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Japan standard JIS B1183 Domed cap nuts Type 1 Type 2 Type3 for 4T 5T 6T carbon steel ZP YZP zinc nickel alloys 304 316

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Japan standard JIS B1183 Domed cap nuts Type 1 Type 2 Type3 for 4T 5T 6T carbon steel ZP YZP zinc nickel alloys 304 316

Country/Region	china
City & Province	jiaxing zhejiang
Categories	Nuts

Product Details

Specification

Scope:

This Japanese Industrial Standard specifies the steel domed cap nuts (hereafter referred to as "steel nuts"), the stainless steel domed cap nuts (hereafter referred to as "stainless steel nuts"), and the copper alloy domed cap nuts (hereafter referred to as "copper alloy nuts"), all for general use for the characteristic.

Made from 304 stainless steel, these cap nuts have good chemical resistance and may be mildly magnetic. Also known as acorn nuts, these nuts have a smooth rounded head that covers and protects threads while providing a finished appearance

Made from 316 stainless steel, these nuts have excellent resistance to chemicals and salt water. Also known as acorn nuts, these nuts have a smooth rounded head that covers and protects threads while providing a finished appearance. They may be mildly magnetic.

Often referred to as acorn nuts, these nuts have a smooth rounded head that covers and protects threads while providing a finished appearance. About half the strength of medium-strength steel cap nuts, use them in light duty fastening applications, such as securing access panels.
Zinc-plated steel cap nuts resist corrosion in wet environments.
Chrome-plated steel cap nuts have excellent resistance to chemicals and salt water and have a decorative metallic finish.

Often referred to as acorn nuts, these nuts have a smooth rounded head that covers and protects threads while providing a finished appearance. They're about 25% stronger than medium-strength steel cap nuts and comparable in strength to Class 10.9 bolts. A zinc plating provides corrosion resistance in wet environments.

JIS B1183- Hexagon domed cap nuts

Screw Thread
d

M10

M12

(M14)

M16

(M18)

P	Pitch	Coarse thread
P	Pitch	Fine thread
m₂	Nominal Size
	max
	min
m	max
m	min
s	max
s	min
b	Nominal Size
A	min
t₂	min
e	≈
d_w	≈
R	≈
r	≈

0.7	0.8	1	1.25	1.5	1.75	2	2	2.5
-	-	-	1	1.25	1.25	1.5	1.5	1.5
6.2	7.5	9.5	12.5	15.5	18.5	21	24	27
6.45	7.75	9.75	12.8	15.8	18.8	21.3	24.4	27.4
5.95	7.25	9.25	12.2	15.2	18.2	20.7	23.6	26.6
3.2	4	5	6.5	8	10	11	13	15
2.9	3.7	4.7	6.14	7.64	9.64	10.57	12.57	14.57
7	8	10	13	17	19	22	24	27
6.8	7.8	9.8	12.75	16.75	18.65	21.65	23.65	26.65
3.2	4	5	6.5	8	10	11	13	15
5.6	6.6	8.5	11.5	14.5	16.5	19.5	21.5	23.5
0.6	0.6	0.6	0.8	1	1.2	1.6	1.6	1.6
8.1	9.2	11.5	15	19.6	21.9	25.4	27.7	31.2
6.8	7.8	9.8	12.5	16.5	18	21	23	26
3	3.5	4.5	6.5	7.5	8	10	11	12
0.5	0.5	0.5	0.5	0.5	1	1	1	1

Screw Thread
d

M20

(M22)

M24

(M27)

M30

(M33)

M36

(M39)

P	Pitch	Coarse thread
P	Pitch	Fine thread
m₂	Nominal Size
	max
	min
m	max
m	min
s	max
s	min
b	Nominal Size
A	min
t₂	min
e	≈
d_w	≈
R	≈
r	≈

2.5	2.5	3	3	3.5	3.5	4	4
1.5	1.5	2	2	2	2	3	3
29	32.5	35.5	41	45	49	54.5	59
29.4	32.9	35.9	41.5	45.5	49.5	55	59.5
28.6	32.1	35.1	40.5	44.5	48.5	54	58.5
16	18	19	22	24	26	29	31
15.57	17.57	18.48	21.48	23.48	25.48	28.48	30.38
30	32	36	41	46	50	55	60
29.65	31.6	35.6	40.6	45.6	49.6	54.55	59.55
16	18	19	22	24	26	29	31
26.5	28.5	32.5	37.5	41.5	45.5	50.5	55.5
1.6	2	2	2	2	2	2	2
34.6	37	41.6	47.3	53.1	57.7	63.5	69.3
29	31	34	39	44	48	53	57
13.5	14.5	16.5	19	21	23	25.5	28
1	1	1	1.5	1.5	1.5	1.5	1.5

①,Type 1 is that the hexagonal part and the cap part are integrated and no undercut is provided, type 2 is that the hexagonal part and the cap part are integrated and an undercut is provided, and type 3 is that the hexagonal part and the cap part are welded together.

