extra long carriage bolts

is a professional R & D and production of screws, nuts, non-standard fasteners and other metal stampings. We have the perfect after-sales service network, and can provide the most convenient service on demand. Annually, Tengri can be completed very large orders, but also get a lot of good partners.

304/A2 316/A4 stainless steel 7:Standard :DIN ,ISO ,JIS ,AS ,BS,IFI High quality raw materials, standardized producing line We have formed an integrated process flow about testing raw materials, including chemical Component Analysis, mechanical property, and vision and so on. Ensuring product quality Strictly testing per lot In order to guarantee high quality and precision of the products, the company is equipped with professional testing machines: kinds of measuring tools, hardness machine, X-RAY Thickness Tester, salt spray machine, Tension machine, and so on. ensuring that all products will be completely inspected according to various operation standards and the products of the company have high quality in the whole world.

JM spends labor costs in making samples , therefore charges certain sample fees. Yes, for the standard fastener,if on stock,we can provide free samples. But if you need samples confirming, charging the sample fee, and refund it when make the order. Q 9 .

JM spends labor costs in making samples , therefore charges certain sample fees. Yes, for the standard fastener,if on stock,we can provide free samples. But if you need samples confirming, charging the sample fee, and refund it when make the order. Q 9 .

2. Our Engineer has 30 years experience in designing , developing and producing screws. 2. We use high-quality austenitic stainless steel and raw materials from different countries . Q3,Could you provide free samples9 A3 : We have more than 6000 models of customized products in stock.