Plastic washers / rectangular / POM / MC Nylon

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Back to the Category Plastic Washers/Plastic Sleeves

Technical Drawing - Plastic Washers

Square Resin Washers/POM/MC Nylon:Related Image

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Available dimensions and tolerances can be found under the tab More information.

Basic Properties (e.g., material, hardness, coating, tolerance) - Plastic Washers

One Through Hole	Two Through Holes	Two Countersunk Holes	Two Counterbored Holes	Material	Color
WSRJJ	WSRRJ	WSRPJ	WSRZJ	Polyacetal	White
WSRJM	WSRRM	WSRPM	WSRZM	MC Nylon Standard Grade	Blue

Material Properties >> P.141

Further specifications can be found under the tab More information.

Composition of a Product Code - Plastic Washers

Part Number	-	B	-	P
WSRJJ10	-	25	-	12.5

Alterations - Plastic Washers

General Information - Plastic Washers

Selection details of plastic washers/plastic sleeves

- Material: MC-nylon, polyacetal (POM), Bakelit, epoxy glass, polyether ether ketone (PEEK), fluoroplastic, polyslider, ceramic, polycarbonate (PC), polyamide (PA), polytetrafluoroethylene (PTFE), Duracon, Duranex, ABS, glass (lime-sodium glass)

- Outer diameter: 2 to 100 mm

- Inner diameter: 1 to 90 mm

- Thickness, length: 0.1 to 500 mm

- Forms: cylindrical, with collar, with pins, with countersunk bore, with guide, square washers

Description/Basics of plastic washers/plastic sleeves

Sleeves in general, are among the most commonly used machine elements to create a distance between two components. Plastic sleeves and ceramic sleeves offer added value compared to conventional metal collars.

Plastic sleeves and plastic sleeves with a collar have some advantages over their metallic counterparts. In addition to creating and maintaining a distance, they also have an insulating effect. The insulation effect refers to thermal insulation or electrical insulation depending on the material. In addition, their similarity to natural materials is greater than with metal sleeves. As a result, plastic washers and plastic sleeves (depending on the material) expand to the same extent under the influence of heat, such as wood or similar soft materials.

Plastic washers, as well as washers, enable an increase in surface compression. However, their resistance to pressure loads is lower depending on the material selected than that of a similarly large metal washer. For this purpose, the advantage of thermal and electrical insulation effects exists in plastic washers.

MISUMI also offers plastic washers and plastic sleeves with gliding properties. For example, washers and sleeves made of fluoroplastics are suitable for reducing friction resistances in hinge constructions. It should be noted that plastic sleeves do not replace plain bearings.

Polyether ether ketone (PEEK) has excellent thermal insulating properties. Depending on the strength and material composition, PEEK has a melting point of up to 300°C. It is therefore suitable, among other things, for insulating heating and cooling lines, for example. Due to the quality of the surface, the material has particularly good adhesive properties.

Polyacetal, also called POM, is characterized by its very good machinability and excellent mechanical properties. Polyacetal (POM) products are widely used in various branches of mechanical engineering.

At MISUMI you will find washers and sleeves made of various variants of MC Nylon. In addition to the standard version, a conductive and antistatic type is also offered. Thus, MC Nylon can be used in a wide variety of applications.

The different versions and shapes of the plastic washers and plastic sleeves allow utilising them in a wide variety of applications. Thus, plastic washers can be used, for example, as bearing mountings up to the assembly of printed circuit boards.

Application Examples

Plastic sleeve as thermally insulating spacer sleeve
(1) Plastic sleeves, (2) Cylindrical plastic sleeve, (3) Plastic washer, (4) Hexagon socket screws, (5) Washer, (6) Hexagon nut

Plastic sleeve as bearing ring
(1) Plastic sleeve with guide, (2) Rotary shaft, (3) Timing pulley, (4) Ball bearing (5) Bearing with housing, (6) Drive wheel

