Home> Products> JIS B 1251 spring washer

304 stainless steel JIS B 1251 Spring washer M20

Product brief description:

Durable and sturdy

No rust when exposed to water

Standard size

Environmentally friendly and aesthetically pleasing

Complete variety

Wide adaptability

Quality assurance

Material diversity (stainless steel, spring steel, copper, aluminum, alloy steel, etc)

Product specifics:

Stainless steel JIS B 1251 spring washer is widely used in mechanical railway industrial products, auto parts, power products, solar products, ships, building decoration engineering, bridges, furniture, home appliances, and other fields.

Product parameter table:

JIS B 1251 (SW/No.2) – 2018:

Nominal Diameter d		Φ2	Φ2.5	Φ3	(Φ3.5)	Φ4	(Φ4.5)	Φ5	Φ6	(Φ7)	Φ8	Φ10	Φ12
d	min=nominal size	2.1	2.6	3.1	3.6	4.1	4.6	5.1	6.1	7.1	8.2	10.2	12.2
d	max	2.35	2.9	3.4	3.9	4.5	5	5.5	6.5	7.5	8.7	10.7	12.8
n	min	0.9	1	1.1	1.2	1.4	1.5	1.7	2.7	2.8	3.2	3.7	4.2
h	min	0.5	0.6	0.7	0.8	1	1.2	1.3	1.5	1.6	2	2.5	3
dc	max	4.4	5.2	5.9	6.6	7.6	8.3	9.2	12.2	13.4	15.4	18.4	21.5
H	(≈2h)	1	1.2	1.4	1.6	2	2.4	2.6	3	3.2	4	5	6

Nominal Diameter d		(Φ14)	Φ16	(Φ18)	Φ20	(Φ22)	Φ24	(Φ27)	Φ30	(Φ33)	Φ36	(Φ39)
d	min=nominal size	14.2	16.2	18.2	20.2	22.5	24.5	27.5	30.5	33.5	36.5	39.5
d	max	14.8	17	19	21	23.5	25.5	28.7	31.7	34.9	37.9	40.9
n	min	4.7	5.2	5.7	6.1	6.8	7.1	7.9	8.7	9.5	10.2	10.7
h	min	3.5	4	4.6	5.1	5.6	5.9	6.8	7.5	8.2	9	9.5
dc	max	24.5	28	31	33.8	37.7	40.3	45.3	49.9	54.7	59.1	63.1
H	(≈2h)	7	8	9.2	10.2	11.2	11.8	13.6	15	16.4	18	19

JIS B 1251 (SW/No.3) – 2018:

Nominal Diameter d		Φ6	(Φ7)	Φ8	Φ10	Φ12	(Φ14)	Φ16	(Φ18)	Φ20	(Φ22)	Φ24	(Φ27)
d	min=nominal size	6.1	7.1	8.2	10.2	12.2	14.2	16.2	18.2	20.2	22.5	24.5	27.5
d	max	6.5	7.5	8.7	10.7	12.8	14.8	17	19	21	23.5	25.5	28.7
n	min	2.7	2.8	3.3	3.9	4.4	4.8	5.3	5.9	6.4	7.1	7.6	8.6
h	min	1.9	2	2.5	3	3.6	4.2	4.8	5.4	6	6.8	7.2	8.3
dc	max	12.2	13.4	15.6	18.8	21.9	24.7	28.2	31.4	34.4	38.3	41.3	46.7
H	(≈2h)	3.8	4	5	6	7.2	8.4	9.6	10.8	12	13.6	14.4	16.6