What is the delivery time for standard and non-standard parts?

Standard parts take 7-15 days, while non-standard parts take 15-25 days.

Can you provide custom-made bolts based on drawings or samples?

Yes, you can send pictures, photos, drawings, or samples, and we will custom-make the hardware according to your requirements.

What is the surface finish of the bolt?

The bolt features a Hot Galvanizing finish, appearing silver in color.

H. D. G 5/16"*70 A325 Heavy Hex Bolt Unc Unf Galvanized Bolt

Name: H. D. G 5/16"*70 A325 Heavy Hex Bolt Unc Unf Galvanized Bolt
Brand: Shanghai G&T Industry Co., Ltd.
SKU: 2062558442

Shanghai, ChinaShanghai G&T Industry Co., Ltd.

US$0.10

2,000-2,999 Pieces

US$0.08

3,000-3,999 Pieces

US$0.06

4,000-4,999 Pieces

US$0.05

5,000-9,999 Pieces

US$0.03

10,000+ Pieces

Sample price:US$0.01/piece.Request sample

Product profile

Customization

Available

Material

Carbon Steel

Type

Hexagon Head

Model NO.

A325

Connection

Common Bolt

Head Style

Hexagonal

Standard

DIN, ANSI, GB, JIS, BSW, GOST

Application

Machinery, Chemical Industry, Environmental, Building

Finish

Hot Galvanizing

Other Product Name

Hex Head Screw / Hh Bolt / Outer Hex Head Bolt

Dimensiong Standard

ASME B 18.2.6

Equivalent

AISI B 18.2.6

Thread

Full Thread/Half Thread

Diameters

3/8"~3"

Length

Custom

Color

Silver

Measure System

Imperial

Measure Unit

Inch

Quality

Good

Head Mark

G&T or OEM

Company Type

Factory / Direct Manufactory

Stock

Plenty

After-Sale Service

Available

Delivery Time

30 Days in Usual

Transport Package

Carton or Wooden Boxes

Specification

25mm*30mm*50mm

Trademark

G&T

Origin

China

HS Code

7318159001

Production Capacity

300000 Pieces/Month

Key features

High Strength Structural Bolt: ASTM A490 grade carbon steel bolts designed for steel-to-steel structural connections.

Custom Dimensional Options: Diameters from 3/8" to 3" with custom length and thread options (full/half).

Hot Dip Galvanized Finish: Silver hot galvanizing finish provides improved durability and corrosion resistance.

OEM/ODM Customization: Custom hardware manufacturing available via drawings, samples, or designs.

Strict Quality Control: ISO9001:2008 compliant processes with rigorous testing including salt spray and hardness.

Fast Delivery Time: Standard parts ship in 7-15 days; non-standard parts in 15-25 days.

Large Supply Capacity: Monthly supply ability of 300,000 pieces with plenty stock available.

Professional Expertise: Over 20 years experience in fasteners with proficiency in DIN/ASME/ASTM standards.

Company profile

Years of Export ExperienceHigh Repeat Buyers ChoiceFast DeliveryManagement Certification

Shanghai G&T Industry Co., Ltd.

Shanghai, China

Business Type: Manufacturer/Factory CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 10 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤1.71h

AI-Powered supplier vetting

SummaryShanghai G&T Industry Co., Ltd. is identified as a limited trading company offering bolts, nuts, threaded rods, stud bolts, and customized fasteners. The supplier reports broad customization, ODM capability, new products launched during the past year, and OEM service for well-known brands. Stated annual productivity includes 6,000 tons of thread rods, 5,000 tons of bolts, 5,000 tons of nuts, 3,000 tons of washers, and 3,000 tons of stud bolts. Service procedures include documented supplier assessment, corrective and preventive actions, and customer complaint handling, with lead times within 15 workdays in both peak and off-season. However, the supplier has no overseas agents or branches, overseas warehouse, showroom, or inventory capability. Raw-material traceability, quality assurance status, outsourcing controls, and contract status are unknown. An audit by TUV Rheinland is recorded, but the audit type and evaluation result are not sufficiently interpretable from the provided values.

Supplier typeThe supplier is a limited company classified as a trading company, with a stated business scope covering metal materials, hardware, machinery, and related products. Its offered products are bolts, nuts, threaded rods, stud bolts, and customized fasteners, and it is not identified as part of a larger company group.

After-Sales capabilityThe supplier has documented and followed procedures for corrective and preventive actions and customer complaint handling. It has no overseas agents or branches, overseas warehouse, showroom, or in-stock service capability, which limits local and immediate after-sales support.

R&D capabilityThe supplier reports new products during the past year, ODM service, and multiple design-based customization options. It does not have an available SDK, but the available evidence supports product development and design capability.

Production capacityReported annual productivity is 6,000 tons of thread rods, 5,000 tons each of bolts and nuts, and 3,000 tons each of washers and stud bolts. Lead time is stated as within 15 workdays in both peak and off-season; however, the supplier also reports no inventory capability, while outsourcing procedures and manufacturing-capacity contracts remain unknown.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, minor customization, and flexible customization. Its product scope also expressly includes customized fasteners, and it reports ODM capability.

Product Q&A

Q:What is the material and grade of the bolt?

The bolt is made of Carbon Steel with Grade ASTM A490.

Q:What are the available diameter and length options?

Diameters range from 3/8" to 3". Length is customizable according to customer requirements.

Q:How is the quality of the bolts ensured?

All processes strictly adhere to ISO9001:2008 procedures with strict quality control from production to delivery.

Q:What is the minimum order quantity (MOQ)?

The minimum order quantity is 500 pieces.

Q:What are the payment terms?

Payment methods include T/T, L/C, D/A, D/P, Western Union, and PayPal. For production, 30% deposit by T/T is required before production, with the balance paid before shipment.