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Bolt

custom bolt manufacturer

Product Range

The material we can offered are stainless steel #304(A2), #316(A4), Hastelloy Alloy, Monel Alloy, Inconel Alloy

Stainless Steel Bolt

The head we can offered are round head and clipped head, the length range from 1 1/4-26″

Guardrail Bolt

The grades are ASTM A325 and ASTM A490

Heavy Hex Structural Bolt

The head types cover socket head cap screws,  socket flat countersunk head cap screws,  socket button head cap screws, socket low head cap screws

Socket Cap Screw

The material we can offered are stainless steel #304(A2), #316(A4), Hastelloy Alloy, Monel Alloy, Inconel Alloy

The head we can offered are round head and clipped head, the length range from 1 1/4-26″

The grades are ASTM A325 and ASTM A490

The head types cover socket head cap screws,  socket flat countersunk head cap screws,  socket button head cap screws, socket low head cap screws

Stainless Steel Bolt

Guardrail Bolt

Heavy Hex Structural Bolt

Socket Cap Screw

Timber bolt have four fillets,  the sizes have 1/2″, 5/8″, 3/4″, and use in wood to wood applications

Timber Bolt

Ideal for pivoting applications or for mounting items

Shoulder Bolt

Features a smooth, rounded head and square neck

Carriage bolt

Supply for an integrated flange for load distribution

Hex Flange Bolt

Timber bolt have four fillets,  the sizes have 1/2″, 5/8″, 3/4″, and use in wood to wood applications

Ideal for pivoting applications or for mounting items

Features a smooth, rounded head and square neck

Supply for an integrated flange for load distribution

Timber Bolt

Shoulder Bolt

Carriage bolt

Hex Flange Bolt

Use for heavy-duty plowing applications

Plow Bolt

Designed for high-tension applications

TC Bolt

Secures piping and other round objects firmly

U Bolt

Offers superior holding in profiles with T-slots

T-head Bolts

Use for heavy-duty plowing applications

Designed for high-tension applications

Secures piping and other round objects firmly

Offers superior holding in profiles with T-slots

Plow Bolt

TC Bolt

U Bolt

T-head Bolts

Widely used in the oil & gas industry

Threaded Bar

The classic bolt design for general-purpose fastening

Hex Bolt

Use for the general industrial needs

Square Head Bolt

Ideal for lifting, securing with a looped head

Eye Bolt

Widely used in the oil & gas industry

The classic bolt design for general-purpose fastening

Use for the general industrial needs

Ideal for lifting, securing with a looped head

Threaded Bar

Hex Bolt

Square Head Bolt

Eye Bolt

Your Trusted Supplier of Bolt Needs

Founded in 2020, Shanghai Hengrui is a professional manufactuer for standard and non standard fastener, like bolts, screws, nuts, washers, as well as stamping parts and turning parts, with many different materials, like carbon steel, stainless steel, brass, aluminum, titanium, special alloy steel, etc.

What is bolt?

Bolt is a kind of fastener, which include a head and a cylindrical body with threads, are use to connect two or more objects through inserted in pre-made holes, then fasten with a nut in the other end.

What is bolt 2
What is bolt 2

What is bolt?

Bolt is a kind of fastener, which include a head and a cylindrical body with threads, are use to connect two or more objects through inserted in pre-made holes, then fasten with a nut in the other end.

The head type of Bolt

Hex head, Heavy hex head, Round head, Hex flange head, T head, Square head

Fullsize Body

Full size body

The body diameter is very close to the major diameter of threads. Full-size body have better mechanical properties than undersize body, because they have more material in the shank.

Undersize Body

Undersize body

The diameter of undersize body is smaller than the major diameter of threads

Bolt Body Type

The diameter of a bolt’s body plays a crucial role in its strength and application.

Bolt Body Type

The diameter of a bolt’s body plays a crucial role in its strength and application.

Fullsize Body

Full size body

The body diameter is very close to the major diameter of threads. Full-size body have better mechanical properties than undersize body, because they have more material in the shank.

Undersize Body

Undersize body

The diameter of undersize body is smaller than the major diameter of threads

Bolt Thread Lengths

The thread length of a bolt affects its grip strength and the types of materials it can effectively join.
The thread length of bolt have two kinds: Full thread and Partial thread

Full Thread Bolts

Full Thread

These bolts have threads that extend from the end to the head, providing maximum grip strength. They can be used in a variety of applications where the bolt is not subjected to significant shear forces. Full Thread Bolts for Maximum Grip

Partial Thread Bolts

Partial Thread

Having a non-threaded shoulder between the head and the thread part, partial thread bolts are stronger under shear forces. They are ideal for aligning structures due to the smooth shoulder. Partial Thread Bolts for Enhanced Shear Strength

