Stainless Steel 304 Fasteners Manufacturers in India
Stainless Steel 304 Fasteners Manufacturer, ASTM A 193 Stainless Steel 304 Fasteners, ASME SA 193 Stainless Steel 304 Fasteners, High Tensile Stainless Steel 304 Fasteners, Industrial Stainless Steel 304 Fasteners, SS 304 Nuts, SS 304 Bolts, SS 304 Screws, SS 304 Washers, SS 304 Bolts and Screws, SS 304 Heavy Hex Bolts, SS 304 Finished Hex Bolts, SS 304 Oval Neck Track Bolts, SS 304 Bent Bolts, SS 304 Hex Cap Screws,SS 304 Heavy Hex Screws Manufacturers in India. ANSI/ASME B18.2.1,B18.2.2,B18.2.3 SS 304 Fasteners.
Stainless Steel 304 Fasteners Manufacturer, 304 Stainless Steel Fasteners Suppliers, Werkstoff No 1.4301 Stainless Steel 304 Fasteners, UNS S30400 Stainless Steel 304 Fasteners Manufacturer, Stainless Steel 304 Metric Fasteners, A2 Stainless Steel 304 Fasteners, A4 Stainless Steel 304 Fasteners, 304 SS Fasteners Suppliers in Nigeria, Australia, Egypt, Iran , Iraq
Riton Metal Industries is specialized in manufacturing and supplying of Stainless Steel 304 Fasteners , Pipe Fitting, Forged Fittings, Butt weld fittings, Flanges in Stainless steel, alloy Steel & carbon Steel since 1991, we manufacture wide range of 304 Stainless Steel Fasteners such as SS 304 nuts,SS 304 bolts,SS 304 screws,SS 304 washers,SS 304 bolts and screws,SS 304 heavy hex bolts,SS 304 finished hex bolts,SS 304 oval neck track bolts,SS 304 bent bolts,SS 304 hex cap screws,SS 304 heavy hex screws,SS 304 12-point screws,SS 304 socket head cap screws etc. as per International standard like ASME/ASTM/API, we are supplying & exporting Stainless Steel 304 Fasteners in seamless & welded both forms to more than 60 countries for over 2 decades, we have our dealers & distributors in Nigeria, Australia, Malaysia, Egypt, South Africa, Tanzania, Kenya, Mozambique, Angola, Gabon Germany, Turkey, France, United Kingdom, Italy, Netherlands, Iran , Iraq , Saudi Arabia, United Arab Emirates , Iisrael, Jordan, Oman, Kuwait, Qatar, Bahrain, Bangladesh, China, Indonesia, South Korea, Pakistan, Philippines, Singapore, Sri Lanka, Thailand, Vietnam, Brazil, Colombia, Argentina & United States of America, Riton Metal Industries is the only company in INDIA which is approved Manufacturer & supplier of Stainless Steel 304 Fasteners in 300 top companies worldwide. Few of them are ORPIC, NIORDC, Saudi Aramco, SABIC, PIDMCO, GASCO, KNPC, Indian Oil, BPCL, HPCL, NTPC, BARC & Indian Navy, Riton Metal Industries is ISO 9001:2008, ISO 14001, OHSAS 18001 Certified Company since 2006 & PED approved Manufacturer since 2008, Riton Metal Industries is India's 6th largest Manufacturer, supplier & exporter of Stainless Steel 304 Fasteners .
Riton Metal Industries is manufacturing & exporting pipe flange from 1/2” thru 200”, 150 lbs to 3000 lbs including Carbon Steel Fasteners , Stainless Steel 304 Fasteners and Alloy Steel Fasteners according to ANSI , API , MSS , DIN for the world market. We are experienced & specialized in manufacturing special ring Fasteners and other forgings as per drawing provided by our clients.
We supply ASME Code and Non Code Industrial Fasteners for the Petrochemical, Chemical & Waterworks industries. check our price before buying Fasteners in Carbon Steel Fasteners , Stainless Steel 304 Fasteners , Alloy Steel Fasteners .
