Flat & Shoulder Washers (Fibre & Nylon)
Offer Strength, Durability and Attractive Appearance

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Keystone offers a large assortment of Nylon and Fibre Flat Washers, Shoulder Washers and Bushings.

Flat Washers

Flat washers are manufactured in 0.032", 0.047" and 0.062" (0,81mm, 1,19mm and 1,57mm) thicknesses and for clearance holes ranging from #2 through 0.375" screws (M2 through M8). Outside diameters for the washers range from 0.187" through 1.000" (4,75mm to 25.40mm). Materials consist of Nylon grade 6/6 per ASTM D4066 and commercial grade fibre per ASTM D710.

Shoulder Washers & Bushings

The fibre shoulder washers are manufactured with outside diameters of 0.250" to 0.750" [6,35 to 19,05] in 0.062" [1,57] increments in thicknesses of 0.031", 0.047" and 0.062" (0,81mm, 1,19mm and 1,57mm). Clearance holes are made to accommodate #2 through 0.375" screws (M2 through M8) in a choice of mounting hole diameters from 0.125" through 0.250" (3,18mm to 6,35mm) to fit panel or chassis holes in thicknesses of 0.015" to 0.031" (0,38mm to 0,78mm). Material is commercial grade fibre per ASTM D710.

The Nylon shoulder washers and bushings are available with outside diameters ranging from 0.181" to 0.513" (4,59mm to 13,03mm) in thicknesses from 0.030" to 0.062" (0,76mm to 1,57mm). Clearance holes are made to accommodate #2 through 0.250" screws (M2 through M6). The mounting hole diameters are from 0.125" to 0.312" (3,18mm to 7,92mm) with thicknesses from 0.025" to 0.750" (0,63 to 19,05mm). Material is molded grade 6/6 Nylon ASTM D4066.

Custom designs and product modifications are available on request. Application engineering services are available to meet special customer requirements. Contact Us for samples or requests.


Flat Washers
Clear Hole SizeChoice of:
.098 [2,49] Hole Dia. - #2 [M2] Screw Fibre Nylon
.120 [3,05] Hole Dia. - #4 [M2,5] Screw Fibre Nylon
.140 [3,56] Hole Dia. - #6 [M3] Screw Fibre Nylon
.171 [4,34] Hole Dia. - #8 [M4] Screw Fibre Nylon
.196 [4,29] Hole Dia. - #10 [M5] Screw Fibre Nylon
.260 [6,60] Hole Dia. - .250 [M6] Screw Fibre Nylon
.385 [9,65] Hole Dia. - .375 [M8] Screw Fibre Nylon

Shoulder Washers & Bushings
Clear Hole SizeChoice of:
.090-.095 [2,49-2,41] Hole Dia. - #2 [M2] Screw Fibre Nylon
.115-.125 [2,92-3,18] Hole Dia. - #4 [M2,5] Screw Fibre Nylon
.140-.145 [3,56-3,68] Hole Dia. - #6 [M3] Screw Fibre Nylon
.170-.171 [4,32-4,34] Hole Dia. - #8 [M4] Screw Fibre Nylon
.194-.200 [4,93-5,08] Hole Dia. - #10 [M5] Screw Fibre Nylon
.253-.265 [6,43-6,73] Hole Dia. - .250 [M6] Screw Fibre Nylon
.385 [9,65] Hole Dia. - .375 [M8] Screw Fibre Nylon


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