ASTM A194 Grade 8M Nuts
ISO Certified manufacturer of SA 194 gr 8M Hex Nuts in India
ASTM A194 Grade 8M nuts are the standard pairing nut for A193 B8M stud bolts, and if you are working on pressure vessels, heat exchangers, or flanged joints in corrosive service, getting this combination right matters. Grade 8M is made from Type 316 stainless steel, which brings molybdenum into the chemistry and gives it noticeably better pitting resistance compared to regular Grade 8. These nuts handle temperatures up to 1500°F and carry a proof stress of 517 MPa, which covers most high pressure bolting applications without any concern.
Fasteners Online is a direct manufacturer of ASTM A194 Grade 8M nuts in India, producing hex nuts, heavy hex nuts, flange lock nuts, nylon lock nuts, and square nuts in sizes from M3 to M56 and 3/16" to 2" in imperial. Every nut is manufactured to ASME B18.2.2 standards with EN 10204 3.1B mill test certificates included. One thing buyers ask us regularly we stock both Grade 8M and 8MA, so if your project calls for the strain hardened version with higher mechanical properties, we have that too.
We keep ready inventory as a stockist of SA194 Grade 8M nuts across common sizes, which helps procurement teams avoid last minute delays on shutdown and turnaround jobs. As a trusted supplier serving oil and gas, power generation, chemical, and nuclear industries across India, we understand the documentation requirements these sectors carry. For international buyers, we are an established exporter shipping to UAE, Saudi Arabia, Oman, Qatar, and Malaysia regularly. Send your requirement to Fasteners Online today and we will respond with pricing and availability within 24 hours.
Table of Content
ASTM A194 Grade 8M Nuts Specification
ASTM A194 gr 8M Nuts Standard
ASME B18.2.2
ASME SA194 gr 8M Nuts Size
M3 – M56 | 3/6″ to 2″
SA194 grade 8M Hex Nuts Condition
Threading / Cold Drawn
ASTM A194 gr 8M Nuts fasteners Material
Type 316
A194 gr8M Heavy Hex Nuts Proof Load
24,830 lbf
SA 194 gr 8M material Yield Strength
240 MPa
ASTM A194 gr 8M Flange lock nut Threads
METRIC / UNF / BSF / BSW / UNC
ASTM A194 grade 8M class 2 Nut Standards
DIN 933, 976, 7991, 931, 934, 125 / ASME B18.2.1, B18.3
Custom Sizes
Reliable ASTM A194 Grade 8M Nuts manufacturer in India in wide range of sizes.
Manufacturing Technique
Hot forging / Cold forging
Origin
Indian / Russian / Korean / European
SA194 Gr 8M nut Finish
Passivation / Phosphating / HDG
Value Added Services
- Color Coding
- Head Shank Drilling
- Laser Etching
- Head Painting
Certificate
- 100% Radiography Test
- Raw Materials Certificate
- EN 10204/3.1B
- UT and PMI Test
Packaging
- Carton Box
- Wooden Cases
- Wooden Pallet
- Blister Packs
As an ASTM A194 Grade 8M nuts manufacturer in India, Fasteners Online produces every nut in house using hot and cold forging techniques with hardness testing and PMI verification on each batch.
| Property | ASTM A194 Grade 8M | ASTM A194 Grade 8MA |
|---|---|---|
| Strain Hardening | Not strain hardened | Strain hardened |
| Mechanical Properties | Lower strength | Higher strength |
| Marking | “8M” | “8MA” |
| Hardness Range | Lower | Higher |
Price list of ASTM A194 Gr 8M Nuts
| Product | Price in USD (Pcs) |
Price in Dirham (Pcs) |
Price in Euro (Pcs) |
|---|---|---|---|
| 5/8‑11 Hex Nuts, ASTM A194 grade 8M, Plain Finish | US $1.19 | 4.37 AED | € 1.02 |
| 1/4‑20 SA194 gr 8M Heavy Hex Nuts, UNF | US $0.21 | 0.78 AED | € 0.18 |
SA 194 gr 8M chemical composition
Carbon
0.08 (Max.)
Silicon
1.0 (Max.)
Manganese
2.0 (Max)
Phosphorus
0.045
Chromium
16.0-18.0
Sulfur
0.03 (Max.)
Nickel
10.0-14.0
Molybdenum
2.00-3.00
ASTM A194 Grade 8M mechanical properties
Temp Range
Up to 1500 °F
Proof Stress
517 MPa
Hardness
223 HBW
Elongation
30 % Min
SA 194 gr 8M material Hardness
| Hardness | 126-300 |
|---|
When you buy SA194 Grade 8M heavy hex nuts at factory price directly from us, you get mill certified material with no middleman cost added to the invoice. As an ASTM A194 8M nuts supplier in Mumbai, we dispatch material to clients across India on short notice and handle all export documentation for international shipments from our Mumbai office.
Different types of A194 Grade 8M Nuts
ASTM A194 gr 8M Flange lock nut
SA194 grade 8M Lock nut
ASTM A194 grade 8M class 2 Hex Nut
ASME SA194 grade 8M Nylon lock nuts
A194 gr8M Heavy Hex Nut
SA194 gr 8M Square nut
We stock ASME SA194 Grade 8M nuts for sale in hex, heavy hex, flange lock, and square configurations all supplied with EN 10204 3.2 certificates.
Proof load of ASTM A 194 gr 8M Nuts
| Nominal Size, inch | Stress Area inch | Threads per inch | Proof Load, lbf | |
|---|---|---|---|---|
| Hex | Heavy Hex | |||
| 1/4" | 0.0316 | 20 | 4770 | 5570 |
| 5/16" | 0.0524 | 18 | 7860 | 9170 |
| 3/8" | 0.0774 | 16 | 11620 | 13560 |
| 7/16" | 0.1063 | 14 | 15940 | 18600 |
| 1/2" | 0.1419 | 13 | 21280 | 24830 |
| 9/16" | 0.182 | 12 | 27300 | 31850 |
| 5/8" | 0.226 | 11 | 33900 | 39550 |
| 3/4" | 0.334 | 10 | 50100 | 58450 |
| 7/8" | 0.462 | 9 | 69300 | 80850 |
| 1" | 0.606 | 8 | 90900 | 106000 |
| 1 1/8" | 0.79 | 8 | 118500 | 138200 |
| 1 1/4" | 1 | 8 | 150000 | 175000 |
| 1 3/8" | 1.233 | 8 | 185000 | 215800 |
| 1 1/2" | 1.492 | 8 | 223800 | 261100 |
SA194 grade 8M Hex Nuts Applications
Industrial Products
Types
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