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2.2 2.9 3.5 B8 B8m B8t Astm A453 Gr660 A286 Cross Recessed Pan Head Tapping Screws And Plain Washer
Product Description
These miniature tapping screws (diameters 2.2mm, 2.9mm, 3.5mm) are designed for extreme high‑temperature service. The material conforms to ASTM A193 (B8, B8M, B8T) or ASTM A453 Grade 660 (A286 superalloy). These alloys retain significant strength up to 650‑700°C while resisting oxidation and creep. The screw has a cross recessed pan head and a plain flat washer (same material) pre‑assembled. The tapping thread cuts its own mating thread into metal sheet or cast holes, eliminating pre‑tapping. Typical applications include exhaust systems, furnace components and turbine accessories.
Applications
Industry
Usage
Automotive
High-strength applications in engines, heavy-duty machinery, and bridge construction
Mechanical
Connecting mechanical parts, circuit boards, engines, transmissions in various industries
Energy
Connecting power generation equipment and transmission lines
Architectural
Building structures, shipbuilding, and petrochemical equipment
Automotive exhaust manifolds and catalytic converter shells – temperatures up to 800°C (A286).
Industrial kilns and burners – fixing refractory liners, thermocouple sleeves.
Gas turbines and turbocharger housings – high‑temperature bolting.
Multiple alloy options – B8M for chloride‑rich high‑temp environments, B8T for sensitisation resistance.
Company Information
Frequently Asked Questions
Q: Are you trading company or manufacturer?
A: We are factory and OEM are available.
Q: How long is your delivery time?
A: Generally 7-10 days if in stock, or 15-20 days if not in stock (depending on quantity).
Q: Do you provide samples? Is it free or extra?
A: Yes, we offer free samples but customers pay the freight cost.
Q: What are your payment terms?
A: 30% T/T in advance, balance before shipment or L/C.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Seller
Year Established:
2007
Total Annual:
15000000-20000000
Employee Number:
100~200
Ecer Certification:
Verified Supplier
Hunan Jiashan Hardware Tech as a branch company of J AND R METALWORK,established in 2007 and located in Changsha, Hunan, China.After almost 17 years management development and technical improvement, Jiashan is willing to be a leading supplier in hardware industry. Meanwhile, we are one of member of ... Hunan Jiashan Hardware Tech as a branch company of J AND R METALWORK,established in 2007 and located in Changsha, Hunan, China.After almost 17 years management development and technical improvement, Jiashan is willing to be a leading supplier in hardware industry. Meanwhile, we are one of member of ...