ASME B18.16.6 Prevailing Torque Hex Nut Manufacturer | All Metal Lock Nut | Top Deflection Locking Nut | GFM-WCR System

Brand Name：

LONGZE

Factory：

yes

Samples：

samples are free

MOQ：

1000PCS

Packing：

carton, pallet or customizable

Email：

eric@lzfasteners.com

CONTACT NOW

Download PDF

Email: eric@lzfastenercom

WhatsApp: +86 15350500528

Phone: +86 18830006928 15350500528

Detail

ASME B18.16.6 Prevailing Torque Hex Nut Manufacturer | All Metal Lock Nut

LONGZE high-performance ASME B18.16.6 Prevailing Torque Hex Nuts (All-Metal Type) are precision-engineered for high-temperature and high-stress industrial environments. As a core element of the LONGZE GFM-WCR System, these nuts utilize top-deflection locking technology to ensure consistent prevailing torque without the use of non-metallic inserts. Our manufacturing ensures strict adherence to ASME B18.16.6 specifications, providing exceptional vibration resistance for heavy machinery, structural, and energy sector applications.

🛡️ LONGZE ENGINEERED FASTENING SYSTEM

Optimal factory-direct assembly for imperial high-vibration environments:

🔹 Primary Bolt: ASME B18.2.1 | DIN 931 / 933 | ISO 4014 / 4017
🔹 Standard Washer: ASME B18.22.1 | DIN 125 | ISO 7089
🔹 Hardened Structural Washer: ASTM F436 (Ref) | DIN 6916 | ISO 7416
🔹 Spring Lock Washer: ASME B18.21.1 | DIN 127 | ISO 10673 (Ref)

LONGZE GLOBAL FASTENERS STANDARDS SYSTEM

Engineering Standard Mapping Layer (ASME ➔ DIN ➔ ISO)

Dimensional Mapping
ASME B18.16.6 ➔ DIN 980 (Ref) ➔ ISO 7042 (Ref)

Technical Property Mapping
ASME B18.16.6 ➔ ISO 2320 (Ref) ➔ DIN EN ISO 2320

LONGZE Technical Specification & Performance Lab

1. Technical HUB

Range	1/4" to 1-1/2"
Grade	Grade B, C, G
Standards	ASME \| DIN \| ISO
Locking Method	All-Metal Deflection

2. Surface Lab

Zinc Plated	ASTM B633 (ISO 4042 Ref)
Zinc Flake	ISO 10683
Specialty	Phosphate / Waxing

3. QC Lab

Torque Test	ASME B18.16.6 / ISO 2320
Hardness	Rockwell C / Vickers
Certifications	Full MTC 3.1 / ISO 16228

📊 ASME B18.16.6 Dimensional Matrix (Imperial All-Metal)

Nominal Size	1/4"	5/16"	3/8"	7/16"	1/2"	9/16"	5/8"	3/4"	7/8"	1"
Threads (UNC/UNF)	20/28	18/24	16/24	14/20	13/20	12/18	11/18	10/16	9/14	8/12
Height (H) max	0.226	0.273	0.337	0.385	0.448	0.496	0.559	0.665	0.776	0.887
Across Flats (W)	0.438	0.500	0.562	0.625	0.750	0.875	0.938	1.125	1.312	1.500

📥 DOWNLOAD OFFICIAL TECHNICAL DATA SHEET (TDS)

LZ-TDS-ASME-B18166-2026-V1.0.pdf

Customized Fastening Solutions & Drawing Support

📐

Send us technical drawings or assembly requirements for optimized locking solutions.

📩 eric@lzfasteners.com

* Professional factory-direct consultation.

🛡️ LONGZE STRATEGIC RISK MANAGEMENT & RESILIENCE

RISK MITIGATION PROTOCOLS

Locking Risk: ASME B18.16.6 first and fifth removal torque verification.
Material Risk: Proof load testing per ASTM A563 / ISO 898-2 requirements.
Thermal Risk: All-metal integrity check for high-temperature stability.
Compliance Risk: ISO 3269 inspection and chemical substance safety.

SUPPLY CHAIN RESILIENCE

Material Buffer: Strategic inventory of high-grade alloy and carbon steel.
Volume Ready: Automated high-speed tapping and deflection assembly lines.
Redundancy: Certified secondary heat treatment partners per ISO standards.
Transparency: Batch-coded traceability from steel coil to final inspection.

🛡️ LONGZE RED-LINE POLICY

Quality Guarantee: Any deviation from the signed TDS or PI is subject to 100% replacement after verification. We guarantee locking performance for every batch.

🚢 LOGISTICS RISK MANAGEMENT

Secure Shipping: Moisture-resistant packaging and photographic evidence of loading provided for every container to ensure cargo arrives intact.

ASME & ISO Technical FQA

❓ Q: How does ASME B18.16.6 compare to ISO 7042?

A: While ASME B18.16.6 covers imperial dimensions and specific deflection types, ISO 7042 is the metric counterpart for all-metal prevailing torque nuts. Both focus on high-vibration security.

🔄 Q: What are the reuse guidelines for all-metal lock nuts?

A: Per ASME B18.16.6 and ISO 2320, they are designed to maintain locking torque for up to 5 cycles. For safety-critical joints, fresh installation is always recommended.