Stainless Steel 304 Fasteners Specification
Standards | : | ASTM, ASME |
Designation | : | A /SA 193 / 194 |
Grade | : | Stainless steel 304 Fasteners |
STANDARD | BS | UNS | JIS | EN | WERKSTOFF NR. | GOST | AFNOR |
SS 304 | 304S31 | S30400 | SUS 304 | X5CrNi18-10 | 1.4301 | 08Х18Н10 | Z7CN18‐09 |
Material | Size | Standards | Length | Specification | Manufacturer |
Stainless Steel
| M02 to M33 | ASTM / ASME - A/ SA 193 / 193 | 3 mm | IS BS ASTM | GKW Unbrako Kundan APL Sundaram Precision EBY Fastener Etc. |
Note:- | ||||
Stainless Steel in Grade: | 304 304L 316 316L | 309 310 317L 321 | 347 409 410 420 | 430 446 202 Etc. |
Type of Fasteners: | Bolts (Eyebolt) Stud Nuts (Nylock, Lock) Washer (Star, Plain) Allen Caps Screws (CSK, Pen Head, Philip, Mushroom, Cheese) Clamp (U, J, L) Grab Rivet (Pop & Hollo) Etc. | |||
In Form of: | Hex Square Round Threading as per Gauge Etc. |
Packing: | IN BULK :canton/pallet, Small Boxs/carton/ pallet, or customer request | |||
---|---|---|---|---|
Origin and service-region: | European Origin of 304 Stainless Steel Fasteners are Western European. However projects with eastern origin are possible on request. | |||
TEST CERTIFICATE | Manufacturer Test Certificate as per EN 10204 / 3.1 | |||
Product Grades: | 304, 304L, 316, 316L, 316Ti, 200 series |
Property Class of Stainless Steel 304 Fasteners
For Bolts & Screws: A2-70, A2-80, A4-70, A4-80, F593C, F593D, F593G, F593H
For Nuts: A2-70, A2-80, A4-70, A4-80, F594C, F594D, F594G, F594H, A2-035, A4-040
For SHCS: F837B, F837C, F837E, F837
For Threaded Rods: A2-70, A2-80, A4-70, A4-80, F593C, F593D, F593G, F593H, B8, B8M CL1 & CL2
Grade Designation of Stainless Steel 304 Fasteners
AISI Grade Equivalent | JIS Equivalent | Stainless Steel Notation | EN/DIN Numerical Equivalent | UNS designation | EN/DIN Symbolical Equivalent |
AISI 304 | SUS304 | SS 304 | EN 1.4301 | UNS S30400 | X4CrNi18-10 |
AISI 304L | SUS304L | SS 304L | EN 1..4307 | UNS S30403 | X2CrNi18-9 |
AISI 304LN | SUS304 LN | SS 304 LN | EN 1.4311 | UNS S30453 | X2CrNiN18-10 |
Stainless Steel 304 Fasteners Dimensions
Full Range of Fastener Products both Imperial & Metric. Dimensions range from M3 to M72 and quantities from 1 to 10,000.
Hexagon Bolts / Set Screws |
Stud Bolts |
Hexagon Nuts |
Socket Capscrews |
---|---|---|---|
DIN 931 | BS4882 | DIN 934 | DIN 912 |
DIN 933 | DIN 976 | BS 1768 | DIN 6912 |
BS 1768 | BS 1769 | DIN 7984 | |
UNI 5731 | BS 1083 | ANSI B18.3 | |
UNI 5739 | BS 3692 | ISO 4762 | |
ISO 4014 | ISO 4032 | UNI 5931 | |
ISO 4017 | ISO 4033 | BS 2470 | |
BS 1769 | ANSI B18.2.2 | BS 4168 | |
BS 3692 | |||
ANSI B18.2.1 |
Socket & Slotted Set Screws |
Socket & Slotted Countersunk Screws |
Studs |
Washers |
---|---|---|---|
DIN 913 | DIN 963 | DIN 938 | DIN 125 |
DIN 914 | DIN 7991 | DIN 939 | DIN 9021 |
DIN 915 | BS 4168 | DIN 2510 | BS 4320 |
DIN 916 | BS 1981 | BS 4439 | BS 3410 |
DIN 551 | BS 483 | BS 2693 | |
DIN 553 | BS 2470 | Spring Washers | |
DIN 438 | DIN 127 | ||
BS 4168 | BS 4464 | ||
BS 1802 |
Grade Specification Comparison of Stainless Steel 304 Fasteners
Approximate grade comparisons for 304 stainless steels Fasteners
Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
---|---|---|---|---|---|---|---|
BS | En | No | Name | ||||
304 | S30400 | 304S31 | 58E | 1.4301 | X5CrNi18-10 | 2332 | SUS 304 |
304L | S30403 | 304S11 | – | 1.4306 | X2CrNi19-11 | 2352 | SUS 304L |
304H | S30409 | 304S51 | – | 1.4948 | X6CrNi18-11 | – | – |
These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted. |
- DIN/ISO A2 Stainless Steel Is A Corrosion Resistant Steel; It Is Also Known As ASTM-304.
