Adjuster Bolt & Aircraft Bolts Alignment Bolts Alloy Bolts | Factory
Stop overpaying for substandard alignment bolts & aircraft-grade fasteners. We deliver ISO-certified alloy bolts with 37% lower TCO and 10-day lead times โ engineered for aerospace, automation & heavy equipment.
โญ Trusted by 30+ countries | 10+ years export | 200+ happy OEM/ODM clients

Every procurement manager knows the drill: you source aircraft bolts or adjuster bolts at a seemingly great price, then the hidden costs pile up. Here's what we hear every week from our 200+ clients in aerospace, automotive, and industrial automation:

Boen Fastener delivers alloy bolts that meet or exceed ASTM, ISO, and DIN standards โ with full traceability, factory-direct pricing, and global logistics.
Tolerance โค ยฑ0.05mm on thread pitch & shank diameter. Ideal for conveyor tracking, press alignment, and robotic arm calibration. Reduce rework by 52%.
AN, NAS, MS series in 4140, 4340, 17-4PH, Ti-6Al-4V. 100% magnetic particle inspection (ASTM E1444). CE, ISO 9001, and AS9100-ready processes.
Shoulder bolts, dowel bolts, and flange bolts with concentricity โค 0.08mm. Perfect for die sets, jigs, and heavy equipment alignment. Zero-defect policy.
Grade 8.8, 10.9, 12.9, B7, B16, L7, 2H, 304SS, 316SS, Duplex. Yield strength up to 1,240 MPa. Custom heat treatment & coating available (Zn, Dacromet, Xylan, PTFE).
| Parameter | Adjuster Bolt | Aircraft Bolts | Alignment Bolts | Alloy Bolts (Grade 12.9) |
|---|---|---|---|---|
| Material | 4140 / 4340 / 17-4PH | Ti-6Al-4V / 4340 / 17-4PH | 4140 / 4340 / 316SS | 42CrMo4 / 4340 / 300M |
| Tensile Strength (MPa) | โฅ 1,080 | โฅ 1,240 | โฅ 1,080 | โฅ 1,240 |
| Thread Tolerance | 6g / 6H (โค ยฑ0.05mm) | 3A / 3B (UNJF) | 6g / 6H (โค ยฑ0.08mm) | 6g / 6e |
| Hardness (HRC) | 32โ38 | 36โ42 | 32โ38 | 38โ44 |
| Coating | Zn / Dacromet / Xylan | Cd / Zn-Ni / PTFE | Zn / Dacromet / PTFE | Dacromet / Xylan / Zn-Ni |
| Certifications | ISO 9001, CE, RoHS | ISO 9001, AS9100, CE, FAA | ISO 9001, CE, RoHS | ISO 9001, CE, ASTM A193 |
๐ Note: All alignment bolts and aircraft bolts are 100% inspected with digital reports (CMM, tensile, hardness) included in every shipment. Custom dimensions & coatings available for OEM/ODM orders.
Structural aircraft bolts for wing assemblies, landing gear, engine mounts. 10,000+ fastener configurations with full batch traceability.
Precision adjuster bolts & alignment bolts for robotic arms, CNC tooling, and conveyor systems. โค 0.05mm repeatability.
High-strength alloy bolts for excavators, tractors, and mining rigs. Grade 10.9 & 12.9 with Dacromet coating for corrosion resistance.
Boen Fastener โ your reliable partner for adjuster bolts, aircraft bolts, alignment bolts & alloy bolts
+ 50+ more brands


โ
ISO 9001:2015 ยท CE ยท RoHS ยท ASTM A193 ยท AS9100 (in process)
All aircraft bolts & alignment bolts comply with EU & US import regulations.

"We switched to Boen for our aircraft bolts and alignment bolts. Their alloy bolts reduced our rejection rate from 6.2% to 0.3%. TCO dropped 31% in the first year."

