Parafusos longos

Fabricante de parafusos personalizados

Fixador de calor

Parafusos longos


Heatfastener is a professional long screws, custom screw, bolts, nuts, and other custom fasteners manufacturer and supplier in China, With over 23years of industry experience, The company has been working to solve the production of non-standard screw parts which are unable to be produced by other fastener manufacturers. We are specializing in SEMS screws, security screws, micro screws, set screws, Chicago screws, Shoulder screws, etc. Custom bolts include carriage bolts, hex bolts, eye bolts, expansion bolts, Flang bolts, etc. Nuts include hex nuts and more.

Com certificação ISO9001:2008, iso14001:2004, e especialmente IAFT16949:2009 para a indústria automóvel. Heatfastener oferece parafusos totalmente personalizados e parafusos de acordo com suas necessidades. Nós podemos trazer seu projeto de fixador para a realidade, e tudo de acordo com suas necessidades.

extra long screws

Long Screws Details

Parafusos longos, ou Long bolts, you may think it is Lag screws, also called lag bolts, are large wood screws. but actually, it is not just lag screws. they can come with different threads, head types, drive types. Screw length normally typically long, so we call them as long screws

We also manufacture our long screws and bolts with Phillips, socket cup, slotted drives. etc, We can also supply them with customized if you have your special requirements and application. We can also manufacture these items in special materials and custom made as below listed:


  • Aço inoxidável - SS302, SS304, SS316, (boa tenacidade),Aço inoxidável A2 A4
  • Aço - C45(K1045), C46(K1046),C20
  • Latão - C36000 ( C26800), C37700 ( HPb59), C38500( HPb58),C27200CuZn37), C28000(CuZn40)
  • Bronze-C51000, C52100, C54400, etc
  • Alumínio - Al6061, Al6063 etc
  • Aço carbono – C1006,C1010,C1018,C1022,C1035K,C1045
  • Liga de aço - SCM435,C10B21,C10B339
  • Outros materiais- Titânio, UNS C11000 Cobre, silício


  • Grau: Grau 4.8, Grau 6.8, Grau 8.8, Grau10.9, Grau12.9, etc.
  • Padrão:GB,DIN,ISO, ANSI/ASTM,BS,BSW,JIS, Métrico, Polegada
  • Acabamento:Liso, H.D.G, Óxido preto, Cromo, Teflon, dacromet, Anodizado, Com nylok
  • Certificados: ISO9001:2015, ISO14001:2015,IATF16949, ROHS
  • Feito à medidaOEM está disponível, de acordo com os requisitos do cliente

Head type:

  • Plano: Acountersunk head with a flat top,abbreviated FH
  • Oval:Acontersunk with a rounded top,abbreviated OH or OV
  • Panela:A slightly rounded head with short vertical sides abbreviated PN
  • Treliça: An exra wide head with rounded top
  • Rounded:A domed head abbreviated RH
  • Hex: A hexagonal head abbreviated HH or HX
  • Socket Cap:A samll cylindrial head using socket drive
  • Botão:A low profile rounded head using a socket drive
  • Hex Washer: Ahex head with bulit in washer
  • Slotted Hex Wahser:A hex head with built in washer and a slot.

Tipo de acionamento:

  • Phillips and Frearson:A X shaped drive abbreviated PH
  • Slotted:A lot in the head,abbeviated SL
  • Combination:A combination of slotted and Phiilips drives,Abbreviated combo
  • Socket,Hex or Allen:A hexagonal hole for use with an Allen wrench
  • One Way: Intalls with a normal slotted driver but can not be removed without special tools
  • Square:Also known as rebertson drive.Abbreviated SQ or SD
  • Torx: A six pointed star pattern,specially designed to prevent cam out and stripped head


Long screws as a specialty fastener have a wide application, like New energy vehicles, equipment, chassis engines, motorboats, Fire fighting equipment, LED Lamps, Aviation equipment, and other application fields. and for extra long screws, you can also see they are sued in for outlet covers, electrical sockets, for door hinges, for outlets, for sockets, for plug sockets, and light switches

Além disso, os nossos parafusos, cavilhas e parafusos personalizados são amplamente utilizados nas seguintes indústrias

  • Eletrónica
  • Petroquímica
  • Produtos de consumo
  • Transporte
  • Agricultura
  • Máquinas pesadas
  • Construção
  • Automóvel
  • Médico
  • Militar
  • Aeroespacial
  • Petróleo e gás

Types of Long Screws

Long screws are kind of custom screws, just because the length can be extra long as what we need.


Use a longer screw. The extra length can help make up for a less than perfect pilot hole and boost grip. When it comes to screws, simpler is better

Heatfastener is good at manufacturing extra-long screws, can be customized dimension size from 1MM-1990MM.length can be 70mm,80mm,90mm,100mm,110mm,120mm,130mm,145mm,200mm, 300mm,450mm,500mm 4″,12″ 10″ etc,Thread size can be M3,M4,M5,M6,M8,M10,M12,M16,M20,can screws head,type,thread,length can be made made from Heatfastener

Precisa de parafusos personalizados para a sua indústria?

Como fabricante com 20 anos de experiência na indústria e com uma fábrica equipada com máquinas de precisão, podemos fornecer, desde a consulta até à produção, uma solução única para si.

Sobre nós

Shenzhen Heat Hardware Co., Ltd é um fabricante líder de parafusos personalizados na China, fundado em 2000 anos. Somos especializados em parafusos personalizados, parafusos de segurança, parafusos Sems, parafusos Chicago, parafusos de solda, parafusos longos, micro parafusos, parafusos de polegar, parafusos de ajuste, parafusos personalizados, parafusos de carro, porcas e outros fixadores personalizados. Com mais de 20 anos de experiência no sector. Atendemos mais de 20000 clientes, incluindo a indústria aeroespacial, indústria automotiva, eletrônica, produtos mecânicos e elétricos, robôs, indústria médica, indústria de comunicações, produtos esportivos ao ar livre, aparelhos inteligentes, etc. podemos fornecer um serviço personalizado de fixador único para você, não importa o tipo de fixador personalizado que você precisa.

Perguntas mais frequentes

A long-bolt or through-bolt engine is an internal combustion piston engine where, following usual practice, the cylinder head is held down by bolts or studs. Conventionally the cylinder head is bolted to the cylinder block and the crankshaft main bearings are in turn bolted to the crankcase by separate bolts.

Use a standard vernier caliper to measure. Do not use a tape measure for measurements, it is easy to make mistakes and get the wrong figure

A standard vernier caliper and make positive and negative tolerances can be accurate to 0.01mm, but tap makes positive and negative tolerance rang 1mm-2mm

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