- A2 / ASTM-304 Is An 18/8 Stainless Steel : This Designates A Metallurgical Content Of 18% Chromium & 8% Nickel.
- A Bolt Marked A2-70 Is A 304 Stainless Steel Bolt With A 700 N/mm2 Tensile Strength (See Below Table).
The -70 Representing The Tensile Strength Divided By 10.
-50 & -80 Grades Are Also Available But Are Not All That Common. - A2 / 304 Stainless Steel Is What Is Known As An Austenitic Stainless Steel : It Is (Mostly) Non-Magnetic.
- Though Some Residual Magnetism Can Be Introduced When The Material Is Cold Worked.
- A2 / 304 Stainless Steel Is One Of The Most Highly Corrosion-Resistant Materials Available To The Designer And Engineer.
Four Properties of Stainless Steel 304 Fasteners
Stainless steel 304 fastener use stainless steel as raw materials. Stainless steel 304 fastener has four properties.1. High temperature resistance. For high hardness, the fastener has strong oxidation resistance. It cannot work under high temperature and cannot be interfered by high temperature. If the fastener is passivated after being made out, the temperature resistance will be better.
2. Physical properties. Stainless steel 304 fastener has higher specific resistance. The specific resistance of stainless steel is higher than that of carbon steel by five times. Standard parts have an expansion factor. Through experiment, if the temperature is higher, the expansion factor of stainless steel 304 fastener will be improved definitely.
3. Stress capacity. Stainless steel 304 fastener can endure moderate stress. Although it cannot be compared favorably with high strength bolt, the fastener can still meet the common requirements.
4. Mechanical properties. High rust resistance and corrosion resistance have close relationship with the features of stainless steel. For standard parts developing constantly, mechanical properties of stainless steel 304 fastener will be enhanced further.
Mechanical properties of Stainless Steel 304 Fasteners
Typical Mechanical Properties for grade 304 Stainless Steel Fasteners
Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
---|---|---|---|---|---|
Rockwell B (HR B) max | Brinell (HB) max | ||||
304 | 515 | 205 | 40 | 92 | 201 |
304L | 485 | 170 | 40 | 92 | 201 |
304H | 515 | 205 | 40 | 92 | 201 |
304H also has a requirement for a grain size of ASTM No 7 or coarser. |
Screws, Bolts and Nuts from M6 - SS 304 Fasteners
Type | Grade | Property Class | Nominal Size | Bolts and Screws | Nuts | ||
---|---|---|---|---|---|---|---|
Minimum Tensile Strength N/mm² | Minimum Proof Stress N/mm² | Minimum Elongation at fracture mm | Proof Load Stress (sp) N/mm² | ||||
Austenitic | A1 A2 A4 | 50 | M6 - M39 | 500 | 210 | 0.6 x Nom. Dia. | 500 |
70 | M6 - M20 | 700 | 450 | 0.4 x Nom. Dia. | 700 | ||
80 | M6 - M20 | 800 | 600 | 0.3 x Nom. Dia. | 800 |
Chemical Composition of Stainless Steel 304 Fasteners
Typical compositional ranges for grade 304 Stainless Steel Fasteners
Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
N |
|
---|---|---|---|---|---|---|---|---|---|---|
304 | min. max. | - 0.08 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | - 0.10 |
