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DIN 961 fine thread hex bolts factory

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DIN 961 fine thread hex bolts factory

XZ Fastener manufactures DIN 961 fine thread hex bolts for buyers who need full-thread metric fine pitch fastening with stable dimensions and controlled production records. These bolts are commonly selected when the joint requires fine pitch engagement through most of the shank, accurate assembly with matching nuts or tapped holes, and repeatable performance across batches. Orders can be produced in carbon steel, alloy steel, or stainless steel, with finishes chosen for indoor, outdoor, or equipment service. For factory supply, the important details are diameter, pitch, length, strength class, coating thickness, packing, and inspection requirements.

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DIN 961 fine thread hex bolts factory product illustration

Quick Specs

СтандартDIN 961, metric fine pitch, hex head, full thread
Strength8.8, 10.9, 12.9, and other classes available upon request
МатериалCarbon steel, alloy steel, stainless steel 304/A2 and 316/A4
FinishPlain, zinc plated, black oxide, hot dip galvanized, zinc flake, passivated
ПриложениеMachinery, automotive assemblies, tapped holes, brackets, and equipment joints

What Buyers Should Know Before Sourcing DIN 961 Fine Thread Hex Bolts

DIN 961 is often confused with other hex bolt standards because the head shape looks familiar. The important difference is the fine pitch full-thread design. For factory production, the pitch, thread length, and nut fit must be confirmed before mass production starts.

Buyers should compare the requirement with the DIN and ISO fastener standards guide and make sure the purchase order does not simply say “hex bolt.” Fine thread bolts are sensitive to coating buildup, especially when the order includes zinc plating, zinc flake, or hot dip galvanizing.

Factory note: If the bolt will be used in a tapped hole, ask the assembly team to confirm the exact metric fine pitch before production. A correct diameter with the wrong pitch is still a rejected part.

Common Purchasing Descriptions

Factory buyers often source DIN 961 items together with related metric hex bolt lines. XZ Fastener can review purchase descriptions that include DIN 933 full thread hex bolts, Grade 8.8 carbon steel hex bolts, metric hex head bolts, zinc plated DIN 933 bolts, black oxide DIN 933 bolts, and hot dip galvanized DIN 933 bolts.

Common Description What the Factory Should Confirm
DIN 961 M10 x 1.25 x 40 Class 8.8 zinc plated Full thread, fine pitch, plating thickness, head marking, and carton quantity
DIN 961 M12 x 1.25 x 50 Class 10.9 black oxide Heat treatment, hardness range, black finish condition, and thread gauge result
DIN 961 fine thread bolts with matching nuts Nut pitch, nut grade, coating compatibility, and fit after finish
DIN 961 assorted metric fine pitch factory order Size table, batch quantity, labeling, inspection documents, and pallet plan

For nearby product families, review XZ Fastener industrial bolts and standard fasteners.

Detailed Specifications Table

Specification Item Typical Options Factory Control Point
Стандарт DIN 961 Confirm full-thread fine pitch requirement against drawing and purchase order
Тип резьбы Metric fine pitch, full thread Use pitch gauge and go/no-go thread gauge according to order requirement
Diameter and Length Common metric sizes supplied according to buyer size list Measure length under head and confirm full-thread form
Strength Class 8.8, 10.9, 12.9; other classes on request Control raw material, heat treatment, tensile strength, proof load, and hardness
Материал Carbon steel, alloy steel, stainless steel A2 or A4 Confirm material certificate and chemical composition if requested
Finish Plain, zinc plated, black oxide, hot dip galvanized, zinc flake, passivated Check appearance, coating thickness, and thread fit after surface treatment
Packing Bulk cartons, small boxes, export pallets, buyer label Confirm part number, lot number, carton weight, and pallet marks

Material and Grade Explanation

Class 8.8 carbon steel is common for general industrial use. Class 10.9 and 12.9 are selected when higher tensile performance is required, but they should be matched with suitable nuts, washers, lubrication, and tightening practice.

Stainless steel A2 and A4 can be supplied for corrosion-resistant assemblies. A4 is usually preferred for outdoor, marine-adjacent, or chemical exposure. For heavy-duty programs, buyers may also compare XZ Fastener high-strength fasteners.

