Although stainless steel alloys tend to have high strength and superior resistance to corrosion, it is possible to increase these properties by use of surface treatment. For instance, the Lag Bolts manufacturer in India could galvanize them in order to improve their toughness as well as their resistance to corrosion. The main difference between any type of galvanized vs stainless steel lag bolts is that the former has a coating of zinc layered on its surface.
In comparison to electroplating, bolts that are galvanized have a higher degree of protection because the 3/8 stainless steel lag bolts that have been processed by galvanization receive a much thicker coat of finish as opposed to a thinner coat in electroplating. Moreover, the zinc coat applied to these components improves not only its hardness but also improves the stainless steel lag bolt strength, while coating the fastener to prevent contact with corrosive media. Galvanizing the material has an advantage that the component, or in this case the 1/2 x 6 stainless steel 316 lag eye screw will not get easily corroded, especially by oxidation, which is the most common cause of corrosion.
However, the rate of oxidation could be further brought down by the use of an alloy grade to produce a 1/2 x 6 stainless steel lag eye bolt that has a significantly higher content of chromium. One such alloy is grade 316, which has a content of 16.5% chromium its total alloy weight. The chromium content of more than 14% in stainless steel lag eye bolt with ring can form a thick passivate oxide layer which protects the fasteners from oxidation corrosion.
Lag Bolts
| standards of British | BS 57 |
|---|---|
| standards | ISO 7045, DIN 7985, DIN 571 |
| Length | 1.2 milimeter, 2 milimeter, 45 milimeter, 1 milimeter |
| Size |
M16, M5, M33, (M3.5), (M45), M20, M42, M4, (M22), (M27), (M14), M6, (M18), M36, M48, M12, M2, M3, M10, M24, M30, M8 M160 and as per need |
| Standard: |
all International Standards and ASTM, ANSI , ISO, DIN, GB, JIS, BS, IS |
| Threads | BSW, METRIC, UNC, BSF, UNF or as per need |
| UTS | UNF, NPT, UNC, UNS, UNEF, NPTF |
| DIN Standard | DIN 7981, DIN 931, B.S. DIN 933, DIN 912, DIN 934, DIN 603, DIN 970, DIN916, DIN 7982, DIN 7985, DIN 913, DIN 6923, |
| Tolerance | +/- 00.01 millimeter to +/- 00.05 millimeter |
| Dimensions of socket head bolts | ASME B18.6.3:: shorter are fully threaded and 6 inches screws |
| Type | Round/ Pan/ Truss head/ Hex Head/ Oval |
| Drive | Phillips/Slot, Phillips, Slotted, Six-Lobeetc |
| Finishing |
|
| Head | flat, hex, oval, phillips,Pan head |
| process of Production | Cold Heading, Wire Drawing, Heat Treatment, Insert tapping, Inspection, Packing, Surface Plating |
| Finish | ASTM A380/A380M |
