VEDALI HARDWARE CO., LTD
VEDALI HARDWARE CO., LTD Professional Hardware Supplier Perfect Engineering Solutions
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Zinc Steel Hex Head Lag Screw for Wood Plasitc ASME B18.2.1 Fastener
We provide assorted specifications hex lag screws from M4 to M10 based on DIN 571 standard , and ASME B18.2.1 as well for wide requests in various fields .
Hex head lag bolt with coarse threads and sharp point , it is applied to securing heavy wooden part to another part or concrete or masonry part . property class from 4.8 to 8.8 .
Specific Specifications for Lag Screws 
DIN 571
| d | 4 | 5 | 6 | 7 | 8 | 10 |
| H | 3 | 3.5 | 4.0 | 5.0 | 5.5 | 7.0 |
| ds | 4 | 5 | 6 | 7 | 8 | 10 |
| 3.52 | 4.52 | 5.52 | 6.42 | 7.42 | 9.42 | |
| s | 7 | 8 | 10 | 12 | 13 | 17 |
ASME B18.2.1
| d | k | ds (max) | s | P |
| NO.10 | 1/8 | 0.199 | 9/32 | 0.091 |
| 1/4 | 11/64 | 0.260 | 3/8 | 0.01 |
| 5/16 | 13/64 | 0.324 | 1/2 | 0.111 |
| 3/8 | 1/4 | 0.388 | 9/16 | 0.143 |
| 7/16 | 19/64 | 0.452 | 5/8 | 0.143 |
| 1/2 | 21/64 | 0.515 | 3/4 | 0.167 |
| 5/8 | 27/64 | 0.642 | 15/16 | 0.200 |
| 3/4 | 1/2 | 0.768 | 1-1/8 | 0.222 |
| 7/8 | 19/32 | 0.895 | 1-5/16 | 0.250 |
| 1 | 21/32 | 1.022 | 1-1/2 | 0.286 |
| 1-1/8 | 3/4 | 1.149 | 1-11/16 | 0.308 |
| 1-1/4 | 27/32 | 1.277 | 1-7/8 | 0.308 |
Materials for Lag Screws
Stainless steel : SUS 201 , SUS303 , SUS 304 ,SUS 316 , SUS 416 ,SUS 430 and SUS 420
Carbon steel : 1008 , 1010 , 1018 , 1022 , 1035 , 1045 , SCM 435 and 40CRO
Aluminum : 2024 , 6061 and 7075
Brass : CuZn35 , CuZn37 , CuZn40 , CuZn37Pb1 and CuZn39Pb1
Finishing for Lag Screws
Zinc
The most popular plating for the most products , making parts are bright and smooth and resistant corrosion
Nickel
The film thickness is 1～3μm , it improves brightness and wear resistance . it is for the most items .
Polishing
Reduce roughness of parts and improve brightness . is workable for the most metal parts in industry .
Tin finish
With film thickness 0.13～1.27μm , tin finish with bright surface and good ductility ,corrosion resistance ,lower melting point ,eco-friendly features . and is used for electronics .
Brass finish
Usually, 5gm～8gm finish coating thickness and with good dispensability ,Bright appearance .
Dacromet
This finish is grey color with High corrosion resistance , No hydrogen embrittlement ,Heat resistance ,Easy to plated more ,eco-friendly etc .
Chrome
Chrome finish is silver white color and the thickness of film is 0．25～0．5μm normally . chrome finish has many practical Features like Bright appearance ,Wear resistance ,Corrosion resistance ,Hard plating film ,Heat resistance .
Applications for Lag Screws
Lag screws are used for heavy wooden parts like beam ,wooden block .
Features for lag screws
◆ Wider threads
◆ Fast cutting performance
◆ Harden material
◆ Perfect security
◆ Eco-friendly