Name: stainless steel Hex nuts
SKU: 0





HOME>Stainless Steel Pipe and Fitting>Stainless Steel Nuts

stainless steel Hex nuts

1. Excellent service within 24 hours response
2. High quality with competitive price for sale.
3. Delivery: within 7-15 days or according to quantity
4. Approved by ISO9001, SGS every year
5. Flexible MOQ – 100 pcs trial, volume discounts for bulk.

INTRODUCTION

Name	Stainless Steel nut
Material	304 / 316 / 316L / 2Cr13 / 3Cr13 / 2205 / 2507
Surface	Bright Finish / As-Manufactured / Pickled Finish
Type	Hex nuts / Self-locking / Anti-loosening nuts / Round nuts / Square nuts / Flange nuts / Eye nuts / Cap nuts / Wing nuts / Weld nuts / Insert nuts
Shipping Terms	EXW / FOB / CIF / CFR / CNF
Payment Terms	TT / LC (must 30-50% as despoit, the balance can be paid by LC after BL), etc
Packaging	Standard export packing, various transportation, according to customer needs.
Application	Steel Structure Construction and Bridges / Piping and Equipment Installation / Automobile Manufacturing / Shipbuilding and Vehicles / Machinery and Industrial Equipment / Energy and Power Equipment / Home Appliances / Electronics / Petrochemicals / Aerospace / Medical Devices, etc.

A nut is an internally threaded fastener, designed to mate with a matching externally threaded bolt or screw.

When assembled, the nut and bolt form a clamp load that securely fastens the connected components.

The threaded engagement generates axial preload, providing a reliable and detachable joint that can withstand specified tensile and shear forces.

SPECIFICATION

Performance Grades & Material Selection

Grade	Material Group	Proof Stress (MPa)	Hardness (HV)	Equivalent Standards	Typical Application
A2-70	Austenitic (304)	700	≤ 290	ISO 3506-2 / GB/T 3098.15	General industrial, food equipment, indoor piping
A4-70	Austenitic (316)	700	≤ 290	ISO 3506-2 / GB/T 3098.15	Marine, chemical, coastal environments
A4-80	Austenitic (316)	800	≤ 330	ISO 3506-2	High-strength corrosive environments
C1-70	Martensitic	700	≤ 290	ISO 3506-2	Valves, pumps, high-temperature applications
F1-45	Ferritic	450	—	ISO 3506-2	Low-strength, non-critical use

Nut Types & Dimensional Standards

Type	Description	Dimensional Standard	Typical Size Range
Hex Nut (Style 1)	Standard height, 6-sided	DIN 934 / ISO 4032	M4 ~ M39
Hex Nut (Style 2)	Higher than Style 1, increased strength	ISO 4033	M5 ~ M36
Hex Jam Nut	Low profile, half height	DIN 439 / ISO 4035	M4 ~ M36
Hex Lock Nut (Nylon Insert)	Self-locking with nylon ring	DIN 985 / ISO 10511	M3 ~ M36
Hex Lock Nut (All-Metal)	Prevailing torque, all-metal	DIN 980 / ISO 7040	M5 ~ M36
Heavy Hex Nut	Thicker and wider than standard	ASME B18.2.2	1/4" ~ 1-1/2"
Square Nut	Square shape	DIN 557	M5 ~ M36
Wing Nut	With two wings for hand tightening	DIN 315 / ISO 4038	M4 ~ M24
Slotted Nut	With slots for cotter pin	DIN 935 / ISO 7036	M4 ~ M39

Size Range & Dimensions

Thread Size (M)	Pitch (mm)	Width Across Flats (mm)	Width Across Corners (mm)	Height (mm)
M4	0.7	7	8.1	3.2
M5	0.8	8	9.2	4
M6	1	10	11.5	5
M8	1.25	13	15	6.5
M10	1.5	17	19.6	8
M12	1.75	19	21.9	10
M14	2	22	25.4	11
M16	2	24	27.7	13
M20	2.5	30	34.6	16
M24	3	36	41.6	19
M30	3.5	46	53.1	24
M36	4	55	63.5	29
M39	4	60	69.3	32