Materials and Chemical compstition

Carbon steel

1008

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Al
0.06	0.06	0.33	0.013	0.003	0.01	0	0.01	0.028

1035

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.34	0.13	0.73	0.012	0.002	0.02	0.01	0.02

10B21

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	B
0.2	0.04	0.81	0.017	0.007	0.017	0.0021

1045

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.45	0.23	0.58	0.014	0.006	0.057	0.008	0.016

40CR

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu
0.4	0.21	0.54	0.015	0.008	0.95	0.02	0.02

35CRMO

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Mo
0.35	0.22	0.59	0.01	0.003	0.93	0.01	0.01	0.21

42CRMO

CHEMICAL COMPOSI %
C	Si	Mn	P	S	Cr	Ni	Cu	Mo
0.42	0.27	0.92	0.013	0.004	1.01	0.03	0.04	0.2

Stainless steel

CHEMICAL COMPOSI(% )
Type	C	Si	Mn	P	S	Ni	Cr	Mo	Cu
Type	≤	≤	≤	≤	≤	≥	≥	≥	≈
201Cu	0.08	1.00	7.5-10	0.06	0.03	4.00-6.00	14.0-17.0		2.0-3.0
201	0.15	1.00	8.50	0.06	0.03	3.50-5.50	16.0-18.0
202	0.15	1.00	7.5-10	0.06	0.03	4.00-6.00	17.0-19.0
301	0.15	1.00	2.00	0.045	0.03	5.00-8.00	16.0-18.0
302	0.15	1.00	2.00	0.045	0.03	8.00-10.0	17.0-19.0
XM7 (302HQ)	0.08	1.00	2.00	0.045	0.03	8.50-10.5	17.0-9.00		3.0-4.0
303	0.15	1.00	2.00	0.20	≥0.15	8.00-10.0	17.0-19.0	≤0.60
304	0.07	1.00	2.00	0.035	0.03	8.00-10.0	18.0-20.0
304HC	0.08	1.00	2.00	0.045	0.03	8.00-10.0	17.0-19.0		1.0-3.0
304M	0.08	1.00	2.00	0.045	0.03	8.50-10.0	18.0-20.0
316	0.08	1.00	2.00	0.045	0.03	10.0-14.0	16.0-18.0	2.0-3.0
316L (12Ni)	0.03	1.00	2.00	0.045	0.03	12.0-15.0	16.0-18.0	2.0-3.0
316L (10Ni)	0.03	1.00	2.00	0.045	0.03	10.0-14.0	16.0-18.0	2.0-3.0
321	0.08	1.00	2.00	0.045	0.03	9.00-13.0	17.0-19.0		Ti≤5*C%
2520	0.08	1.00	2.00	0.035	0.03	19.0-22.0	24.0-26.0

Carbon steel surface

PLAIN ZP YZP BLACK HDG DACROMET GEOMET CHROME NICKEL AND SO ON

PACKING

QBH BULK

20-25KG/CTN,36CTNS/PALLET

20-30KG/BAGS,36BAGS/PALLET

ONE TON/BOXES

50KG/ IRON DRUM,12 IRON DRUMS/PALLET

QBH SMALL PACKING

Packing in small boxes according to customer’s requirements

Packing in plastic bag according to customer’s requirements

QBH PALLET TYPE

SOLID WOOD FUMIGATION PALLET

EURO Pallet

THREE SPLINT PALLET

WOODEN BOX

MECHANICAL PROPERTY

Mechanical properties	Testing method
Proof load stress	Conform to 8.1 of JIS B 1052-2
Hardness	Conform to JIS Z 2243,JIS Z 2244 or JIS Z 2245

The advantages of QBH

QBH brand sales to the main quality assurance.
Years of export trade management, excellent service, word-of-mouth guarantee.
By working with TUV,escort for quality.
Customization of non-standard parts can be made according to customer's requirements and drawings.
For quality customers,we can provide a certain credit period.

Product Description

The Acorn Center Lock nut machined from bar or if volumes and size allow, can be cold formed. Acorn locknuts are produced by installing 2 deflections in opposite flats precisely in the center the nut hex. Low Profile Acorn locknuts are not required to meet the thread start or torque requirements of Full Hex Center locknuts.

Applications

The Acorn locknut is used for either decorative purposes and/or to protect from scratches when surfaces would otherwise encounter exposed screw threads. Acorn Center locknuts are typically found in furniture, medical and recreational vehicle assemblies. Mating parts must extend at least one thread past the locking element to assure locking element engagement.