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Metric Insulating Washer
Technical / Engineering Data		 Contact Us
Metric insulating Washers       Metric e-Catalog 
Length of Shoulder
(For Shoulder Washers Only)
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LENGTH OF SHOULDER code
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Dimension E

Order Code Dimension E
(see diagram in
insulating washers charts)

A

1mm

.039

B

2mm

.078

C

3mm

.118

D

4mm

.157

E

5mm

.196

F

6mm

.236

G

7mm

.275

H

8mm

.315

J

9mm

.354

K

10mm

.393

M

11mm

.433

R

12mm

.472

S

13mm

.511
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 Washers Only)

A

Major Diameter

± 0.15

B

Shank Diameter

+ 0.00 / - 0.15

C

Thickness of Head

± 0.15

D

Inside Diameter

+ 0.17 / - 0.00

E

Length of Shoulder

± 0.15

L

Overall Length

+ 0.26 / - 0.15
Tolerances
(For Flat Washers Only)

A

Major Diameter

 + 0.26 / - 0.15

C

Thickness

.4  through 1.6  ±  .16
1.7  through  2.4  ±  .23

D

Inside Diameter

+ .26 / - .00

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.
UNICORP, MFR. IDENT. Code No. 04729
 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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