Mechanical Properties

Property Class	Proof Stress (MPa)	Hardness (HV)	Clamp Load (N) - M10 example
A2-50	500	≤ 210	—
A2-70	700	≤ 290	34000
A4-70	700	≤ 290	34000
A4-80	800	≤ 330	39000
C1-70	700	≤ 290	—
F1-45	450	≤ 220	—
Property	A2-70	A4-80
Proof Stress (MPa)	700	800
Hardness (HV)	≤ 290	≤ 330
Typical Clamp Load (M10)	~34,000 N	~39,000 N
Elongation	≥ 0.4d	≥ 0.3d
Operating Temp. Range	-20°C to +150°C	-20°C to +150°C
Extended Temp. Range	Up to +300°C (short-term)	Up to +300°C (short-term)
Cryogenic Temp.	Down to -196°C (suitable)	Down to -196°C (suitable)
Magnetic Permeability	Low (slightly magnetic after cold work)	Low (slightly magnetic after cold work)

FAQ

Q1: What are the main products you can supply?

A: We are a professional manufacturer and supplier in China for stainless steel fasteners and pipe fittings, including stainless steel nuts, bolts, flanges, elbows, and other threaded products. Our stainless steel fasteners are widely used in corrosive environments, food processing, marine, and chemical industries.

Q2: What is the difference between A2-70 and A4-80 stainless steel nuts?

A: A2-70 is made from 304 stainless steel, offering good corrosion resistance for general industrial and food processing applications. A4-80 is made from 316 stainless steel with molybdenum added, providing superior corrosion resistance, especially against chlorides and marine environments. A4-80 also offers higher strength (800 MPa vs 700 MPa for A2-70).

Q3: What nut grades match A2-70 and A4-80 bolts?

A: A2-70 nuts should be paired with A2-70 bolts. A4-80 nuts should be paired with A4-80 bolts. As a general rule, the nut strength grade should be equal to or higher than the mating bolt. Using a lower-grade nut with a higher-grade bolt is not recommended, as it risks thread stripping under load.

Q4: What is your minimum order quantity (MOQ)?

A: For trial orders, our MOQ is 100 pcs per size. For bulk orders, MOQ is flexible — please contact us with your target quantity for a competitive quote. Volume discounts are available for large orders.

Q5: How long is the delivery time?

A: 7-15 days for standard sizes in stock after payment confirmation. For custom orders, delivery time is typically 20-30 days, depending on quantity, grade, and specifications. We will confirm the exact timeline upon order confirmation.

Q6: How do you control quality?

A: We implement strict 3-stage quality control:

Raw material – chemical composition verified by spectrometer per grade requirements (304 / 316 / 316L)
Production – dimensional checks during forming and threading
Final – 100% thread gauging (Go/No-Go), hardness testing, and proof load testing per ISO 3506-2

A Mill Test Certificate (EN 10204 Type 3.1) is provided with every shipment, including chemical analysis and mechanical test results.

Q7: Can I get samples before ordering?

A: Yes. Stock samples are free of charge – you only pay the shipping cost. Custom samples require a small production fee, which will be deducted from your first bulk order.

Q8: Do you accept OEM or custom orders?

A: Yes, we accept custom orders based on your drawings, specifications, or samples. We can also print your logo on products and packaging. Our engineering team will review your requirements and provide a solution within 24 hours.

Q9: Which standards do your products comply with?

A: Our stainless steel nuts are manufactured per:

ISO 3506-2 – Mechanical properties for stainless steel nuts
DIN 934 / ISO 4032 – Dimensions for hex nuts (metric)
ASME B18.2.2 – Dimensions for hex nuts (inch)
ASTM F594 – Stainless steel nuts specification (US market)
GB/T 3098.15 – Mechanical properties (Chinese standard)

Our factory is ISO 9001:2015 certified and SGS audited annually.

MESSAGE

You may be interested in the following relevant items…

Copyright ©Lianzhu Steel Co.,Ltd.

{{title}}