AYA FASTENERS Guide | Why Use Black Zinc Bolts?

Black Zinc Bolts are used in a variety of applications. The black Zinc layer provides corrosion resistance but in a mild way. In addition, the black finish is thicker than the usual black oxide finish. Users who require a trendy finish and mild corrosion protection can opt for black Zinc Bolts.

 

The zinc-plated bolts have a decorative black finish, making them look attractive when the task is done.

 

The black zinc bolts are ideal for spaces exposed to high heat or extreme temperatures. Corrosion is perhaps the most dreaded condition for most industries. With black Zinc bolts, one can expect a satisfactory level of protection from corrosion.

 

The black zinc plating process involves an electrolytic application of zinc to the preferred metal. Then, the manufacturer immerses the bolt in a zinc plating bath and applies an electric current.

 

The black zinc coating works as a shield or a barrier to protect the bolt from all kinds of damages, such as wear and tear and corrosion, enhancing the overall appearance.

 

Black Zinc Bolts offer many advantages, which makes them a popular pick among different industries. These are convenient to use and do not have any build-up too.

 

With black zinc bolts, you can expect protection from corrosion and an attractive external appearanc.

 

             

Screw Thread				M8	M10	M12	(M14)	M16	(M18)	M20	(M22)	M24	(M27)	M30	(M33)	M36	(M39)
d
P		Pitch	Fine thread-1	1	1	1.5	1.5	1.5	2	1.5	2	2	2	2	2	3	3
			Fine thread-2	-	1.25	1.25	-	-	1.5	2	1.5	1.5	-	-	-	-	-
b		L≤125		22	26	30	34	38	42	46	50	54	60	66	72	78	84
		125＜L≤200		28	32	36	40	44	48	52	56	60	66	72	78	84	90
		L＞200		41	45	49	53	57	61	65	69	73	79	85	91	97	103
c		min		0.15	0.15	0.15	0.15	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.3
		max		0.6	0.6	0.6	0.6	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	0.8	1
da		max		9.2	11.2	13.7	15.7	17.7	20.2	22.4	24.4	26.4	30.4	33.4	36.4	39.4	42.4
ds		max		8	10	12	14	16	18	20	22	24	27	30	33	36	39
		Grade A	min	7.78	9.78	11.73	13.73	15.73	17.73	19.67	21.67	23.67	-	-	-	-	-
		Grade B	min	7.64	9.64	11.57	13.57	15.57	17.57	19.48	21.48	23.48	26.48	29.48	32.38	35.38	38.38
dw		Grade A	min	11.6	15.6	17.4	20.5	22.5	25.3	28.2	30	33.6	-	-	-	-	-
		Grade B	min	11.4	15.4	17.2	20.1	22	24.8	27.7	29.5	33.2	38	42.7	46.6	51.1	55.9
e		Grade A	min	14.38	18.9	21.1	24.49	26.75	30.14	33.53	35.72	39.98	-	-	-	-	-
		Grade B	min	14.2	18.72	20.88	23.91	26.17	29.56	32.95	35.03	39.55	45.2	50.85	55.37	60.79	66.44
k		Nominal Size		5.3	6.4	7.5	8.8	10	11.5	12.5	14	15	17	18.7	21	22.5	25
		Grade A	min	5.15	6.22	7.32	8.62	9.82	11.28	12.28	13.78	14.78	-	-	-	-	-
			max	5.45	6.58	7.68	8.98	10.18	11.72	12.72	14.22	15.22	-	-	-	-	-
		Grade B	min	5.06	6.11	7.21	8.51	9.71	11.15	12.15	13.65	14.65	16.65	18.28	20.58	22.08	24.58
			max	5.54	6.69	7.79	9.09	10.29	11.85	12.85	14.35	15.35	17.35	19.12	21.42	22.92	25.42
k1		min		3.54	4.28	5.05	5.96	6.8	7.8	8.5	9.6	10.3	11.7	12.8	14.4	15.5	17.2
r		min		0.4	0.4	0.6	0.6	0.6	0.6	0.8	0.8	0.8	1	1	1	1	1
s		max=nominal size		13	17	19	22	24	27	30	32	36	41	46	50	55	60
		Grade A	min	12.73	16.73	18.67	21.67	23.67	26.67	29.67	31.61	35.38	-	-	-	-	-
		Grade B	min	12.57	16.57	18.48	21.16	23.16	26.16	29.16	31	35	40	45	49	53.8	58.8

