Materials

Carbon Steel

Alloy Steel

Stainless Steel

Standards

Our products are according to the following standards: DIN,ISO,ASTM,SAE,JIS,ANSI......

Bolts

ASTM A193 Grade B7/B7M Heavy Hex Bolts
ASTM A325/A325M Type 1 Structural Bolts
ASTM A490/A490M Type 1 Structural Bolts
SAE J429 Grade 2/5/8 Hex Bolts
DIN 6914 Class 8.8/10.9/12.9 Structural Bolts
DIN 931 933 Class 8.8/10.9/12.9 Hex Bolts
DIN 912 Class 8.8/10.9/12.9 Hex Socket Head Bolts
DIN 6921 Class 8.8/10.9/12.9 Hex Flange Bolts
ISO 4014/4017 Class 8.8/10.9/12.9 Hex Bolts
AS 1252 Grade 8.8 High Strength Steel Bolts

Threaded Rods

ASTM A193 Grade B7/B7M/B8/B8M/B16 Threaded Rods/Studbolts/Round Bars
ASTM A320 Grade L7/L7M/B8/B8M Threaded Rods/Studbolts/Round Bars
DIN 975/976 Class 4.8,8.8,10.9,12.9 Threaded Rods
SAE Garde 2/5/8 & ASTM A307 Grade A/B Thraded Rods

Nuts

ASTM A194 Grade 2H/2HM/7/7M/8/8M Heavy Hex Nuts
ASTM A563M 10s Heavy Hex Nuts
SAE J995 Grade 2/5/8 Hex Nuts
DIN 6015 Class 8/10 Heavy Hex Nuts
DIN 934 Class 4/6/8/10 Hex Nuts

DIN 6923 Class 8/10 Hex Flange Nuts
ISO 4032 Class 4/6/8/10 Hex Nuts
AS 1252 Grade 8 High Strength Steel Nuts

Washers

ASTM F436/F436M Type 1 Flat Washers
DIN 125A Flat Washers
DIN 127B Spring Washers
DIN 6916 Flat Washers
AS 1252 Structural Washers

DTI Washers/Astm F959/959m

Commonly used testing equipment:

Tensile Tester, Hardness Tester, Salt Spray Tester, Metallographic Inspection..

Product inspection:

Select the bolts to be inspected according to the specifications to ensure that the samples are representative and record the batch, specifications and other information.

1. Appearance: whether there are defects on the surface of the product (such as cracks, deformation, rust, etc.).

2. Dimension measurement (diameter, length, pitch, head thickness, etc.), reference standards, check tolerance range.

3. Mechanical performance test: bolt tension test, nut load holding test, hardness test, etc.

4. Check the adhesion of the coating and milk corrosion.

5. Summarize the test report and compare the standard limit.

Services

Material

Carbon steel, alloy steel, stainless steel, Special material customization
Directly obtaining goods from the raw material factory, with favorable prices and sufficient stock.
standard

Strictly produce according to standard dimensions such as DIN, ISO, GB, JIS, ASTM, SAE, ASME, etc
Customizable

Accept customized production (including sample processing, drawing processing), OEM production

Quick Links

Fasteners

Contact Us

WhatsApp: +8618067522199
Telephone: +86-574-86595122
Phone: +86-18069043038
Email: sales2@topboltmfg.com
Address: Yuyan, Xiepu Chemical Industrial Zone, Zhenhai District, Ningbo, China

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