BIS Engineering Library

Technical tools, data and standards.

Fastener dimensions, cross-references, weights, coatings, markings, certification guides and project estimating tools in one searchable engineering library.

18 resources

01 · Data index

Fastener Technical Data

Search a broad index of dimensional standards, materials, threads, coatings, weights and certificates.

Open resource 02 · Datasheets

Technical Datasheets

Marked engineering drawings and supply references for bolts, nuts, washers, studs, anchors and U-bolts.

Open resource 03 · Threads

Thread & Dimension Lookup

Metric/UNC thread geometry plus M3–M64 head, nut and washer dimensions.

Open resource 04 · Standards

DIN / ISO / ASTM / IS Cross Reference

Search a large procurement cross-reference across dimensional, material, structural, thread and coating standards.

Open resource 05 · Calculator

Fastener Weight & Rate Calculator

Multi-line bolt, nut, washer, stud, U-bolt and foundation-bolt weight/rate calculations with marked drawings.

Open resource 06 · Weights

Fastener Weight Charts

Hub for bolt, nut, washer and threaded-rod mass references.

Open resource 07 · Coatings

Fastener Coating Selector

Screen HDG, zinc-flake, electro-zinc, PTFE/fluoropolymer and stainless options by service conditions.

Open resource 08 · Corrosion

Galvanized Coating Life

ISO 9223-based screening estimate using exposure category and zinc thickness.

Open resource 09 · HDG Threads

Galvanized Nut Overtapping

Understand zinc build-up, thread allowance and mating galvanized nut practice.

Open resource 10 · Identification

Bolt Head Markings

Metric, stainless, SAE and ASTM grade-marking reference with pairing notes.

Open resource 11 · Standards

Fastener Standards Explained

What dimensional, mechanical, structural, coating and inspection standards actually control.

Open resource 12 · Certificates

How to Read an MTC / 3.1

Interactive buyer guide to heat/lot traceability, chemistry, mechanical tests, coating and sign-off.

Open resource 13 · Project BOQ

Project Fastener Estimator

Turn approved connection counts into preliminary bolt, nut and washer quantities.

Open resource 14 · Bolt Lab

BIS Bolt Lab

Animated explainers for preload, thread engagement, galvanizing, markings, anchor behaviour and fastener manufacturing.

Open resource 15 · Weights

Bolt Weight Chart

Metric hex bolt / screw mass reference by size and length.

Open resource 16 · Weights

Nut Weight Chart

Standard, lock/half and heavy-hex nut weight reference.

Open resource 17 · Weights

Washer Weight Chart

Plain, structural and spring-washer mass reference.

Open resource 18 · Weights

Threaded Rod Weight Chart

BIS commercial 1 m, 2 m and 3 m rod weight reference.

Open resource

Use of data

Reference first.
The governing standard controls.

BIS tools support estimating, product selection and enquiry preparation. Final manufacture, design, inspection and acceptance must follow the current standard, approved drawing and project specification.