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Steel ANSI HEX JAM NUT THIN NUT B18.2.2 from 1/4 to 2inch Black ZP YZP HDG Grade 2 Grade 5 Grade 8

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Address: No.375,Tongle Road,Jiaxing City,Zhejiang Province,China

Contact name:Lance

Jiaxing City Qunbang Hardware Co., Ltd

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Steel ANSI HEX JAM NUT THIN NUT B18.2.2 from 1/4 to 2inch Black ZP YZP HDG Grade 2 Grade 5 Grade 8

Country/Region	china
City & Province	jiaxing zhejiang
Categories	Nuts

Product Details

Specification

Also known as jam nuts, these are about half the height of standard hex nuts. Use them in low-clearance applications or jam one against another nut to hold it in place. About half the strength of medium-strength steel thin nuts, use them for light duty fastening applications, such as securing access panels.

Zinc-plated steel nuts resist corrosion in wet environments.

Black-oxide steel nuts have a dark surface color and are mildly corrosion resistant in dry environments.

Nominal Size	F			C		H			TYPE
	Width Across Flats			Width Across Corners		Thickness			TYPE
	Basic	Max	Min	Max	Min	Basic	Max	Min	Plain	Galvanized
1⁄2	3⁄4	0.750	0.736	0.866	0.840	5⁄16	0.323	0.302	JAM NUT	JAM NUT
5⁄8	15⁄16	0.938	0.922	1.083	1.051	3⁄8	0.387	0.363	JAM NUT	JAM NUT
3⁄4	11⁄8	1.125	1.088	1.299	1.240	27⁄64	0.446	0.398	JAM NUT	JAM NUT
7⁄8	15⁄16	1.312	1.269	1.516	1.447	31⁄64	0.510	0.458	JAM NUT	JAM NUT
1	11⁄2	1.500	1.450	1.732	1.653	35⁄64	0.575	0.519	JAM NUT	JAM NUT
11⁄8	111⁄16	1.688	1.631	1.949	1.859	39⁄64	0.639	0.579	JAM NUT	JAM NUT
11⁄4	17⁄8	1.875	1.812	2.165	2.066	23⁄32	0.751	0.687	JAM NUT	JAM NUT
13⁄8	21⁄16	2.062	1.994	2.382	2.273	25⁄32	0.815	0.747	JAM NUT	JAM NUT
11⁄2	21⁄4	2.250	2.175	2.598	2.480	27⁄32	0.880	0.808	JAM NUT	JAM NUT
Dimensions per ASME B18.2.2 1987 (1999)

Process flow

Cold forging

Annealing treatment(if need) ➨ wiredrawing ➨ clod forging ➨ tapping ➨make heat treatment(if need) ➨ Finish ➨ Packing

Hot forging

Cutting material ➨ hot forging ➨ turning ➨ tapping ➨ make heat treatment(if need) ➨ Finish ➨ Packing

Product Grade

Grade 2 Grade 5 Grade 8

Materials and Chemical compstition

J995 Chemical Requirements
Grade	Carbon, %	Phosphorus, %	Manganese, %	Sulfur, %
2	0.47 max	0.120 max	-	0.15 max
5	0.55 max	0.050 max	0.30 min	0.15 max
8	0.55 max	0.040 max	0.30 min	0.05 max

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

Finish

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

J995 Mechanical Properties
Grade	Nominal Size, inches	Proofload, UNC and UN 8 Threads, psi	Rockwell Hardness
2	1/4 thru 1-1/2	90,000	C32 Max
5	1/4 thru 1	120,000	C32 Max
5	Over 1 thru 1-1/2	105,000	C32 Max
8	1/4 thru 5/8	150,000	C24-C32
	Over 5/8 thru 1	150,000	C26-C34
	Over 1 thru 1-1/2	150,000	C26-C36
*Values listed are not normally applicable to jam, slotted, castle, heavy or thick nuts.

J995 Tensile Stress Area
Thread, UNC	UNC Stress Area, sq inches	Thread, 8TPI	8 TPI Stress Area, sq inches
1/2-13	0.1419
5/8-11	0.226
3/4-10	0.334
7/8-9	0.462
1-8	0.606	1--8	0.606
1-1/8-7	0.763	1-1/8-8	0.79
1-1/4-7	0.969	1-1/4-8	1
1-3/8-7	1.155	1-3/8-8	1.233
1-1/2-6	1.405	1-1/2-8	1.492
To calculate individual nut proofload value, simply multiply the tensile stress area by the appropriate psi proofload value.

Grade	2	5				8
Size	1/4 to 1-1/2	1/4 to 1	1/4 to 1	1 to 1-1/2	1 to 1-1/2	1/4 to 1-1/2	1/4 to 1-1/2
Thread Series	UNC and 8NU	UNC and 8NU	UNF and 12UN or more fine thread	UNC and 8NU	UNF and 12UN or more fine thread	UNC and 8NU	UNF and 12UN or more fine thread
	PROOF LOAD Unit:psi
HEX NUT	-	120000	109000	105000	94000	150000	150000
HEX FLANGE NUT	-	120000	109000	105000	94000	150000	150000
HEX JAM NUT	-	72000	65000	63000	57000	90000	900000
HEAVY HEX JAM NUT	-	72000	65000	63000	57000	90000	900000
HEX SLOTTED NUT	-	96000	87000	84000	75000	120000	120000
HEAVY HEX NUT	-	133000	120000	116000	105000	165000	150000
HEX THICK NUT	-	133000	120000	116000	105000	165000	150000
HEAVY HEX SLOTTED NUT	-	105000	96000	92000	84000	132000	120000
HEX THICK SLOOTED NUT	-	105000	96000	92000	84000	132000	120000
SQUARE NUT	90000	-	-	-	-	-	-

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 application

Hex jam nuts are thinner than a standard hex nut but have the same dimension across the flats and corners. Hex jam nuts have two common applications. A jam nut can be threaded onto a bolt and run tight against the standard nut which will lock the nut in place and prevent it from backing off. Jam nuts are sometimes used for leveling purposes as well.

Since hot-dip galvanizing typically adds 2.2 to 5 mils of thickness to the threaded portion of a fastener, galvanized hex jam nuts are tapped oversize to compensate for the corrosion resistant coating on the bolts.