304L | min. max. | - 0.030 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 12.0 | - 0.10 |
304H | min. max. | 0.04 0.10 | - 2.0 | - 0.75 | -0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | - |
Physical Properties of Stainless Steel 304 Fasteners
Typical physical properties for annealed grade 304 Stainless Steel Fasteners
Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C (J/kg.K) | Electrical Resistivity (n.m) |
|||
---|---|---|---|---|---|---|---|---|---|
0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
304/L/H | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
Stainless Steel 304 Fasteners Ready Stock At Riton Metal Industries
Type Of Stainless Steel 304 Bolts Available At Best Price
Type Of Stainless Steel 304 Nuts Available At Best Price
Type Of Stainless Steel 304 Screws Available At Best Price
Type Of Stainless Steel 304 Washers Available At Best Price
Available Grades Stainless Steel Fasteners Type
|
Available Grades Stainless Steel 304 Bolts Type
Available Grades Stainless Steel 304 Nuts Type
Available Grades Stainless Steel 304 Screws Type
Available Grades Stainless Steel 304 Washers Type
|
Our Specialization in Below Stainless Steel 304 Fasteners
|
|
|
Stainless Steel 304 Fasteners Price
- Bolt m20 Stainless steel bolt Bolt fastener
US $0.01-2 / Piece - High quality stainless steel screws and fasteners
US $0.01-0.1 / Piece - Stainless Steel Screw Hexagon Head Bolt Nut Fasteners
US $0.01-0.03 / Piece - duplex steel 2205,S32760 high quality stainless steel fasteners din standard hex bolt screw and fasteners
US $0.01-5 / Piece - stainless steel fasteners nuts bolts and washers
US $0.2-0.48 / Piece - Bolts and nuts/ Stainless steel screw/ fasteners
US $0.01-2 / Piece / Piece - Fasteners manufacturers stainless steel hex bolt
US $0.01-1 / Piece / Piece - 304 stainless steel fastenal catalog bolts and nuts m8
US $0.01-0.5 / Piece - Stainless Steel Solid 304 Flat Head Rivets Fasteners
US $0.15-0.35 / Piece - aisi 304 fasteners stainless steel bolts 410 m12
500 Pieces (Min. Order) - 304 Stainless steel fastener eye bolt
US $0.01-1 / Piece - high quality 304 stainless steel carbon steel wing nuts fastener screw and nuts
US $0.01-0.03 / Piece - 304L stainless steel fastenal catalog bolts and nuts m8
US $0.01-0.5 / Piece - Stainless Steel Solid 304L Flat Head Rivets Fasteners
US $0.15-0.35 / Piece - aisi 304L fasteners stainless steel bolts 410 m12
500 Pieces (Min. Order) - 304L Stainless steel fastener eye bolt
US $0.01-1 / Piece - high quality 304L stainless steel carbon steel wing nuts fastener screw and nuts
US $0.01-0.03 / Piece - fastener Stainless Steel 316 Stud bolt m16
US $0.1-0.2 / Piece - stainless steel 316 anchor screws and fasteners
100 Pieces (Min. Order) - Factory price 316 stainless steel fasteners and Fastener
US $0.01-1 / Piece - Best Selling Fastener aisi 316 m8*10 stainless steel stud bolt
US $0.02-0.45 / Piece - hardware fastener stainless steel 316 cup head bolt nut
US $0.01-0.1 / Piece - fastener Stainless Steel 316L Stud bolt m16
US $0.1-0.2 / Piece - stainless steel 316L anchor screws and fasteners