| Manufacturers | GKW, SPAX® Screws, Kundan, Unbrako, Sundaram Precision, APL, EBY Fastener , Infasco Etc. |
| treatment of Surface |
|
| Uses | Wind tower, Railway, Automotive industry, Nuclear power, Electronic industry, Construction |
| Certificate provided |
|
| Description | lag bolts Price |
| Stainless Steel Lag Eye Bolt | US $ 0.6 / Piece |
| Lag Bolt 8.8 Fastener Round Head Carriage Bolt M12 | US $ 0.01-0.04 / Piece |
| M8 Lag Bolt 10mm Hex Bolt 4.8 |
US $ 0.01-0.04 / Piece Min. Order: 10 Pieces |
| Customized Stainless Steel Penta Head Wood Coach Screws Lag Bolts | US $ 0.01-0.1 / Piece |
| Zp ASME B18.2.1 Mild Steel Lag Bolts |
US $ 0.1-5 / Piece |
| Full Thread Half Thread Lag Bolt Stainless Steel | Min. Order: 10000 Pieces |
| DIN571 Hex Head Lag Screw Wood Screw Lag Bolt with Zinc Plated | US $ 0.008-0.009 / Piece |
| SS304/Stainless Steel 304 A2-70 Hex/Hexagon Head Wood Coach Screws Lag Bolts | US $ 850 / KG |
| Stainless Steel DIN580 Lifting Ring Lag Screw Eye Bolt |
US $ 0.5-0.8 / Piece |
| Carbon Steel Mushroom Head Big Lag Bolt | US $ 5 / Piece |
| Nominal Size | Head Width | Threads per Inch |
Head Height |
||
|---|---|---|---|---|---|
| Across Corners |
Across Flats |
||||
| Decimal | Fraction | Avg | Basic | Basic | |
| 0.3125 | 5/16 | 9/16 | 1/2 | 9 | 7/32 |
| 0.2500 | 1/4 | 1/2 | 7/16 | 10 | 11/64 |
| 0.4375 | 7/16† | 45/64 | 5/8 | 7 | 19/64 |
| 0.3750 | 3/8 | 41/64 | 9/16 | 7 | 1/4 |
| 0.6250 | 5/8 | 1 1/16 | 15/16 | 5 | 27/64 |
| 0.5000 | 1/2 | 27/32 | 3/4 | 6 | 11/32 |
| 0.7500 | 3/4 | 1 17/64 | 1 1/8 | 4 1/2 | 1/2 |
| Nominal Screw Size | Nominal Screw Length | |
| Over 6 in | Up to 6 in | |
| Over 1/2 | +/- 0.25 | +/- 0.25 |
| 1/2 and smaller |
+/- 0.25 | +/- 0.12 |
| Bolt Size | Pilot Hole Size | |||
|---|---|---|---|---|
| Body | Threaded Section | |||
| Medium Wood Group II |
Soft Wood Groups III & IV |
Hard Wood Group I |
||
| 5/16 | 5/16 | 3/16 | 9/64 | 13/64 |
| 1/4 | 1/4 | 5/32 | 3/32 | 3/16 |
| 7/6† | 7/16 | 9/32 | 13/64 | 19/64 |
| 3/8 | 3/8 | 15/64 | 11/64 | 1/4 |
| 5/8 | 5/8 | 13/32 | 5/16 | 29/64 |
| 1/2 | 1/2 | 5/16 | 15/64 | 11/32 |
| 3/4 | 3/4 | 1/2 | 13/32 | 9/16 |
There is no distinction between lag bolts and lag screws. Both are called lag screws. Longer screws or bolts have space between the head and the threads that are known as a shoulder. Bolts are a kind of affixing with threads that can be utilized with a nut.
Screw Diameter |
Threads per Inch |
Head Height (H) | Width Across Flats (F) | Washer Diameter (C) | Washer Thickness | Major Diameter | |||||
| Minimum | Maximum | Minimum | Maximum | Minimum | Maximum | Minimum | Maximum | Minimum | Maximum | ||
| 5/16 | 9 | .200 | .230 | .429 | .437 | .610 | .625 | .050 | .060 | .298 | .324 |
