A4-80 stainless steel socket screws exporter
XZ Fastener exports A4-80 stainless steel socket screws for importers, distributors, equipment builders, and project buyers that need higher-strength stainless fasteners with controlled internal hex drive dimensions. These screws can be supplied as DIN 912 / ISO 4762 socket head cap screws, Allen head screws, or custom socket fasteners according to order requirement. A4-80 is suitable for many marine, outdoor, chemical equipment, and machinery assemblies where A4 stainless corrosion resistance and stronger mechanical performance are required. Buyers can source stainless steel socket head cap screws with packing, labeling, and inspection documents prepared for shipment.
Standard
DIN 912 / ISO 4762; drawing-based socket screws
Strength
A4-80; A4-70 and A2-70 available upon request
Material
A4 / 316-family austenitic stainless steel
Finish
Plain, passivated, pickled and passivated, lubricated
Application
Marine machinery, chemical equipment, precision assemblies
What Buyers Should Know Before Sourcing A4-80 Stainless Steel Socket Screws
Export orders for A4-80 stainless steel socket screws need more than a size and quantity. Buyers should confirm the standard, head style, internal hex drive size, thread length, material grade, property class, finish, packing method, destination requirement, and inspection documents before production starts.
Confirm the socket screw type
DIN 912 and ISO 4762 are common references for socket head cap screws, while low head, button head, countersunk head, and shoulder designs have different geometry. Related metric Allen head socket cap bolts can be reviewed when standard DIN 912 items are required.
Check the A4-80 requirement
A4-80 is selected when buyers need a higher stainless property class than A4-70. It should be confirmed by size and length because some large diameters, special lengths, or custom designs may need additional production review.
Prepare export packing details
Importers should specify carton weight, inner packing, pallet requirement, barcode label, shipping mark, and document requirements. This helps reduce receiving problems and prevents mixed-size confusion after arrival.
Common Purchasing Descriptions
Clear descriptions help avoid wrong head type, wrong stainless grade, or incorrect export packing. Common buyer wording includes:
- A4-80 stainless steel socket screws DIN 912, M8 x 30, full thread, passivated finish, export carton packing.
- ISO 4762 A4-80 stainless socket head cap screws, metric coarse thread, plain finish.
- 316 stainless steel Allen head screws, A4-80, with material test certificate available upon request.
- A4-80 socket cap screws with matching stainless flat washers and spring lock washers.
- Custom stainless socket screws according to drawing, A4-80, controlled socket depth and head height.
- Separate carbon steel items such as DIN 933 full thread hex bolts, Grade 8.8 carbon steel hex bolts, metric hex head bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts when the shipment includes both socket screws and external hex fasteners.
If the order includes socket screws, nuts, washers, and hex bolts together, each product family should have its own standard, material, grade, finish, and packing line.
Detailed Specifications Table
| Item | Specification | Export Purchasing Notes |
|---|---|---|
| Product name | A4-80 stainless steel socket screws | Also called A4-80 socket head cap screws or Allen head screws. |
| Common standards | DIN 912, ISO 4762, drawing-based socket screws | State the exact standard to control head and drive dimensions. |
| Diameter range | Common metric sizes such as M3-M24; other sizes reviewed by order | A4-80 supply should be confirmed by diameter, length, and quantity. |
| Length | Standard lengths or custom lengths according to drawings | Specify full thread, partial thread, or exact thread length. |
| Thread | Metric coarse thread; fine pitch available upon request | Fine pitch must be clearly marked in drawings and packing lists. |
| Material | A4 / 316-family austenitic stainless steel | Final chemical composition follows the selected standard and purchase order. |
| Property class | A4-80 under ISO 3506 reference | A4-70 may be discussed when A4-80 is not required by design. |
| Finish | Plain, passivated, pickled and passivated, polished, lubricated | Finish should match corrosion exposure and assembly method. |
| Inspection | Head dimensions, socket gauge, thread gauge, visual appearance, material documents, mechanical reports upon request | Socket drive quality is important for tool fit and assembly control. |
| Export packing | Bulk cartons, small boxes, bags, pallet packing, barcode labels, shipping marks | Packing can be arranged according to order requirement. |
Material and Grade Explanation
A4 stainless steel is a molybdenum-bearing austenitic stainless group often selected for marine air, outdoor moisture, chloride exposure, chemical equipment, and other corrosive environments. A4-80 identifies a higher-strength stainless property class than A4-70, commonly associated with a minimum tensile strength level of 800 MPa under ISO 3506 reference conditions.
For project buyers and importers, the choice between A2-70, A4-70, and A4-80 should consider corrosion exposure, required clamp load, mating material, tightening method, and galling risk. XZ Fastener explains these differences in its guide to stainless steel bolt grades A2-70, A4-70, and A4-80.
A4-80 stainless socket screws should not be treated as a direct replacement for alloy steel socket head cap screws without engineering review. Alloy steel may offer higher strength, while A4-80 is selected when stainless corrosion resistance is the main requirement.
Inspection can include head dimensions, socket drive quality, thread fit, surface condition, packing marks, and documents.
