Washers

Applications for Washers

Washers come in many types and are used for a wide variety of applications. These disks, which are made of metal or non-metallic materials, are positioned underneath a nut, an axle bearing or a joint to mitigate friction, isolate components, prevent loosening, eliminate leakage or distribute pressure. They also help secure fasteners.

The metallic materials used to fabricate washers include stainless steel, titanium, aluminum, brass, copper-base alloy or bronze, copper, nickel-base alloy, spring steel, steel, hardened steel and zinc-plated washers.

The non-metallic materials of construction include rubber, ABS, asbestos, felt, leather, nylon, polyester, polycarbonate, polyethylene, PVC, polypropylene, PTFE and Mylar.

Types of Washers

There are many different types of washers, which manufacturers have designed for use with a wide variety of applications. Spring washers consist of a load-bearing apparatus, which provides a preload between two surfaces. Lock washers help secure fasteners.

Other common types of washers include:

•Flat washers
•C-washers
•D-shaped washers
•Countersunk (finishing) washers
•Torque washers

Specialty washers include copper sealing washers that are designed to seal with a certain force against the mating surfaces. Bonded sealing washers create a seal that provides a greater degree of corrosion protection than conventional washers do. Neoprene bonded seal washers are soft and resilient, but create an excellent bond to the metal washer, and forms a tight seal. This washer can be used to seal out air/water or dampen vibration and noise. A neoprene bonded seal washer is perfect for use with fragile materials that require some additional cushioning under a screw, head of a bolt or screw and preventing leaks by sealing joints.

Sealing washers help seal joints, prevent leakage and provide cushioning under the head of the bolt or nut. Bonded washers are used in combination with a gasket. Rubber bonded washers are fabricated to very precise standards. The washer ensures a perfect fit because the rubber material will not slip. A rubber bonded washer has excellent resistance to cleaning agents and fuel residue.

Washer Dimensions

The thickness and height of your washer represents important design considerations, because the values describe the axial cross-section and working height of a spring washer. Zinc-plated bonded washers and other washers typically reference a gauge thickness value, which consists of the standardized dimension in the industry for tube and strip steel products. For example, a bonded washer with the gage number 0000 would have a thickness of 0.500”, while a washer with a gauge number of 36 would have a thickness of 0.004”

When specifying the dimensions of washers, most people use the nominal ANSI sizes and refer to the size of the fastener that the washer is designed to mate with. The nominal ANSI values used to describe the size of the washer should represent the inner diameter of the washer as closely as possible. Keep in mind that the outside dimension of the washer is always larger.

neoprene bonded washer

EDPM NEOPRENE BONDED WASHERS

  • GALVANIZED STEEL
PART # SIZE OUTSIDE DIAMETER PART # SIZE OUTSIDE DIAMETER
812GW 8 x 1/2″ 12MM 1058GW 10 x 5/8″ 16MM
891GW 8 x 9/16″ 14MM 1291GW 12 x 9/16″ 14MM
858GW 8 x 5/8″ 16MM 1258GW 12 x 5/8″ 16MM
1012GW 10 x 1/2″ 12MM 1491GW 14 x 9/16″ 14MM
1091GW 10 x 9/16″ 14MM 1458GW 14 x 5/8″ 16MM
neoprene stainless bonded washer

EDPM NEOPRENE BONDED WASHERS

  • STAINLESS STEEL
PART # SIZE OUTSIDE DIAMETER PART# SIZE OUTSIDE DIAM.
812SW 8 x 1/2″ 12MM 1058SW 10 x 5/8″ 16MM
891SW 8 x 9/16″ 14MM 1291SW 12 x 9/16″ 14MM
858SW 8 x 5/8″ 16MM 1258SW 12 x 5/8″ 16MM
1012SW 10 x 1/2″ 12MM 1491SW 14 x 9/16″ 14MM
1091SW 10 x 9/16″ 14MM 1458SW 14 x 5/8″ 16MM
neoprene bonded copper washer