 

 

Screw Thread				M42	(M45)	M48	(M52)	M56	(M60)	M64	(M68)	M72	(M76)	M80	M90	M100
d
P		Pitch	Fine thread-1	3	3	3	3	4	4	4	4	4	4	4	4	4
			Fine thread-2	-	-	-	-	-	-	-	-	-	-	-	-	-
b		L≤125		90	96	102	-	-	-	-	-	-	-	-	-	-
		125＜L≤200		96	102	108	116	124	132	140	148	158	164	172	192	-
		L＞200		109	115	121	129	137	145	153	161	169	177	185	205	225
c		min		0.3	0.3	0.3	0.3	-	-	-	-	-	-	-	-	-
		max		1	1	1	1	1	1	1	1	1	1	2	2	2
da		max		45.6	48.6	52.6	56.6	63	67	71	75	79	83	87	97	108
ds		max		42	45	48	52	56	60	64	68	72	76	80	90	100
		Grade A	min	-	-	-	-	-	-	-	-	-	-	-	-	-
		Grade B	min	41.38	44.38	47.38	51.26	55.26	59.26	63.26	67.26	71.26	75.26	79.26	89.13	99.13
dw		Grade A	min	-	-	-	-	-	-	-	-	-	-	-	-	-
		Grade B	min	59.9	64.7	69.4	74.2	78.7	83.4	88.2	92.9	97.7	102.4	107.2	121.1	135.4
e		Grade A	min	-	-	-	-	-	-	-	-	-	-	-	-	-
		Grade B	min	71.3	76.95	82.6	88.25	93.56	99.21	104.86	110.51	116.16	121.81	127.46	144.08	161.03
k		Nominal Size		26	28	30	33	35	38	40	43	45	48	50	57	63
		Grade A	min	-	-	-	-	-	-	-	-	-	-	-	-	-
			max	-	-	-	-	-	-	-	-	-	-	-	-	-
		Grade B	min	25.58	27.58	29.58	32.5	34.5	37.5	39.5	42.5	44.5	47.5	49.5	56.4	62.4
			max	26.42	28.42	30.42	33.5	35.5	38.5	40.5	43.5	45.5	48.5	50.5	57.6	63.6
k1		min		17.9	19.3	20.9	22.8	24.2	26.2	27.6	29.8	31.2	33.2	34.6	39.5	43.7
r		min		1.2	1.2	1.6	1.6	2	2	2	2	2	2	2	2.5	2.5
s		max=nominal size		65	70	75	80	85	90	95	100	105	110	115	130	145
		Grade A	min	-	-	-	-	-	-	-	-	-	-	-	-	-
		Grade B	min	63.1	68.1	73.1	78.1	82.8	87.8	92.8	97.8	102.8	107.8	112.8	127.5	142.5

 

 

Black Zinc Bolts Advantages

 

Black Zinc plating on the bolts is a popular finish that provides anti-galling properties and corrosion protection. As a result, the playing is applied to parts exposed to high wear and tear, high temperature, and corrosion.

 

With zinc playing, professionals can expect superior protection. But what sets black zinc bolts apart is that they are visually appealing. The finish ranges from iridescent hues to a lovely matte finish.

 

 

The black zinc bolts offer attractiveness, durability, and, most importantly, it provides uniformity.

 

Different industries prefer black zinc bolts over other finishes, especially when the structure demands a durable and anti-corrosive bolt.

 

The most evident advantages of black Zinc plating include the following:

●An attractive surface finish.

●Stress tolerance.

●High-temperature tolerance.

●A beautiful aesthetic appeal.

●Great strength.

●Excellent corrosion protection.

 

Zinc coatings are also economical, and they offer superior ductility and adhesion.

 

 

Black Zinc Bolts Applications

Black Zinc plating on the bolts makes it highly durable. The bolts offer superior corrosion protection and incredible durability in highly stressful environments.

 

The most common applications are furniture fittings, outdoor equipment, electronics, automotive parts, heavy machine parts, etc.

 

Purchasing black zinc bolts can be an excellent decision if the idea is to protect the bolts from corrosion and make the structure look appealing.

 

These bolts are standard zinc-plated bolts with a decorative black coating which increases the tightness of the bolt. The coating on the black zinc bolts is safe and convenient to use, so professionals will not have a hard time handling or using them for different applications.

 

 

 

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