Thread type: M/UNC/UNF

DIN ( M )
Diameter (mm)Pitch (mm)Diameter (mm)Pitch (mm)
M61M243
M81.252
1M273
M101.52
1.25M303.5
12
M121.75M333.5
1.252
1.5M364
M1423
1.5M424.5
M1623
1.5M454.5
M182.5M485
23
1.5M525
M202.5M565.5
24
1.5
M222.5
2
1.5
ANSI, ASME, IFI ( UNC/UNF )
Diameter (Inch)Pitch (Threads Per Inch)Diameter (Inch)Pitch (Threads Per Inch)
1/4-20UNC7/8-9UNC
28UNF14UNF
5/16-18UNC1"8UNC
24UNF12UNF
3/8-16UNC1-1/8-7UNC
24UNF8UNF
7/16-14UNC1-1/4-7UNC
20UNF8UNF
1/2-13UNC1-3/8-6UNC
20UNF8UNF
9/16-12UNC  18UNF1-1/2-6UNC
5/8-11UNC8UNF
18UNF1-3/4-5UNC
3/4-10UNC8UNF
16UNF

Dimension Standard

Bolt type Bolt Standard
Hex bolt ASME/ANSI B 18.2.1, IFI149, DIN931, DIN933, DIN558, DIN960, DIN961, DIN558, ISO4014
Square bolt ASTM B18.2.1
Heavy Hex Structural Bolt ASTM B18.2.6, DIN6914
Socket cap screw ASME B18.3, DIN912, DIN6912,DIN7984, DIN7991
Carriage bolt ASTM B18.5, DIN603
Hex flange bolt ASTM B18.2.1, DIN6921
T head bolt ASME/ANSI B18.5, DIN186 DIN261 DIN787
Plow bolt ASTM B18.9, DIN605, DIN608
U bolt ASME B18.31.5, DIN3570
TC bolt ASTM B18.2.6
Splice bolt ANSI/ASME B18.10
Shoulder bolt ASME B18.3

Grade Specification

A307 & A394 Grade

Standard for BoltGradeTension StengthYield StrengthEnlogationLengthHardness
ksiksi%in.BrinellRockwell B
A307GR.A60min--18<3*D121-241HRB69-100HRB
≥3*D241max100max
GR.B60-100--18<3*D121-21269-95
≥3*D212max95max
A394type07480-100
type112025-34

A325 Grade

Standard for BoltGradeBolt SizeTension StengthYield StrengthEnlogationBolt LengthHardness
in.ksiksi%in.BrinellRockwell C
A325type1 1/2-1 120min92min 14min<2*D253-31925-34HRC
≥2*D319max34max
1-1/8~1-1/2 105min 81min14min<3*D223-28619-30HRC
≥3*D286max30max

SAE J429 Grade

Standard for BoltGradeBolt SizeTension StengthYield StrengthEnlogationHardness
in.ksiksi%Surface 30N maxCore Rockwell
SAE J429GR.21/4 to 3/4745718/B80-100
over 3/4 to 1-1/2603618/B70-100
GR.51/4 to 1120921454C25-34
over 1 to 1-1/2105811450C19-30
GR.81/4 to 1-1/21501301258.6C33-39

A354 & A490 Grade

Standard for BoltGradeBolt SizeTension StengthYield StrengthEnlogationHardness
in.ksiksi%BrinellRockwell C
A354BC1/4~2-1/2 125min109min16255-33126-36
>2-1/2 115min99min16235-31122-33
BD1/4~2-1/2 150min130min14311-36333-39
>2-1/2 140min 115min14293-36331-39
A490type11/2~1"150-173130min14<2*D, HB 311-352;>2*D, HB…-352; <2*D, 33-39;>2*D, HC…-39;
1~1-1/2"150-173130min14<3*D,HB313-352;>3*D,HB…-352<2*D, 33-39;>2*D, HC…-39;

A449 Grade

Standard for BoltGradeBolt SizeTension StengthYield StrengthEnlogationHardness
in.ksiksi%BrinellRockwell C
A449type11/4 to 1120min92min14255-32125-34
over 1 to 1-1/2 105min81min14223-28519-30
over 1-1/2 to 390min58min14183-235/
type21/4 to 1120min92min14255-32125-34
over 1 to 1-1/2 105min81min14223-28519-30
over 1-1/2 to 390min58min14183-235/

A193 Grade

Standard for BoltGradeBolt SizeTension StengthYield StrengthEnlogationReduction of AreaHardness
in.ksiksimin%min%BrinellRockwell
A193B7to 2-1/2125min105min1650/C35
over 2-1/2 to 4115min95min1650
over 4 to 7100min75min1850
B7M to 4100min80min1850235B99
over 4 to 7100min75min1850235B99
Class 1:
B8,B8M
all75min30min3050223B96
B16to 2-1/2125min105min1850321C35
over 2-1/2 to 4110min95min1745321C35
over 4 to 7100min85min1645321C35
Class 2:B8Mto 3/4110min96min1545321C35
over 3/4 to 1120min80min2045321C35
over 1 to 1-1/4110min95min2545321C35
over 1-1/4 to 1-1/2100min85min3045321C35

ISO 898-1 2009(DIN931/933) Grade

Standard for BoltGradeBolt SizeTension StengthYield StrengthProof Load Stress EnlogationHardness
mmMpaMpaMpa%
ISO 898-1 2009(DIN931/933)4.8420min340min310-B71-95
5.8520min420min380-B 82-95
6.8600min480min440-B 89-99.5
8.8≤16800min640min58012C22-32
>16830min660min60012C23-34
10.91000min940min8309C32-39
12.91200min1100min9708C39-44

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