Rolled Collars - Vibration Isolator and Vibration Absorber

Nyltite Rolled Collars fit under the heads of screws nuts, rivets or the like. Their design provides a lock-and-seal mechanism (see below) that makes them far superior to any conventional washer. Their design enables them to act in concert with screws and bolts as sealing and locking fasteners, and depending on the application, vibration insulators. They cause the screw to lock in place and at the same time create a seal that is incredibly resistant to harsh temperature and chemical environments.
The collar is a section of extruded tubular nylon rolled backward upon itself as shown in the illustration. The benefit of this design is a controlled flow during the tightening process providing unique characteristics that washers typically do not. These characteristics include Lock-and-Seal, electrical insulation, mechanical isolation, thermal isolation and vibration resistance.

rolled_collar_fasteners rolled_collar_assembly

How It Works as a Faster / Sealer

Nyltite Rolled Collar for Vibrator ControlWhen a fastener equipped with a Nyltite rolled collar is tightened, the collar compresses and the nylon is forced to flow inwards, away from the structurally strong outer rim, contrary to the conventional compressible washer that flows away from the fastener.  This is the mechanism of Controlled Flow.  As a result of this inward flow, the screw head, the shank and the work piece become filled with the highly compressible plastic material of the Nyltite Rolled Collar forming an excellent screw / bolt lock, screw / bolt seal, insulator and isolator.

Versatility and Customization
Because the Nyltite rolled collar inherently exhibits several advantageous characteristics listed above, we can design it so that any one characteristic or combination of characteristics are enhanced to fit your application.  For example, we can design it to be an excellent electrical insulator, thermal insulator and/or isolator, depending on your requirements. Mechanical and electrical isolation from the work piece can eliminate galvanic corrosion.  We can also design it to eliminate chipping and crazing of the surface of the screw threads and work piece. 

The natural lubricity of the assembled Nyltite nylon rolled collar reduces friction during the tightening process, requiring less torque to get full screw tension than do assemblies without a Nyltite nylon rolled collar.  This characteristic provides a lock and/or sealing assembly which we can enhance to fit your application. 


Vibration Absorbers and Isolators by Nyltite
Ability to Withstand Harsh Environments

Nyltite Rolled Collars maintain the integrity of the lock and seal, insulation and isolation through the harshest of environments.  These collars resist attack by salt water, hot oils, refrigerants, alkalis, diluted mineral acids and most solvents and chemicals.  The working temperature range for this product is –70° F to +250° F.

Relationship to other Nyltite Products
When fitted with a shank extension, the Nyltite Rolled Collar becomes a Nyltite Headed Sleeve.  The Nyltite Headed Sleeve has all the fastening and sealing properties as does the Rolled Collar and in addition, provides other functions as described in the Nyltite Headed Sleeve section.

 


STANDARD ROLLED COLLAR SELECTION SPECIFICATIONS

PART SCREW NOMINAL ID W OD CD TH CH   DRILL
NUMBER SIZE (DEC. INCH) +.004/-.003 +/-.002 +/-.008 +/-.030 +/-.030 (REF)   SIZE
                     
NRC-02 2 .086 .088 .012 .112 .175 .065 .050   #31
NRC-03 3 .099 .101 .012 .125 .185 .070 .055   #29
NRC-04 4 .112 .116 .013 .140 .195 .080 .065   #25
NRC-05 5 .125 .129 .014 .159 .210 .085 .070   #19
NRC-06 6 .138 .142 .015 .172 .225 .095 .075   #15
NRC-08 8 .164 .168 .015 .198 .270 .115 .080   #5
NRC-10 10 .190 .194 .017 .228 .300 .115 .080   A
NRC-12 12 .216 .220 .017 .254 .330 .125 .100   G
NRC-14 1/4 .250 .252 .020 .292 .365 .125 .100   N
NRC-15 5/16 .313 .316 .020 .356 .460 .130 .105   T
NRC-16 3/8 .375 .379 .020 .419 .535 .160 .125   27/64
NRC-17 7/16 .438 .441 .022 .486 .600 .170 .135   31/64
NRC-18 1/2 .500 .504 .022 .548 .645 .195 .155   9/16
NRC-19 5/8 .625 .629 .025 .679 .800 .210 .160   11/16
NRC-20 3/4 .750 .754 .028 .810 .935 .220 .170   13/16
NRC-21 7/8 .875 .890 .032 .954 1.030 .240 .180   15/16
NRC-22 1.0 1.000 1.005 .035 1.075 1.280 .250 .185   1 3/32


STANDARD ROLLED COLLAR HOLE SIZES

PLEASE NOTE THESE SIZES ARE TO BE USED AS A GUIDE ONLY. EACH APPLICATION IS UNIQUE AND REQUIRES YOUR TESTING TO ENSURE PROPER FIT FOR YOUR APPLICATION.
PARTICULAR APPLICATIONS MAY REQUIRE MORE OR LESS NYLON. CUSTOM SIZES ARE USUALLY READILY AVAILABLE

WE WILL BE HAPPY TO PROVIDE SAMPLES.

SCREW NOMINAL MAX OD DRILL
SIZE (DEC. INCH) +/.008 SIZE
1 .073 .099 7/64
2 .086 .112 #31
3 .099 .125 #29
4 .112 .140 #25
5 .125 .159 #19
6 .138 .172 #15
8 .164 .198 #5
10 .190 .228 A
12 .216 .254 G
1/4 .250 .292 N
5/16 .313 .356 T
3/8 .375 .419 27/64
7/16 .438 .486 31/64
1/2 .500 .548 9/16
5/8 .625 .679 11/16
3/4 .750 .810 13/16
7/8 .875 .954 15/16
1.0 1.000 1.075 1 3/32



We also offer a selection of Rolled Collars to fit metric screws and bolts.
Always call before you think we don’t have it– we can usually make what you need.


METRIC ROLLED COLLAR SELECTION SPECIFICATIONS

PART SCREW NOMINAL ID W OD CD TH CH
NUMBER SIZE (DEC. INCH) +.004/-.003 +/-.002 +/-.008 +.025/-.015 +/-.030 (REF)
11653 M2 .078 .078 .012 .110 .161 .070 .055
NRC-02.5M M2.5 .098 .098 .012 .122 .174 .080 .064
10079 M3 .118 .118 .013 .144 .198 .080 .064
10081 M4 .157 .157 .015 .187 .245 .108 .082
11752 M5 .196 .196 .017 .230 .310 .115 .092
10097 M6 .236 .236 .017 .270 .354 .122 .012
11750 M8 .3153 .315 .020 .355 .472 .132 .105
11751 M10 .393 .393 .020 .433 .509 .156 .124
10235 M12 .473 .473 .022 .517 .615 .175 .140
NRC14M M14 .551 .551 .022 .595 .700 .192 .155
11652 M16 .629 .629 .025 .679 .800 .210 .160
Order Nyltite Fasteners Today! SAMPLES CAN BE PROVIDED UPON REQUEST
CUSTOM SIZES ARE USUALLY READILY AVAILABLE
CALL 1-800-635-5238 FOR MORE INFORMATION OR TO ORDER


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