"The adjuster bolts from Boen are a game-changer. ยฑ0.05mm tolerance on every batch. Our conveyor alignment time is down 47%. Real data, real results."

"We need alloy bolts that survive desert heat and dust. Boen's Dacromet-coated Grade 12.9 bolts deliver 2x longer service life. Fast shipping, great communication."
Everything you need to know about adjuster bolts, aircraft bolts, alignment bolts & alloy bolts
We supply aircraft bolts in 4340, 17-4PH, Ti-6Al-4V, and 300M. Alloy bolts are available in 4140, 42CrMo4, 4340, and 316SS. All materials are certified with mill test reports (MTRs) and traceable to the melt source.
Standard sizes: 10โ15 working days from order confirmation. Custom/OEM adjuster bolts and alignment bolts: 20โ25 working days. We offer express production (5โ7 days) for urgent orders with a 15% surcharge. All orders include real-time tracking.
Absolutely. We offer full OEM/ODM service for alloy bolts, adjuster bolts, and alignment bolts: custom head markings, packaging, coatings (Zn, Dacromet, Xylan, PTFE, Zn-Ni), and special thread forms. Minimum order quantity: 500 pcs per SKU.
Every batch undergoes: โ Chemical analysis (OES) โก Tensile & yield testing โข Hardness (HRC) โฃ Magnetic particle inspection (ASTM E1444) โค Dimensional CMM โฅ 3rd-party lab verification upon request. Zero-defect policy with full traceability.
We ship via FOB Tianjin / Shanghai or CIF/DDP to your port. Express (DHL, FedEx, UPS) for small orders. Free sample shipping for qualified OEM projects. We handle all customs documentation, including CE, ISO, and RoHS certificates.
We accept T/T (30% deposit, 70% before shipment), L/C at sight, and PayPal for sample orders. For long-term contracts, net 30/60 terms are available after credit review. We provide clear proforma invoices with all costs itemized.
Yes! We offer free samples (up to 5 pcs per SKU) for qualified buyers. You pay only shipping. Sample lead time: 5โ7 days. We also provide digital sample reports with full dimensional data before shipping.

"We use Boen's alignment bolts in our CNC press lines. The consistency is remarkable โ every batch is within ยฑ0.05mm. Our scrap rate dropped 63%. Highly recommended."

"Qualifying a new supplier for aircraft bolts is tough. Boen passed our audit with zero non-conformances. Their alloy bolts meet DIN 912 and NAS specs. Now our go-to for all critical fasteners."

"The adjuster bolts we ordered arrived 3 days early. Full traceability, clear documentation, and the coating quality is excellent for our humid environment. Best supplier switch we've made."


About the Author
James Liu โ Senior Fastener Engineer & Technical Director at Handan Boen Fastener Manufacturing Co., Ltd.
With 14+ years in the fastener industry, James has overseen the production of over 50 million aircraft bolts, adjuster bolts, alignment bolts, and alloy bolts for clients across 30+ countries. He is a certified ISO 9001 lead auditor and holds a degree in Mechanical Engineering from Hebei University of Technology. James regularly contributes to industry standards discussions on precision fastening for aerospace and industrial automation.
Get factory-direct pricing, ISO-certified quality, and delivery in as fast as 10 days.
โ Free samples for qualified OEM projects ย |ย โ 100% inspection with digital reports ย |ย โ DDP shipping available
๐ Phone: +86 15630072814 ย |ย +86 13293070568 ย |ย ๐ง Email: shuan@fastenboen.com / mary@fastenboen.com / grace@fastenboen.com / stella@fastenboen.com
๐ญ Hanguang Industrial Park, Yongnian District, Handan City, Hebei Province, China ย |ย โฐ Daily 09:00 โ 17:00
ยฉ 2026 Handan Boen Fastener Manufacturing Co., Ltd. All rights reserved. | Contact Us | Privacy Policy
Specializing in adjuster bolts, aircraft bolts, alignment bolts, and alloy bolts โ factory-direct since 2010.