| 1/4 | 10 | .172 | .190 | .429 | .437 | .610 | .625 | .050 | .060 | .237 | .260 |
| 5/16-High Head | 9 | .300 | .312 | .429 | .437 | .610 | .625 | .050 | .060 | .298 | .324 |
| LENGTHS | #3 | #2 | #5 | #4 | #8 | #6 | #12 | #10 | 5/16″ | 1/4″ | 3/8″ |
| 1/8 | 0.055 | 0.040 | 1.01 | 0.070 | — | 1.04 | — | — | — | — | — |
| 3/16 | 0.070 | 0.050 | 1.02 | 0.090 | 2.05 | 1.05 | — | 3.09 | — | — | — |
| 1/4 | 0.080 | 0.060 | 1.04 | 1.000 | 2.08 | 1.07 | 5.06 | 4.03 | — | 8.05 | — |
| 5/16 | 0.090 | 0.060 | 1.05 | 1.020 | 3.01 | 1.09 | 6.01 | 4.06 | 16.07 | 9.01 | — |
| 3/8 | 0.090 | 0.070 | 1.07 | 1.030 | 3.04 | 2.01 | 6.05 | 5.00 | 17.07 | 9.08 | 29.02 |
| 7/16 | 1.000 | 0.080 | 1.09 | 1.050 | 3.06 | 2.02 | 6.09 | 5.04 | 18.08 | 10.04 | 30.07 |
| 1/2 | 1.010 | 0.080 | 2.00 | 1.060 | 3.09 | 2.04 | 7.04 | 5.08 | 19.08 | 11.01 | 32.02 |
| 9/16 | 1.020 | 0.090 | 2.02 | 1.070 | 4.02 | 2.06 | 7.08 | 6.02 | 20.09 | 11.07 | 33.06 |
| 5/8 | 1.030 | 1.000 | 2.03 | 1.080 | 4.05 | 2.08 | 8.03 | 6.06 | 21.09 | 12.04 | 35.01 |
| 3/4 | 1.050 | 1.010 | 2.06 | 2.010 | 5.00 | 3.02 | 9.02 | 7.03 | 24.00 | 13.06 | 38.00 |
| 7/8 | 1.070 | 1.030 | 3.00 | 2.030 | 5.06 | 3.05 | 10.01 | 8.01 | 26.01 | 14.09 | 41.00 |
| 1″ | 1.090 | 1.040 | 3.04 | 2.050 | 6.02 | 3.09 | 11.00 | 8.09 | 28.08 | 16.01 | 44.00 |
| 1-1/8″ | 2.000 | 1.050 | 3.08 | 2.080 | 6.07 | 4.03 | 11.09 | 9.06 | 30.02 | 17.04 | 47.00 |
| 1-1/4″ | 2.020 | 1.060 | 4.01 | 3.000 | 7.03 | 4.06 | 12.08 | 10.04 | 32.03 | 18.07 | 49.08 |
| 1-1/2″ | 2.050 | 1.080 | 4.07 | 3.050 | 8.03 | 5.03 | 14.07 | 11.09 | 36.05 | 21.02 | 55.08 |
| 1-3/4″ | 2.090 | 2.010 | 5.03 | 4.000 | 9.04 | 6.01 | 16.05 | 13.05 | 40.07 | 23.07 | 61.07 |
| 2″ | 3.030 | 2.040 | 6.00 | 4.050 | 10.06 | 6.08 | 18.03 | 15.00 | 44.08 | 26.02 | 67.06 |
| 2-1/4″ | 3.060 | 2.060 | 6.07 | 5.000 | 11.08 | 7.06 | 20.01 | 16.06 | 19.00 | 28.08 | 73.05 |
| 2-1/2″ | 3.090 | 2.080 | 7.03 | 5.050 | 12.09 | 8.03 | 22.00 | 18.01 | 53.02 | 31.03 | 79.05 |
| 2-3/4″ | 4.030 | 3.010 | 7.09 | 6.000 | 13.09 | 9.01 | 23.08 | 19.07 | 57.03 | 33.09 | 85.03 |
| 3″ | 4.070 | 3.040 | 8.06 | 6.050 | 15.00 | 9.08 | 25.06 | 21.02 | 61.05 | 36.04 | 91.03 |
| Description | length | diameter |
| 1/4 X 1 Zinc Plated Carbon Steel Hex Lag Screws | 1 | 1/4 |
| 1/4 X 1 Galvanized Carbon Steel Hex Lag Screws | 1 | 1/4 |
| 1/4 X 1 1/2 Zinc Plated Carbon Steel Hex Lag Screws |
1 1/2 | 1/4 |
| 1/4 X 1 1/4 18-8 Stainless Steel Hex Lag Screw | 1 1/4 |
1/4 |
| 1/4 X 1 3/4 18-8 Stainless Steel Hex Lag Screw |
1 3/4 | 1/4 |
Material |
Grades |
ASTM Standards |
|---|---|---|
Alloy Steel |
B 7/ B 7M, B 6, 2, B 16, 2H, 2HM, B 7, GR 6, B 7M |
ASTM A 194/193 / ASME SA 194/193 GR |
Nickel Alloy |