Surface Finish Selection Guide

Finish Typical Use
Plain Indoor assembly, oil protection, or parts requiring later treatment
Zinc Plated General corrosion protection with clean appearance
Black Oxide Machinery appearance requirement, normally with light oil protection
Hot Dip Galvanized Outdoor service where thicker corrosion protection is specified
Zinc Flake Controlled corrosion performance with closer thread-fit management

For coating-sensitive parts, review available coated fasteners before confirming the order.

Manufacturing and Quality Control

DIN 961 production requires careful control of thread rolling, heat treatment, finish, and final fit. For fine thread parts, a small pitch mistake can create assembly failure even when the bolt looks acceptable in a carton.

  1. Review the drawing, size list, fine pitch, grade, finish, and packing requirement.
  2. Confirm raw material and heat treatment route before production.
  3. Control head forming, thread rolling, and length under head during process checks.
  4. Inspect pitch, full thread form, hardness, dimensions, marking, and surface finish.
  5. Check thread fit after coating, especially when nuts are supplied with the bolts.
  6. Pack by size, lot number, carton quantity, and export pallet requirement.

When the order includes matching components, XZ Fastener can also discuss compatible industrial nuts.

Приложения

DIN 961 fine thread hex bolts are used where full-thread engagement and fine pitch control are required. They are not a general substitute for coarse-thread bolts; the selection should follow the assembly drawing or engineering specification.

  • Machinery and equipment assemblies using tapped holes
  • Automotive and transport applications requiring metric fine pitch bolts
  • Brackets, covers, housings, and adjustment points
  • Flange and plate assemblies with controlled thread engagement
  • Maintenance stock where exact pitch labeling is important

For broader supply planning, buyers can review XZ Fastener fastener products.

How to Get a Faster Quotation

A complete request helps the factory quote correctly and reduces the risk of wrong-pitch production. For DIN 961 bolts, always show diameter, pitch, and length together.

Information Needed Example
Size and Pitch M10 x 1.25 x 40, M12 x 1.25 x 50, M16 x 1.5 x 60
Material and Grade Class 8.8 carbon steel, Class 10.9 alloy steel, A4 stainless steel
Finish Plain, zinc plated, black oxide, hot dip galvanized, zinc flake
Quantity Pieces per size, shipment batch, or annual demand
Packaging Bulk carton, small box, palletized export packing, buyer label
Inspection Requirements Dimensional report, thread gauge record, hardness test, material certificate

Send drawings, purchase descriptions, and packing requirements through contact XZ Fastener for factory review.

Часто задаваемые вопросы

What is DIN 961 used for?

DIN 961 fine thread hex bolts are used in assemblies requiring metric fine pitch and full-thread engagement, such as machinery, automotive parts, equipment brackets, and tapped-hole applications.

How is DIN 961 different from DIN 960?

DIN 961 is generally used for full-thread fine pitch hex bolts, while DIN 960 is used for fine pitch hex bolts with a shank or partial thread. Buyers should confirm the required standard before ordering.

Can DIN 961 bolts be supplied in Class 10.9 or 12.9?

Yes. Class 10.9 and 12.9 can be supplied according to order requirement. The buyer should also confirm matching nuts, washers, tightening practice, and any required test documents.

Can DIN 961 fine thread bolts be hot dip galvanized?

Hot dip galvanized finish can be supplied when specified, but fine threads require careful fit checking after coating. Matching nuts should be confirmed at the same time.

What inspection items matter most for DIN 961 bolts?

Important inspection items include diameter, length under head, fine pitch, full-thread form, head dimensions, grade marking, hardness, finish appearance, coating requirement, and nut fit when applicable.

What should buyers send for a DIN 961 quotation?

Send the size list, exact fine pitch, strength class, material, finish, quantity per size, packaging method, and inspection requirements. Drawings or previous purchase descriptions are helpful for confirmation.

Send Your DIN 961 Factory Requirement

For accurate production review, send your DIN 961 fine thread hex bolt size list, finish, quantity, packaging method, and inspection requirements. Include matching nuts, carton labels, pallet marks, drawings, and document requirements when the order is part of a larger assembly or project supply package.

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