F A S T E N E R ‘S T U T O R I A L
Fastener Technical Information Centre
One consolidated technical-learning page bringing together the subjects currently presented across Aanuraj's Fastener's Tutorial, materials and grades, standards and dimensions, weight charts, identification markings and technical guides.
1. Fastener's Tutorial
The original Aanuraj technical-information page presents the learning area as a fastener tutorial covering fastener fundamentals, bolt heads/drives/threads, and fastener materials and applications.
Mastering Fasteners
Step-by-step introduction to fasteners with Aanuraj Fasteners.
Watch Bolt Tutorial Playlist →Fastener Materials Guide
Properties and applications of different fastener materials.
Watch Materials Playlist →2. Materials & Grade Reference
The current Aanuraj materials reference groups fasteners into Nickel Grade, Duplex Steel and High Tensile Alloy Steel families.
Nickel Grade Fasteners
ASTM A453 Gr. 660
Classes A, B, C, D • UNS S66286
Monel 400
ASTM B564 • Alloy N04400
Monel K500
ASTM B865 • UNS N05500
Hastelloy C276
ASTM B574 • Grade 276 • UNS N10276
Inconel 625
ASTM B446 • Alloy N06625
Hastelloy C22
ASTM B574 • Grade 22 • UNS N06022
Inconel 825
ASTM B825 • Alloy N08825
Alloy 20
ASTM B473 • UNS N08020
Duplex / Super Duplex Fasteners
Super Duplex
ASTM A276 • UNS S32760
Super Duplex 2507
ASTM A479 • UNS S32750
Duplex 2205
ASTM A240 • UNS S31803
SMO 254
ASTM A193 B8MLCuNA • UNS S31254
High Tensile Alloy Steel / Studs / Bolts / Nuts
ASTM A193 Gr. B7
High-tensile alloy steel stud/bolt grade.
ASTM A194 Gr. 2H
Heavy hex nut grade.
ASTM A193 Gr. B7M
Modified alloy-steel fastener grade.
ASTM A194 Gr. 2HM
Matching nut grade listed by Aanuraj.
ASTM A193 Gr. B16
Cr-Mo-Va alloy steel grade.
ASTM A194 Gr. 7M
Nut grade listed by Aanuraj.
ASTM A320 Gr. L7
Low-temperature service grade.
ASTM A320 Gr. B8
Stainless fastener grade listed in the reference.
Example: Inconel 825 Reference Data
| Element / Property | Aanuraj page value |
|---|---|
| Nickel (Ni) | 38.0–46.0 % |
| Iron (Fe) | 22.0 % min |
| Chromium (Cr) | 19.5–23.5 % |
| Molybdenum (Mo) | 2.5–3.5 % |
| Copper (Cu) | 1.5–3.0 % |
| Titanium (Ti) | 0.6–1.2 % |
| Carbon (C) | 0.05 % max |
| Manganese (Mn) | 1.0 % max |
| Sulfur (S) | 0.03 % max |
| Silicon (Si) | 0.5 % max |
| Aluminium (Al) | 0.2 % max |
| Reference material specification | ASTM B564 forging round bar |
| Tensile strength | 85 ksi |
| 0.2% yield strength | 30–35 ksi |
3. Standards & Dimensions
The Aanuraj dimensions page groups commonly used standards for nuts, screws, bolts, studs and washers.
ASME Inch Series
ASME B18.2.1 — heavy hex screws, hex screws and full-thread studs.
ASME Nuts
ASME B18.2.2 — heavy hex nuts and hex nuts.
ASME Metric
ASME B18.2.3.1M — metric hex bolt / hex screw reference.
Metric Studs
ASME B18.31.1M — full-thread stud reference.
Washers
ASME B18.22.1, ASME B18.22M and DIN 125 references.
Metric Hex Nuts
DIN 934 reference is listed by Aanuraj.
4. Nut & Bolt Weight Charts
Aanuraj's weight-chart page separates metric and inch references and provides links for common fastener combinations.
Available chart categories
- Hex bolt with nut
- Hex screw without nut
- Hex screw with nut
- Hex nut
- Stud + 2 heavy hex nuts
- Hex bolt without nut
- Plain washer
- Stud + 2 heavy hex nuts + 2 washers
5. Fastener Identification & Grade Markings
The Aanuraj grade-marking reference explains fastener identification using marking, specification, fastener description, material, size range and mechanical-property fields.
SAE J429
Grades 1, 2 and 4 are included in the source reference.
ASTM A307
Grades A & B are listed for low-carbon steel.
ASTM A193
B5, B6, B7, B16, B8, B8C, B8M and B8T are among the grades shown.
ASTM A320
L7 and related low-temperature-service grades are included in the source.
Stainless Grades
A193 B8 = AISI 304; B8C = AISI 347; B8M = AISI 316; B8T = AISI 321 in the source table.
Mechanical Properties
The source table includes proof load, yield strength and tensile strength fields where applicable.
6. Fastener Failure Prevention
The original Technical Guide menu includes a dedicated “Fastener Solutions Guide to Prevent Fastener Failures”. The guide is intended as a practical problem-solving area.
Galling
Understand stainless-steel galling and the factors that cause thread seizure.
Hydrogen Embrittlement
Understand hydrogen-related cracking risk in high-strength / coated threaded fasteners.
Corrosion
Material selection and environmental exposure are central to fastener performance.
Thread Problems
Identification, fit, lubrication and manufacturing/finishing conditions can affect assembly.
7. Technical Blogs
8. Recommended Technical Learning Path
01 — Identify
Learn bolt, nut, stud and washer terminology and fastener markings.
02 — Select Material
Compare stainless steel, duplex, super duplex, nickel alloys and high-tensile grades.
03 — Select Standard
Choose the relevant ASTM, ASME, DIN or other dimensional/product standard.
04 — Verify Dimensions
Check nominal size, pitch, head dimensions, thread length and washer/nut compatibility.
05 — Check Weight
Use weight charts or calculate from volume and material density.
06 — Prevent Failure
Review galling, corrosion, hydrogen embrittlement and other application-specific risks.
9. Aanuraj Technical Enquiry
For a specific fastener requirement, drawing, BOQ, grade, size, quantity or technical specification, contact the Aanuraj team.
Source & Content Note
This consolidated page was prepared by reviewing the live Aanuraj Technical Information page and accessible linked technical pages. It preserves the terminology and information found on those sources rather than silently replacing them with unrelated general-reference data.
“Mastering Fasteners: A Step-by-Step Tutorial with
Aanuraj Fasteners Pvt Ltd”
“The Ultimate Bolt Tutorial: Learn About Different Heads, Drives, and Threads”
“The Fastener Materials Guide: Exploring the Properties and Applications of Different Materials”
Technical Blogs
What is Stainless Steel Galling and what Causes it?
Is Duplex Stainless Steel Corrosion Resistant?
Hydrogen Embrittlement in HDG Threaded Fasteners