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Part Number
WSRJM6-[6-20/1]-[3-10/0.5]
WSRJM8-[8-25/1]-[4-12.5/0.5]
WSRJM10-[10-30/1]-[5-15/0.5]
WSRJM12-[12-35/1]-[6-17.5/0.5]
WSRJM15-[15-45/1]-[7.5-22.5/0.5]
WSRJM20-[20-60/1]-[10-30/0.5]
WSRJM25-[25-75/1]-[12.5-37.5/0.5]
WSRPM10-[20-40/1]-[10-30/0.5]
WSRPM12-[24-48/1]-[12-36/0.5]
WSRPM15-[30-60/1]-[15-45/0.5]
WSRPM20-[40-80/1]-[20-60/0.5]
WSRPM25-[50-100/1]-[25-75/0.5]
WSRRM6-[12-24/1]-[6-18/0.5]
WSRRM8-[16-32/1]-[8-24/0.5]
WSRRM10-[20-40/1]-[10-30/0.5]
WSRRM12-[24-48/1]-[12-36/0.5]
WSRRM15-[30-60/1]-[15-45/0.5]
WSRRM20-[40-80/1]-[20-60/0.5]
WSRRM25-[50-100/1]-[25-75/0.5]
WSRZM10-[20-40/1]-[10-30/0.5]
WSRZM12-[24-48/1]-[12-36/0.5]
WSRZM15-[30-60/1]-[15-45/0.5]
WSRZM20-[40-80/1]-[20-60/0.5]
WSRZM25-[50-100/1]-[25-75/0.5]

Minimum order quantity	Standard Shipping Days ?	RoHS	Material	Material Detail	Hole Type	Width A (mm)	B (mm)	P (mm)
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	6	6 ～ 20	3 ～ 10
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	8	8 ～ 25	4 ～ 12.5
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	10	10 ～ 30	5 ～ 15
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	12	12 ～ 35	6 ～ 17.5
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	15	15 ～ 45	7.5 ～ 22.5
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	20	20 ～ 60	10 ～ 30
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	25	25 ～ 75	12.5 ～ 37.5
1	6 Days	10	MC Nylon	MC Nylon	Countersunk Holes	10	20 ～ 40	10 ～ 30
1	6 Days	10	MC Nylon	MC Nylon	Countersunk Holes	12	24 ～ 48	12 ～ 36
1	6 Days	10	MC Nylon	MC Nylon	Countersunk Holes	15	30 ～ 60	15 ～ 45
1	6 Days	10	MC Nylon	MC Nylon	Countersunk Holes	20	40 ～ 80	20 ～ 60
1	6 Days	10	MC Nylon	MC Nylon	Countersunk Holes	25	50 ～ 100	25 ～ 75
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	6	12 ～ 24	6 ～ 18
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	8	16 ～ 32	8 ～ 24
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	10	20 ～ 40	10 ～ 30
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	12	24 ～ 48	12 ～ 36
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	15	30 ～ 60	15 ～ 45
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	20	40 ～ 80	20 ～ 60
1	6 Days	10	MC Nylon	MC Nylon	Through Hole	25	50 ～ 100	25 ～ 75
1	6 Days	10	MC Nylon	MC Nylon	Counterbored Hole	10	20 ～ 40	10 ～ 30
1	6 Days	10	MC Nylon	MC Nylon	Counterbored Hole	12	24 ～ 48	12 ～ 36
1	6 Days	10	MC Nylon	MC Nylon	Counterbored Hole	15	30 ～ 60	15 ～ 45
1	6 Days	10	MC Nylon	MC Nylon	Counterbored Hole	20	40 ～ 80	20 ～ 60
1	6 Days	10	MC Nylon	MC Nylon	Counterbored Hole	25	50 ～ 100	25 ～ 75

Back to the Category Plastic Washers/Plastic Sleeves

Technical Drawing - Plastic Washers

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Specification Tables - Plastic Washers

■One Through Hole

Part Number		B 1mm Increment	P 0.5mm Increment (P≤B/2)	T	Screw Nominal Dia.	d	Unit Price
Type	A	B 1mm Increment	P 0.5mm Increment (P≤B/2)	T	Screw Nominal Dia.	d	WSRJJ	WSRJM
WSRJJ WSRJM	6	6~20	3.0~10.0	2	3	3.5
	8	8~25	4.0~12.5	3	3	3.5
	10	10~30	5.0~15.0	4	4	4.5
	12	12~35	6.0~17.5	5	4	4.5
	15	15~45	7.5~22.5	6	5	5.5
	20	20~60	10.0~30.0	8	6	6.5
	25	25~75	12.5~37.5	10	8	9

