OEM/ODM Factory Helical Spring Washer - DIN 125 Flat washer carbon steel zinc plated – Tianbang Fasteners

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OEM/ODM Factory Helical Spring Washer - DIN 125 Flat washer carbon steel zinc plated – Tianbang Fasteners Detail:

Specification

Item	Flat washer; Plain washer
Main products	DIN125 DIN9021
Size	M4-M64
Key words	Flat round washer
Material	Carbon steel: Q195, Q235, 1035, 1045, 65Mn
Grade	4.8,8.8,10.9,12.9
Standard	GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS etc
Non-standards	OEM is available, according to drawing or samples
Finish	Plain, Zinc Plated(Clear/Blue/Yellow/Black), black , HDG, Dacromet
Certification	ISO9001,SGS
Package	5kg 10kg 25kg bag/ carton+pallet or customized.
Application	Heavy Industry, Retail Industry, General Industry, Automotive

hex bolt5

Size	M	d		dc		h
Size	For thread size	min	max	min	max	min	max
φ3.2	M3	3.2	3.38	6.64	7	0.45	0.55
φ3.7	M3.5	3.7	3.88	7.64	8	0.45	0.55
φ4.2	M4	4.3	4.48	8.64	9	0.7	0.9
φ5.3	M5	5.3	5.48	9.64	10	0.9	1.1
φ6.4	M6	6.4	6.62	11.57	12	1.4	1.8
φ7.4	M7	7.4	7.64	13.57	14	1.4	1.8
φ8.4	M8	8.4	8.64	15.57	16	1.4	1.8
φ10.5	M10	10.5	10.77	19.48	20	1.8	2.2
φ13	M12	13	13.27	23.48	24	2.3	2.7
φ15	M14	15	15.27	27.48	28	2.3	2.7
φ17	M16	17	17.27	29.48	30	2.7	3.3
φ19	M18	19	19.33	33.38	34	2.7	3.3
φ21	M20	21	21.33	36.38	37	2.7	3.3
φ23	M22	23	23.33	38.38	39	2.7	3.3
φ25	M24	25	25.33	43.38	44	3.7	4.3
φ27	M26	27	27.33	49.38	50	3.7	4.3
φ28	M27	28	28.33	49.38	50	3.7	4.3
φ29	M28	29	29.33	49.38	50	3.7	4.3
φ31	M30	31	31.39	55.26	56	3.7	4.3
φ33	M32	33	33.62	58.8	60	4.4	5.6
φ34	M33	34	34.62	58.8	60	4.4	5.6
φ36	M35	36	36.62	64.8	66	4.4	5.6
φ37	M36	37	37.62	64.8	66	4.4	5.6
φ39	M38	39	39.62	70.8	72	5.4	6.6
φ40	M39	40	40.62	70.8	72	5.4	6.6
φ41	M40	41	41.62	70.8	72	5.4	6.6
φ43	M41	43	43.62	76.8	78	6	8
φ46	M45	46	46.62	83.6	85	6	8
φ50	M48	50	50.62	90.6	92	7	9
φ52	M50	52	52.74	90.6	92	7	9
φ54	M52	54	54.74	96.6	98	7	9
φ57	M55	57	57.74	103.6	105	8	10
φ58	M56	58	58.74	103.6	105	8	10
φ60	M58	60	60.74	108.6	110	8	10
φ62	M60	62	62.74	108.6	110	8	10
φ66	M64	66	66.74	113.6	115	8	10
φ70	M68	70	70.74	118.6	120	9	11
φ74	M72	74	74.74	123.4	125	9	11

hex bolt5

More instructions about the flat washer

(1)What are flat washers for?
Flat washers prevent sinking of bearing surfaces,The main role of flat washers is to increase the size of a screw’s bearing surface area, and reduce the surface pressure applied on the fastened object.

(2)What is the difference between a flat washer and a fender washer?
A fender washer, though similar in shape to a standard washer, differs in that the outside diameter is traditionally much larger in proportion to the center hole. With this design, a fender washer can be placed under the head of a bolt or nut to help distribute forces applied when tightening.

(3)Do I need a flat washer with a lock washer?
Flat washers are used to increase the surface area in order to more evenly distribute the force applied with tightening the fastener. Lock washers are used as a means of creating tension during tightening in order to help keep the nut from working loose later.

(4)What goes first lock washer or flat washer?
When used correctly, a lock washer will hold the nut or other threaded fastener in place. To help it accomplish this, put the lock washer on first, below the fastener. If your project calls for other washers or hardware elements, they should go on before the lock washer so that it can hold them in place.

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