100 Pieces (Min. Order) - Factory price 316L stainless steel fasteners and Fastener
US $0.01-1 / Piece - Best Selling Fastener aisi 316L m8*10 stainless steel stud bolt
US $0.02-0.45 / Piece - hardware fastener stainless steel 316L cup head bolt nut
US $0.01-0.1 / Piece - M5 M6 M8 M10 Stainless Steel 317 321 Square Short Neck Carriage Bolt
US $0.1-5 / Piece - stainless SS 317 fasteners
US $0.5-100 / Piece - Stainless Steel 314 316 317 Flat Spot - Welding Bolt/Weld Bolt 304/316 Big Size Hex Bolt Plain Finish
US $550.0-550.0 / Piece - stainless steel 317 bolt and nuts
US $0.1-100 / Piece - AISI 317 Stainless Steel Stud
US $0.30-30 / Piece - M5 M6 M8 M10 Stainless Steel 317L 321 Square Short Neck Carriage Bolt
US $0.1-5 / Piece - stainless SS 317L fasteners
US $0.5-100 / Piece - Stainless Steel 314 316 317L Flat Spot - Welding Bolt/Weld Bolt 304/316 Big Size Hex Bolt Plain Finish
US $550.0-550.0 / Piece - stainless steel 317L bolt and nuts
US $0.1-100 / Piece - AISI 317L Stainless Steel Stud
US $0.30-30 / Piece - DIN approved 321 stainless steel fasteners and Fastener
US $0.01-1 / Piece - good quanlity Non-standard 321 stainless steel fasteners and screws
US $0.01-1 / Piece - Stainless Steel Fastener 321 Bolts
10 Pieces (Min. Order) - 1.4541 321 stainless steel m36 hex head bolt
US $0.01-0.1 / Piece - 321 Stainless steel Hex Nut
US $0-15 / Unit - 321 square lock washer and standard stainless steel spring washer
US $0.1-50 / Piece - 347,S34700,1.4550 stainless steel fastener DIN933 all thread hex bolts M6-M64.
US $0.1-10 / Piece - 347 STAINLESS STEEL BOLTS AND NUTS
US $0.1-100 / Piece - SS 347 stainless steel fasteners all threaded rod
US $0.1-10 / Piece - 347 Stainless steel machined nuts
US $0-1 / Piece - 347 stainless steel fastener hex socket head cap screw
US $0.1-10 / Piece - Fastener 347 stainless steel DIN127 spring washers M20
US $0.01-3 / Piece
Price List of Stainless Steel 304 Bolts
Price List of Stainless Steel 304 Nuts
Price List of Stainless Steel 304 Screws
Price List of Stainless Steel 304 Washers
SS 304 Fasteners Useful Info
Type 304- the most common grade; the classic 18/8 (18% chromium, 8% nickel) stainless steel. Outside of the US it is commonly known as “A2 stainless steel”, in accordance with ISO 3506 (not to be confused with A2 tool steel)
Stainless steel is also much less magnetic than regular steel fasteners though some grades will be slightly magnetic.
18-8 Stainless
18-8 refers to any stainless steel containing approximately 18% chromium and 8% nickel. This is the most common stainless designation for hardware.
Stainless Steel 304 Fasteners Surface Coating
- Stainless Steel 304 Fasteners Hot Dipped Galvanizing
- Stainless Steel 304 Fasteners Epoxy Coating
- Stainless Steel 304 Fasteners Electro Polished
- Stainless Steel 304 Fasteners Passivation
- Stainless Steel 304 Fasteners Zinc Plating
- Stainless Steel 304 Fasteners Chrome Plating
- Stainless Steel 304 Fasteners Mirror Buffed
- Stainless Steel 304 Fasteners Teflon Coating
- Stainless Steel 304 Fasteners Oxidized
Why Choose Riton Metal Industries While Buying Stainless Steel 304 Fasteners ?
