B8M Stud Bolts
with Gr. 8M Nuts
SS316 Matched Set
Why Buying B8M Stud Bolts with Gr. 8M Nuts as a Set Genuinely Matters
B8M studs and Grade 8M nuts are both well-documented, standard ASTM grades on their own — sourcing them from different suppliers, or from the same supplier across different orders, generally works fine. But “generally works fine” isn’t the same guarantee as a set genuinely manufactured together.
Thread fit between a stud and nut depends on both parts being cut to compatible tolerance classes, on the same or genuinely equivalent thread standard, from material with matching mechanical response — a stud from one mill and a nut from another can both individually meet spec and still run slightly tight, slightly loose, or gall differently during installation, especially in stainless, which is more prone to thread galling than carbon steel to begin with.
Buying a matched set removes that specific risk at the source — both components manufactured under the same quality process, verified together, and traceable to heat numbers we can confirm are genuinely compatible before the set ever ships, rather than hoping two independently-sourced parts happen to fit exactly as intended.
Akbar Fasteners Pvt. Ltd. exports to over 50 countries, and every B8M/Gr. 8M set we ship is verified for thread fit and material compatibility under our ISO 9001:2015 quality system before dispatch.
What Buying Together Genuinely Solves
Guaranteed Thread & Fit Compatibility
Both components cut and verified together, removing tolerance-stack risk between separate sources.
Single Traceable Documentation
One set-level MTC covering both stud and nut, rather than reconciling two separate certificates.
Reduced Procurement Overhead
One RFQ, one PO, one shipment — meaningfully simpler than sourcing and reconciling two line items.
Verified Galling Performance
Thread engagement tested as an assembled pair, not assumed from two independently-spec’d parts.
The Complete B8M / Gr. 8M Bolted Joint
ASTM A193 Grade B8M Stud Bolt
SS316 stud bolt, solution annealed condition, manufactured to your specified length and thread size.
ASTM A194 Grade 8M Hex Nuts
Matching SS316 hex nuts, quantity to suit continuous or double-end stud configuration.
Single Set-Level Documentation
One MTC covering both components, referencing both heat numbers and confirming verified thread compatibility.
B8M / Gr. 8M Set Specification Details
Nominal Composition, Both Components
- Chromium 16.0 – 18.0%
- Nickel 10.0 – 14.0%
- Molybdenum 2.0 – 3.0%
- Carbon ≤0.08%
Typical Mechanical Range
- Stud Condition Solution Annealed
- Nut Condition Solution Annealed
- Thread Standard Metric / UNC / UNF on Request
- Thread Fit Class Verified as Assembled Pair
Set Options We Manufacture
- Continuous Stud + 2 Nuts Standard
- Double-End Stud + 2 Nuts Standard
- Custom Length & Diameter On Request
- Washers Added to Set On Request
Application Areas
Wherever a genuinely reliable, chloride-resistant bolted joint with guaranteed fit matters more than sourcing convenience alone.
Critical Flange Bolting
joints needing guaranteed fit
Marine & Offshore Assembly
bolted connections
Pressure Vessel Assembly
joints needing traceability
EPC Project Bulk Procurement
for large bolted-joint quantities
Standard Export Documentation
Prepared as standard practice for every B8M/Gr. 8M set shipment.
Single Set-Level MTC
Heat numbers, chemical composition, and mechanical properties for both stud and nut on one certificate.
Thread Fit Verification Record
Confirms the stud and nut were verified as an assembled pair before shipment.
Certificate of Conformance
Confirms the shipment matches the purchase order specification in full.
Certificate of Origin (COO)
Confirms India as country of manufacture for destination customs purposes.
NABL Accredited Test Reports
Independent mechanical and dimensional testing available on request.
Commercial Invoice & Packing List
Itemized value, Incoterm, and detailed carton/weight breakdown for customs clearance.
Internationally Recognised Standards Coverage
Related Fastener Grades & Materials
ASTM A194 Grade 8M Nuts
Our standalone Grade 8M nut reference, if you need nuts alone rather than a matched set.
View Grade 8M Nuts →ASTM A194 Grade 8 Nuts
Our 304-based baseline stainless nut grade, for non-chloride-critical service.
View Grade 8 →ASTM A193 Grade B8MLN / B8MLNA
Our low-carbon, nitrogen-enhanced 316LN-based variant, for weld-critical service.
View B8MLN / B8MLNA →Stainless Steel Fasteners Manufacturer India
Our broader stainless steel fastener manufacturing capability across all major grades.
View SS Manufacturer Guide →One Order,
One Guaranteed Fit
Tell us your stud length, diameter, and thread standard — we’ll quote the complete matched set with single-certificate traceability. Akbar Fasteners Pvt. Ltd. responds within 24 hours.
Sales: +91 724 0000 733 · Support: +91 800 9315 333 · sales@akbarfasteners.in