Products Description
This Fine Thread Thumb Screw is engineered specifically for electrical enclosures, instrument panels, and modular hardware where tool-free access and flush surface mounting are mandatory. Fabricated via high-speed cold heading technology, the fastener delivers exceptional structural integrity and uniform grain flow compared to traditional machined alternatives. As an experienced source manufacturer, our production lines accommodate full customization of shank length, thread pitch, and spade configurations. We integrate tooling design, precision cold forging, thread rolling, and chemical passivation under one roof, ensuring absolute dimensional consistency and immediate volume scalability for industrial OEMs.
Technical Specifications & Materials
| Technical Parameter | Specification Standard |
|---|---|
| Material Grade | AISI 304 Stainless Steel / Carbon Steel |
| Head Type | Spade-head Thumb Screws - Flat Spade / Low-Profile Flat Head Thumb Screw |
| Thread Type | Metric / Unified Fine Thread (UNF) |
| Tensile Strength | ≥ 620 MPa |
| Dimensional Tolerance | ±0.015 mm |
| Surface Finish | Passivated / Black Oxide Anti-Corrosion |
| Compliance Standards | RoHS, REACH, ISO 9001 |
Quality Control & Testing Standards
Optical Sorting & Dimensional Inspection
Every production batch of Spade Head Thumb Screw undergoes 100% automated optical sorting combined with CMM coordinate measuring machine checks to maintain tight tolerances down to ±0.015 mm, eliminating out-of-spec parts before packaging.
01
Metallurgical & Raw Material Verification
Incoming AISI 304 stainless steel and carbon steel wire rods for the Single Wing Thumb Screw are verified via spectrometer analysis (PMI) to guarantee strict chemical composition compliance and certified mechanical properties.
02
Corrosion Resistance & Salt Spray Testing
Finished Thumb Screw with Flat Spade Head fasteners undergo neutral salt spray (NSS) testing up to 96 hours to validate the effectiveness of passivated and black oxide anti-corrosion treatments in aggressive industrial environments.
03
Torque-Tension & Thread Integrity Testing
Random samples of Spade Head Thumb Screws with Shoulder are subjected to rigorous rotational torque and tensile load evaluations using digital force gauges, ensuring smooth manual operation, zero thread galling, and secure anti-vibration locking.
04
Traceability & Material Test Reports (MTR)
Full lot traceability is maintained for Shoulder Spade Thumb Screws from raw material ingestion to final packaging, with comprehensive Material Test Reports (MTR) provided upon request to support strict OEM quality audits.
05
Frequently Asked Questions
Why is 304 stainless steel chosen over carbon steel for these Spade-head Thumb Screws Thumb Screw?
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304 stainless steel provides superior resistance to atmospheric oxidation and chemical corrosion in harsh industrial enclosures, eliminating red rust formation while maintaining robust mechanical tensile strength without requiring secondary protective plating layers.
How does the cold forging process impact the thread durability of Flat Head Hand Switch Screws?
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Cold forging realigns the metal grain structure continuously along the fastener contour rather than cutting it. This increases shear resistance and fatigue endurance, ensuring smooth, repeatable manual engagement and disengagement without thread stripping or galling.
What is the typical lead time for custom Spade Head Thumb Screw prototypes?
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Custom tooling and prototype sampling typically require 7 to 12 days based on specific drawing geometries. Full production runs follow strict IATF-aligned PPAP documentation workflows to guarantee absolute batch-to-batch repeatability before volume delivery.
contact us
Accelerate your assembly line efficiency with factory-direct supply. Contact our engineering desk today for custom prototyping or bulk wholesale pricing on high-tolerance Fine Thread Thumb Screw.
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