UNS 8020 (ALLOY 20 / 20 CB 3), UNS 4400 (MONEL 400), UNS 2200 (NICKEL 200) , UNS 6600 (INCONEL 600) , UNS 8825 (INCONEL 825), UNS 10276 (HASTELLOY C 276), UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 2201 (NICKEL 201) |
ASTM / ASME SB 164 /160 / 166 /425 / 574 / 446 / 472 |
Stainless Steel |
B 8C (SS 347), A 4, B 8 (304), A 2, B 8 T (SS 321), (SS 316) B 8M |
ASTM A 194/193 / ASME SA 194/193 |
Duplex Steel |
LENGTH: 5 METERS, size Range: M10 - M100 |
UNS NO. S32205, S31803 |
High-Temprature Alloys |
19-9 DL, Discaloy, A286, Nimonic 80, Titanium, Haynes 25, Mulitmet, 16-25-6, Unitemp 252, Greek Ascalloy, Rene 41, Udimet 500, Inco 901, Inco 700, 235, Hastelloy X, RA 330, Waspaloy | |
Finish: |
Zinc Plating, Black Oxide, Hot Dip Galvanized | |
Trademarks: |
Armco, Carpenter, DuPont, Cabot, INCO | |
Nonmetallic Materials: |
Kel-F, Acrylic, Lexan, Poly Vinyl Chloride, Polypropylene, Zytel 31, 105, 101, Teflon | |
Aluminum Alloys: |
5052, 2024, 3003, 2011, 6061, 2014, 6053, 7075, 2017, 1100 | |
Copper Base Alloys |
Silicon A and B, Free-cut, Yellow, Naval, Red, Bronze: Phosphor, Commercial, Aluminum, Manganese, Silicon-Aluminum, Munitz Metal, Ampco Alloys, Cupro-Nicles | |
| Dammam -KSA, Philippines, Indonesia, Belgium | 316 Stainless Steel Wood Screws Hex Head Lag Bolts |
| Qatar, Europe, France, Thailand | Carbon Steel Mushroom Head Big Lag Bolts Round Head Big Bolts |
| Czechia, Thailand, Germany, Malaysia | DIN603 Ss 304 Square Head / Mushroom Head Lag Bolts |
| Malaysia, Bangladesh, USA, Finland | Zinc Plated Steel Lag Screw Eye Bolts with Nut, Eyelet Bolts |
| South Africa, Kuwait, Saudi Arabia (KSA), Brazil | Grade2/A307 Gr. a Hex Lag Bolts |
| Bahrain, Singapore, South Africa | Long Carbon Steel Hex Lag Screw |
| Philippines, UK, Australia, Nigeria | Galvanized Wood Screw DIN 571 Lag Bolts |
| Oman, Hong Kong, Malaysia, UAE | Mild Steel Hex Lag Bolts |
| Chile, Iran, Italy, Singapore | Stainless Steel 304 Lag Bolts |
| United Arab Emirates (UAE), Norway, Turkey, Malaysia | Stainless Steel Lag Eye Bolts |
| Netherlands, Russia, Malaysia, Dubai | Zinc Plated Steel Hex Head Lag Bolts |
| Egypt, Mexico, Spain, UK | Stainless Steel Lag Ring Bolts |
| United Kingdom -UK, Malaysia, Europe, UAE | High Strength DIN571 Zinc Plated Lag Bolts |
| UK, Poland, Canada, Ellington -United States | 10.9 Carbon Steel DIN 571 Zinc Plated Hex Lag Bolts |
| Philippines, Canada, Malaysia, Singapore | Carbon Steel Mushroom Head Big Lag Bolts |
| Europe, Romania, Japan, Malaysia | Stainless Steel Wood Screw Lag Thread Swivel Bolts Eye Bolts |
| Sweden, Malaysia, Colombia, China | Galvanized Hex Lag Bolts |
| Malaysia, Los Alamos -Mexico, Taiwan, Philippines | Stainless Steel Square Lag Bolts |
| Singapore, NY 12203 (USA), South Korea, Malaysia | Custom Nut Hexagon Lag Stainless Steel Flange Bolts |
|
|