■Two Through Holes

Part Number		B 1mm Increment	P 0.5mm Increment (P≤B-2P₁)	T	Screw Nominal Dia.	d	P₁	Unit Price
Type	A	B 1mm Increment	P 0.5mm Increment (P≤B-2P₁)	T	Screw Nominal Dia.	d	P₁	WSRRJ	WSRRM
WSRRJ WSRRM	6	12~24	6.0~18.0	2	3	3.5	3
	8	16~32	8.0~24.0	3	3	3.5	4
	10	20~40	10.0~30.0	4	4	4.5	5
	12	24~48	12.0~36.0	5	4	4.5	6
	15	30~60	15.0~45.0	6	5	5.5	7.5
	20	40~80	20.0~60.0	8	6	6.5	10
	25	50~100	25.0~75.0	10	8	9	12.5

■Two Countersunk Holes

Part Number		B 1mm Increment	P 0.5mm Increment (P≤B-2P₁)	T	Screw Nominal Dia.	d	d₁	h	P₁	Unit Price
Type	A	B 1mm Increment	P 0.5mm Increment (P≤B-2P₁)	T	Screw Nominal Dia.	d	d₁	h	P₁	WSRPJ	WSRPM
WSRPJ WSRPM	10	20~40	10.0~30.0	3	3	3.5	7.5	2	5
	12	24~48	12.0~36.0	4	4	4.5	9.5	2.5	6
	15	30~60	15.0~45.0	4	5	5.5	11.5	3	7.5
	20	40~80	20.0~60.0	5	6	6.5	13.5	3.5	10
	25	50~100	25.0~75.0	6	8	9	19	5	12.5

■Two Counterbored Holes

Part Number		B 1mm Increment	P 0.5mm Increment (P≤B-2P₁)	T	Screw Nominal Dia.	d	d₁	h	P₁	Unit Price
Type	A	B 1mm Increment	P 0.5mm Increment (P≤B-2P₁)	T	Screw Nominal Dia.	d	d₁	h	P₁	WSRZJ	WSRZM
WSRZJ WSRZM	10	20~40	10.0~30.0	6	3	3.5	6.5	4	5
	12	24~48	12.0~36.0	8	4	4.5	8	5	6
	15	30~60	15.0~45.0	8	5	5.5	9.5	6	7.5
	20	40~80	20.0~60.0	10	6	6.5	11	7	10
	25	50~100	25.0~75.0	12	8	9	14	9	12.5

Alterations - Plastic Washers

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Basic Attributes

Material Detail
MC Nylon

Polyacetal
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Hole Type
- Counterbored Hole
- Countersunk Holes
- Through Hole
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Width A(mm)
- 6
- 8
- 10
- 12
- 15
- 20
- 25
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B(mm)
[6-100/1mm Unit(s)]
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P(mm)
[3-75/0.5mm Unit(s)]
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Type
- WSRJJ
- WSRJM
- WSRPJ
- WSRPM
- WSRRJ
- WSRRM
- WSRZJ
- WSRZM
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Material
- MC Nylon
- Polyacetal
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Optional Attributes

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Frequently Asked Questions (FAQ)

Question:
Do ceramic washers have the same strength as ceramic sleeves?: Answer:
Due to a radial lamination of the ceramic material, ceramic sleeves have a lower compressive strength than ceramic washers (vertically laminated). Detailed information and comparison values can be found here.
Question:
What is the thermal expansion of plastic sleeves and plastic washers?: Answer:
Plastic sleeves and plastic washers react sensitively to fluctuations in ambient temperature. The length of synthetic resin sleeves varies depending in a ratio of up to 1°C = 0.1 mm depending on the temperature . Details on the thermal expansion of other materials available at MISUMI can be found in this PDF.
Question:
Do you have washers made of a material that provide electric insulation?: Answer:
Most plastics have an electrically insulating effect. The level of insulation differs depending on the material. Polycarbonate has a very good electrically insulating effect. In addition to its good electrical insulating effect, it is also superior to most conventional plastics in terms of mechanical aspects.
Question:
Which material is suitable for both low and high temperatures?: Answer:
Polyether ether ketone (PEEK) and polytetrafluoroethylene (PTFE) have an operating temperature of approx. -50°C (PEEK), respectively -40°C (PTFE) and up to +250°C.