Surface Finish Selection Guide
A4-80 stainless steel socket screws are commonly exported in plain stainless or passivated finish. Passivation helps remove free iron contamination and supports the natural stainless protective layer. Pickling and passivation may be discussed when a cleaner stainless surface is required. Lubrication can be important for A4-80 socket screws because stainless threads may gall under high tightening pressure.
| Finish | Typical Export Use | Buyer Note |
|---|---|---|
| Plain stainless | General machinery, replacement parts, standard stainless stock | Common finish when no additional surface treatment is specified. |
| Passivated | Marine air, outdoor equipment, chemical machinery, clean stainless assemblies | Often requested where corrosion resistance and clean surface are both important. |
| Pickled and passivated | More demanding stainless surface cleaning requirements | Confirm appearance expectation and acceptance criteria before production. |
| Lubricated | Higher clamp load, repeated assembly, galling-sensitive applications | Torque behavior changes when lubrication is used. |
| Carbon steel coatings | Zinc plated DIN 933 bolts, black oxide DIN 933 bolts, hot dip galvanized DIN 933 bolts | These descriptions normally apply to carbon steel hex bolts, not standard A4 stainless socket screws. |
For broader finish comparisons, review XZ Fastener’s fastener finish guide.
Manufacturing and Quality Control
Export supply begins with order review of the standard, diameter, length, thread pitch, material grade, property class, finish, drive dimensions, packing method, destination requirement, and inspection documents. Depending on size and order details, A4-80 stainless socket screws can be produced by cold heading, thread rolling, machining, or combined processes.
Order confirmation
XZ Fastener checks the purchase description, drawing, head style, socket drive, thread length, material grade, finish, and document requirements. Buyers can browse wider fastener products when the shipment also includes washers, nuts, threaded rods, anchors, or hex bolts.
Production control
Common control points include head diameter, head height, socket depth, socket gauge fit, thread gauge fit, surface appearance, burr control, grade separation, and mixed-size packing prevention.
Custom export orders
For modified heads, special lengths, non-standard thread, shoulder designs, special labels, or private packing, XZ Fastener can review custom fasteners from drawings, samples, photos, or buyer packing requirements.
Applications
A4-80 stainless steel socket screws are exported for assemblies where corrosion resistance, compact head design, internal drive installation, and higher stainless strength are needed.
- Marine equipment and coastal machinery
- Chemical processing equipment
- Stainless machine frames and guards
- Pump, valve, and instrument assemblies
- Food and beverage equipment supports
- Outdoor automation and electrical enclosures
- Precision mechanical assemblies
- Maintenance replacement parts for corrosive environments
For high-vibration, high-load, or safety-sensitive joints, the mating thread, tightening method, lubrication, and inspection documents should be reviewed before bulk shipment.
How to Get a Faster Quotation
A clear export inquiry helps XZ Fastener quote A4-80 stainless steel socket screws accurately. Please provide:
- Size list, such as M5 x 16, M6 x 20, M8 x 30, M10 x 40.
- Standard or drawing, such as DIN 912, ISO 4762, low head, button head, countersunk head, or custom design.
- Material and grade, such as A4-80, A4-70, A2-70, or 316 stainless steel.
- Thread requirement, including coarse thread, fine pitch, full thread, or exact thread length.
- Finish requirement, such as plain, passivated, pickled and passivated, or lubricated.
- Quantity for each size and expected delivery schedule.
- Packaging requirement, including bulk carton, small box, bag, pallet, label, barcode, or private packing.
- Inspection requirements, such as material certificate, dimensional report, socket gauge check, or third-party inspection.
- Destination port, delivery term, shipping marks, and any pallet size or weight limit.
For a structured inquiry, use the request a quote page or contact XZ Fastener with drawings, photos, or a spreadsheet.
FAQ
What does A4-80 mean for stainless steel socket screws?
A4 refers to the 316-family stainless group, and 80 refers to a higher stainless property class under ISO 3506 reference. Buyers usually specify A4-80 when they need corrosion resistance and stronger stainless mechanical performance.
Are DIN 912 and ISO 4762 socket screws interchangeable?
They are closely related socket head cap screw standards, but buyers should state the exact standard required because dimensional details, document wording, and acceptance expectations may differ.
Can A4-80 socket screws replace alloy steel socket head cap screws?
Not automatically. Alloy steel socket screws may offer higher strength, while A4-80 stainless socket screws provide corrosion resistance. The load, environment, and assembly method should be checked before substitution.
Can XZ Fastener export matching washers and nuts?
Yes. Stainless flat washers, spring washers, hex nuts, and assembled packing can be supplied according to the screw standard, thread, material, and order requirement.
How can buyers reduce galling risk during assembly?
Buyers can consider lubrication, anti-seize compound, controlled tightening speed, clean mating threads, and correct mating material. This should be reviewed when high clamp load or repeated assembly is expected.
What export documents can be requested?
Material test certificates, dimensional inspection reports, socket gauge checks, thread inspection records, packing lists, and other documents can be discussed according to order requirement.
Can custom A4-80 socket screws be made from drawings?
Custom head height, shoulder dimensions, special thread pitch, special length, marking, and packaging can be reviewed from drawings, samples, photos, quantity, and application details.
Send Your A4-80 Stainless Socket Screw Inquiry
Send your size list, finish, quantity, packaging method, and inspection requirements. Include the standard or drawing number, head type, thread pitch, thread length, destination, shipping marks, and whether washers or nuts are needed. XZ Fastener will review the details and prepare a quotation according to your order requirement.
English 
Español 
Tiếng Việt 
Русский 
العربية