- Government and Private Laboratory Testing
- Very quick delivery
- Mill test report/ Digital Mill test report in accordance with EN10204 NACE 3.1, NACE 3.2
- High pressure sustainability
- Test certificate from ISO 17025 Standards Laboratory
- Same day shipping of the goods
- Impeccable surface finish
- Product replacement warranty
- After sales support and service
- World class buying experience
- Highest stock in the country
- Stringent Quality Testing and Control
- 3rd Party inspection
Packaging & Shipping of Stainless Steel 304 Fasteners
Stainless Steel 304 Fasteners Packed |
Stainless Steel 304 Fasteners Packed |
---|
- Packaging
Stainless Steel 304 Fasteners Supply Area
We Supply Our Stainless Steel 304 Fasteners to various countries like Nigeria , Egypt , South Africa , Tanzania , Kenya , Mozambique , Angola , Gabon Germany , Turkey , France , United Kingdom , Italy , Netherlands , Iran , Iraq , Saudi Arabia , United Arab Emirates , Iisrael , Jordan , Oman , Kuwait , Qatar , Bahrain , Bangladesh , China , Indonesia , South Korea , Pakistan , Philippines , Singapore , Sri Lanka , Thailand , Vietnam , Brazil , Colombia , Argentina & United States of America - Fast delivery and best packaging
Our products like Stainless Steel 304 Fasteners are packaged to make sure that there’s no damage throughout transit. Just in case of exports, customary export packaging is completed in wooden boxes or cases. All Stainless Steel 304 Fasteners are marked with Trademark (Company’s LOGO), Grade, Size and Lot No. On requests we can do custom marking on our products. Stainless Steel 304 Fasteners Test Certificates.
Stainless Steel 304 Fasteners Application Industry
- SS 304 Fasteners Used In Fertilizers Industry
- SS 304 Fasteners Used In Aerospace Industry
- SS 304 Fasteners Used In Nuclear Power Plant Industry
- SS 304 Fasteners Used In Chemical Industry
- SS 304 Fasteners Used In Oil & Gas Industry
- SS 304 Fasteners Used In Refineries Industry
- SS 304 Fasteners Used In Petrochemical Industry
- SS 304 Fasteners Used In Paper Industry
Stainless Steel 304 Fasteners Salient features
• High tolerance• Static pressure
• Static pressure
• Dimensional preciseness
• Corrosion resistance
• Severe vibration under impulse pressure
• Long service life
• Study construction
• Perfect installation & application
Fasteners ASTM Grades
ASTM A193 Grade B5, ASTM A193 Grade B6, ASTM A193 Grade B7, ASTM A193 Grade B16, ASTM A193 Grade B8, ASTM A193 Grade B8C, ASTM A193 Grade B8M, ASTM A193 Grade B8T, ASTM A193 Grade B8, ASTM A193 Grade B8C, ASTM A193 Grade B8M, ASTM A193 Grade B8T, ASTM A320 Grade L7, ASTM A320 Grade L7A, ASTM A320 Grade L7B, ASTM A320 Grade LC7, ASTM A320 Grade L43, ASTM A320 Grade B8, ASTM A320 Grade B8C, ASTM A320 Grade B8T, ASTM A320 Grade B8F, ASTM A320 Grade B8M, ASTM A320 Grade B8, ASTM A320 Grade B8C, ASTM A320 Grade B8F, ASTM A320 Grade B8M, ASTM A320 Grade B8T, SAE J429 Grade 5, ASTM A449, SAE J429 Grade 5.1, SAE J429 Grade 5.2, ASTM A325 Type 1, ASTM A325 Type 2, ASTM A325 Type 3, ASTM A354 Grade BB, ASTM A354 Grade BC, SAE J429 Grade 7, SAE J429 Grade 8, ASTM A354 Grade BD, SAE J429 Grade 8.1, ASTM A490
We have supplied Stainless Steel 304 Fasteners to below countries
To buy Stainless Steel 304 Fasteners At best price & urgent delivery please mail to info@ritonmetalind.com , As we have Our Dealer, distributors & direct sales representatives in below countries who will help you to buy Stainless Steel 304 Fasteners & will resolve your queries on SS 304 Fasteners.
Malaysia | Angola | Netherlands |
Nigeria | Gabon | Iran |
Egypt | Germany | Iraq |
South Africa | Turkey | United Arab Emirates |
Tanzania | France | israel |
Kenya | United Kingdom | Jordan |
Algeria | Italy | Oman |
Uganda | Philippines | Kuwait |
Ghana | Singapore | Qatar |
Mozambique | Sri Lanka | China |
Morocco | Thailand | Indonesia |
Saudi Arabia | Vietnam | Japan |
Canada | United States | Pakistan |
Mexico |
Stainless Steel 304 Fasteners Inventory