3/8-16 x 2 And 3/8-24 Socket Head Cap Screw | Supplier
๐ฉ 3/8-16 x 2 & 3/8-24 Socket Head Cap Screw โ Factory-Direct Strength for Demanding B2B Applications
Eliminate supply chain risk with ISO-certified, high-tensile alloy steel socket head cap screws. Engineered for OEM machinery, automotive assemblies & heavy equipment โ delivered in 10โ18 days, at 30% lower cost than domestic distributors.
โ Free samples available ย |ย โ No minimum order quantity
Handan Boen Fastener โ 50,000 sqm production base
โ ๏ธ The True Cost of Cheap Fasteners
When a 3/8-16 x 2 socket head cap screw fails at 120 Nยทm, the repair bill can exceed $8,000. Hereโs what procurement and engineering teams tell us:
Inconsistent Tensile Strength
Low-cost imports often test below 120 ksi โ causing joint loosening under vibration. 42% of equipment failures in heavy machinery trace back to fastener fatigue (2024 Industry Report).
Thread Tolerance Drift
A 3/8-24 socket head cap screw with loose thread fit increases galling risk by 3x. Reject rates of 8โ12% are common with unverified offshore suppliers.
Hidden Shipping & Tariff Costs
Air freight for urgent orders can add $0.18โ$0.35 per unit. Combined with Section 301 tariffs, the โcheapโ price disappears.
No Traceability
Without mill certificates or heat-lot traceability, you canโt audit quality. 63% of purchasing managers say lack of documentation is a dealbreaker.
You need a supplier who guarantees traceable, code-compliant fasteners โ not just a low price.
โ Why Boen Fastener Is Your Lowest-Risk Source for 3/8-16 x 2 & 3/8-24 Socket Head Cap Screws
We donโt just sell fasteners โ we deliver certified reliability with full traceability and factory-direct economics.
Factory-Direct Pricing
Eliminate 2โ3 layers of margin. 30โ40% savings vs. tier-1 distributors.
Alloy Steel 4140 / 42CrMo4
Tensile strength 150โ170 ksi, hardness HRC 32โ39. Passes wedge tensile & decarburization tests.
Full Traceability
Mill certs, heat-lot records, and ISO 9001:2015 quality management.
10โ18 Day Delivery
Expedited production for standard sizes. 100% on-time shipping record Q1โQ3 2025.
OEM/ODM Capability
Custom head markings, drive types, and coatings (ZnNi, Dacromet, PTFE).
Global Compliance
ASTM A574, ISO 898-1, SAE J429, RoHS, REACH โ ready for your audit.
๐ Technical Specifications โ 3/8-16 x 2 & 3/8-24 Socket Head Cap Screw
| Parameter | 3/8-16 x 2" SHCS | 3/8-24 x 2" SHCS | Standard / Test Method |
|---|---|---|---|
| Thread Size | 3/8-16 UNC | 3/8-24 UNF | ASME B1.1 |
| Length (under head) | 2.000" ยฑ0.015" | 2.000" ยฑ0.015" | ASTM F835 |
| Material | Alloy Steel 4140 / 42CrMo4 | Alloy Steel 4140 / 42CrMo4 | ASTM A574 |
| Tensile Strength (min) | 150 ksi | 150 ksi | ASTM F606 |
| Hardness | HRC 32โ39 | HRC 32โ39 | ASTM E18 |
| Finish | Black Oxide / ZnNi / Plain | Black Oxide / ZnNi / Plain | ASTM B633 / ISO 9227 |
| Certification | ISO 9001:2015, RoHS, REACH, Mill Cert (EN 10204 3.1) | ||
โ Custom lengths, drive types (hex, TORXยฎ), and coatings available per OEM specs.
๐ค Trusted by Engineering & Procurement Teams in 30+ Countries
+ 25 more industry leaders
CNC thread rolling
Automated heat treatment
ISO 9001:2015
CE / UKCA
UL recognized
"We switched to Boen for our 3/8-16 x 2 socket head cap screw supply. Reject rate dropped from 9% to 0.3%. Their mill certs are always accurate."