EDPM NEOPRENE BONDED WASHERS

  • COPPER
PART # SIZE
CU-NW1009 10 X 1/2″
fender washer

FENDER WASHERS

  • ZINC PLATED
PART # SIZE INSIDE
DIAMETER
OUTSIDE
DIAMETER
THICKNESS GAUGE
(INCHES)
APPROX. PIECES
PER LB
CASE
QUANTITIES
7810001 1/8″ x 3/4″ 5/32″ 3/4″ .051/.067 50 LBS
7810002 1/8″ x 1″ 5/32″ 1″ .051/.067 61.34 50 LBS
7810003 3/16″ x 1″ 7/32″ 1″ .051/.067 83 50 LBS
7810004 3/16″ x 1-1/4″ 7/32″ 1-1/4″ .051/.067 50.5 50 LBS
7810005 1/4″ x 1″ 9/32″ 1″ .051/.067 81.96 50 LBS
7810006 1/4″ x 1-1/4″ 9/32″ 1-1/4″ .051/.067 50.5 50 LBS
7810007 1/4″ x 1-1/2″ 9/32″ 1-1/2″ .051/.067 34.48 50 LBS
7810008 1/4″ x 2″ 9/32″ 2″ .051/.067 46.51 50 LBS
7810009 5/16″ x 1-1/4″ 11/32″ 1-1/4″ .051/.067 54.64 50 LBS
7810010 3/8″ x 1-1/4″ 13/32″ 1-1/4″ .051/.067 50 LBS
7810011 3/8″ x 1-1/2″ 13/32″ 1-1/2″ .051/.067 33.67 50 LBS
7810012 1/2″ x 1-1/2″ 17/32″ 1-1/2″ .051/.067 19.5 50 LBS
uss flat washer

SAE-FLAT WASHERS

  • ZINC PLATED
PART # SIZE INSIDE
DIAMETER
OUTSIDE
DIAMETER
THICKNESS GAUGE
(INCHES)
APPROX. PIECES
PER LB
CASE
QUANTITIES
7800501 #6 5/32″ 3/8″ #18 (3/64) 790 50 LBS
7800502 #8 3/16″ 7/16″ #18 (3/64) 585 50 LBS
7800503 #10 7/32″ 1/2″ #18 (3/64) 435 50 LBS
7800510 1/4″ 9/32″ 5/8″ #16 (1/16) 222 50 LBS
7800511 5/16″ 11/32″ 11/16″ #16 (1/16) 192 50 LBS
sae flat washer

USS-FLAT WASHERS

  • ZINC PLATED
PART # SIZE INSIDE
DIAMETER
OUTSIDE
DIAMETER
THICKNESS GAUGE
(INCHES)
APPROX PIECES
PER LB
CASE
QUANTITIES
7806005 3/16″ 1/4″ 9/16″ #18 (3/64) 362 50 LBS
7806010 1/4″ 5/16″ 3/4″ #16 (1/16) 149 50 LBS
7806015 5/16″ 3/8″ 7/8″ #14 (5/64) 90 50 LBS
7806020 3/8″ 7/16″ 1″ #14 (5/64) 67 50 LBS
7806025 7/16″ 1/2″ 1-1/4″ #14 (5/64) 41 50 LBS
7806030 1/2″ 9/16″ 1-3/8″ #12 (7/64) 26 50 LBS
7806035 5/8″ 11/16″ 1-3/4″ #10 (9/64) 13 50 LBS
7806040 3/4″ 13/16″ 2″ #9 (5/32) 9.1 50 LBS
medium split lock washer

MEDIUM SPLIT LOCK WASHERS

  • ZINC PLATED
PART # SIZE CASE QUANTITIES
SLW101 1/4″ 100, 1000
SLW102 5/16″ 100, 1000
SLW103 3/8″ 100, 1000
SLW104 1/2″ 100, 1000

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