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Insulating Washers
Technical / Engineering Data		 Contact Us
Insulating Washers        Standard e-Catalog
Length of Shoulder (for shoulder washer only)
Choose & write down your
LENGTH OF SHOULDER code-
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 		Order Code Dimension E
(See diagram in insulating washers charts)
A .015
B .025
C .040
E .058
F .085
G .120
H .182
J .215
K .245
M .300
R .360
S .425
V .490
Material Selection

    MATERIALS

 Choose & write down your
MATERIAL code-
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  		SPECIFICATIONS

   Nylon

 N

 Mil - P - 17091B Type 1

   Teflon®

 T

 Mil - P -19468A

   Glass Filled Lexan®

 L

 LP- 393 A

   Ultem®

U

 GE 1000 Resins

   Delrin®

 D

 LP- 392 A

   Phenolic- Linen Based*  

 P

 MIL- I - 24768 / 15

    *Unicorp uses only higher quality linen based  Phenolic not water- based Phenolic, which is less expensive but may crack.

    RoHS Compliance Statement    DFARS   WEEE
Properties for Non- Metallic Materials

Properties

 Phenolic
 Linen Based		 Teflon® Nylon Lexan®
10% Glass
Filled

Delrin®

Ultem®
Flammability Rating V-1 UL HB UL 94V-2 V-O UL94HB V-O
Water Absorption
(%) 24 hrs.		 0.6 - 0.7 .02 1.5 0.15 0.25 0.25
Dielectric Constant
(60 cycles)		 5.2 - 5.3 2.1 10 2.9 3.7 3.15
Dielectric Strength
1/8 thickness (v/mil)		 350 400 300- 400 380 500 N/A
Arc Resistance (sec) 100 200 140 10 129 120
Tensile Strength (psi) 6,500- 7,000 2,700- 3,100 11,200- 16,500 9,000 10,400 16,500
Heat Resistance (continuous degrees F) 250- 275 550 250 270 250 340
Compression Strength (psi) 201- 235 700- 1,200 4,000 - 11,000 12,500 18,000 22,000
Tolerances  (for shoulder washer only)

A

 Major Diameter ± .005
B Shank Diameter + .000 / - .005
C Thickness of Head ± .005
D Inside Diameter + .006 / - .000
E Length of Shoulder ± .005
L Overall Length +.010/ -.005
Tolerances  (for flat washer only)

A

 Major Diameter + .010 / - .005
C Thickness .015  through  .063 ± .003
.064  through  .091 ± .006
.092 up   ± .009
D Inside Diameter + .010 / - .000
UNICORP, MFR. IDENT. Code No. 04729
For Modified Parts or Engineering Assistance:
Unicorp offers your firm engineering and design services for customized or
modified parts at no additional charge. Please call our Engineering Department.
Toll Free: 1- 800- 526- 1389       Phone: 973- 674-1700        Fax: 973- 674- 3803
UNICORP is a worldwide leader in manufacturing stock & custom electronic hardware, handles
 & precision fasteners used by leading companies in nearly every industry since 1971.
 
Unicorp,  291 Cleveland St., Orange, NJ  07050   USA
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