โ Thomas R., Sr. Procurement Manager, German AGV Manufacturer
"The 3/8-24 SHCS from Boen saved us $0.14/unit vs. our previous distributor โ and the zinc-nickel finish passed 720h salt spray."
โ Evelyn K., Supply Chain Director, US Hydraulics Co.
"OEM head stamping was a challenge we couldn't find locally. Boen delivered 50,000 pieces in 14 days, perfectly marked."
โ Diego M., Industrial Engineer, Spanish Robotics
โ Frequently Asked Questions โ 3/8-16 x 2 & 3/8-24 Socket Head Cap Screws
Q1: What is the difference between a 3/8-16 x 2 and a 3/8-24 socket head cap screw?
The 3/8-16 x 2 has 16 threads per inch (UNC โ coarse thread), while the 3/8-24 has 24 threads per inch (UNF โ fine thread). Fine threads offer higher clamp load per torque and better vibration resistance, while coarse threads are more forgiving in softer materials.
Q2: Do you offer a certificate of conformance and material test reports?
Yes. Every shipment of 3/8-16 x 2 and 3/8-24 socket head cap screws includes a COC and mill test report (EN 10204 3.1) at no extra cost. Third-party inspection is also welcome.
Q3: What is the minimum order quantity (MOQ)?
For standard sizes, MOQ is 500 pieces per size. For custom orders (head marking, special coating), MOQ is 2,000 pieces. Sample orders (50โ100 pcs) are available for qualification.
Q4: How do you handle shipping to the USA / Europe?
We ship via sea freight (FOB Shanghai or CIF) for bulk orders, and DHL/UPS/FedEx for samples. Typical transit: 10โ14 days sea, 3โ5 days air. We handle all customs documentation.
Q5: Can you provide free samples for testing?
Absolutely. We offer free samples (up to 10 pieces per size) for qualified B2B buyers. You only pay shipping. Request yours through the form below.
Q6: What payment terms do you accept?
We accept T/T (30% deposit, 70% before shipment), L/C, PayPal (for samples), and Western Union. For established clients, net-30 terms may be available after credit review.
Q7: How do you ensure consistent quality across production runs?
We follow ISO 9001:2015 procedures: 100% dimensional inspection on first-off, in-process SPC checks, and final random sampling per ANSI/ASQ Z1.4. Hardness and tensile tests are performed every batch.
Q8: Can you customize the head marking or drive type?
Yes. We offer custom head marking (brand, grade, logo), hex drive, TORXยฎ, and hexalobular drives. Lead time for custom tooling is 5โ7 days.
โญ Real Reviews from B2B Buyers
"We ordered 12,000 pcs of 3/8-16 x 2 socket head cap screws. The tensile test results were consistent across all lots. Delivery was 2 days early. Will reorder."
"The 3/8-24 SHCS with zinc-nickel coating passed our 480h salt spray test. Boen's quality team is very responsive."
"We needed a custom head marking for our OEM line. Boen delivered 50k pieces in 14 days with perfect marking. Incredible speed."
"The technical specs matched our requirements exactly. We saved 37% vs. McMaster-Carr for the same ASTM A574 grade."
Written by David Han โ Senior Fastener Engineer & Export Specialist
David has 18 years of experience in industrial fastener manufacturing, with a focus on alloy steel socket head cap screws for global OEMs. He leads technical compliance at Handan Boen Fastener.
๐ Ready to Secure Your Supply Chain?
Get factory-direct pricing on 3/8-16 x 2 and 3/8-24 socket head cap screws โ with full traceability and on-time delivery.
โ Free samples for qualified buyers ย |ย โ 30-day money-back guarantee on first order
Or call us: +86 13293070568 (Daily 09:00โ17:00 CST)
Handan Boen Fastener Manufacturing Co., Ltd. | Hanguang Industrial Park, Yongnian District, Handan, Hebei, China
