread Profile with 2 Lead Threads 48 degree Thread Profile with 2 Lead Threads
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SC199
Plastite Alternative Screws - Flat Torx Drive Plastite Alternative Screws - Flat Undercut Steel, Zinc Full Thread
Phillips Drive Steel, Zinc Full Thread赞助商英文
48 degree Thread Profile with 2 Lead Threads 48 degree Thread Profile with 2 Lead Threads
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SC201
Plastite Alternative Screws - Flat Undercut Torx Drive Plastite Alternative Screws - Pan Phillips Drive Steel, Zinc Full Thread
Steel, Black Zinc Full Thread
48 degree Thread Profile with 2 Lead Threads 48 degree Thread Profile with 2 Lead Threads
Head Styles, Drives, Materials and Finishes of 48-2 Trilobular Thread Rolling Screws (48-2 Plastite Alternative Screws)
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SC203
Plastite Alternative Screws - Pan Phillips Drive Plastite Alternative Screws - Pan Phillips Drive Steel,
Black Oxide Full Thread
Steel, Zinc Full Thread
48 degree Thread Profile with 2 Lead Threads 48 degree Thread Profile with 2 Lead Threads
大致的英文SC204
SC205
Plastite Alternative Screws - Pan Torx Drive Plastite Alternative Screws - Pan Torx Drive Steel, Black Zinc Full Thread
Steel, Black Oxide Full Thread
48 degree Thread Profile with 2 Lead Threads 48 degree Thread Profile with 2 Lead Threads
SC206
SC207
Plastite Alternative Screws - Pan Torx Drive Plastite Alternative Screws - Truss Phillips Drive Steel, Zinc Full Thread
Steel, Zinc Full Thread一建合格标准
48 degree Thread Profile with 2 Lead Threads 48 degree Thread Profile with 2 Lead Threads
personalcenterSC208
SC209
Plastite Alternative Screws - Hex Indented Washer Plastite Alternative Screws - Hex Indented Washer Slotted - Steel, Zinc Full Thread
Unslotted - Steel, Black Oxide Full Thread 48 degree Thread Profile with 2 Lead Threads 48 degree Thread Profile with 2 Lead Threads
