Tailless Wire Thread Inserts | Tangless Stainless Steel Thread Reinforcement Inserts

1. Product Introduction
FH-Flight Tailless Wire Thread Inserts are the upgraded iteration of conventional tang-type wire inserts. The traditional protruding installation tang is completely cancelled, and symmetrical hook-shaped driving grooves are machined at both ends of the coil body. Operators can clamp either end for installation without sorting inserts by direction.
Produced from precision rolled rhombic stainless steel wire, the product retains the high elastic tensile structure of standard wire inserts. After being screwed into ST tapped holes, it forms standard ISO internal threads to reinforce low-strength alloy substrates and repair worn stripped holes.
Two mainstream models are available: FR Free Running Type and SL ScrewLock Anti-Vibration Type, fully compliant with DIN8140 and national military standard GJB119.

2. Exclusive Unique Advantages of Tailless Structure
✅ Cancel Tang Breaking Process: Cut mass assembly cycle time by over 35%, reduce one post-processing station on production lines
✅ Bidirectional Clamping Design: No need to distinguish front/rear ends, save pre-sorting labor cost
✅ Zero Metal Residue Risk: No broken tang fragments left inside blind cavities, avoid circuit short-circuit and component jamming failure
✅ Flush Mount Surface: No protruding notch after installation, fit thin-wall miniaturized structural parts
✅ Reversible Extraction: Can be reversed out via both end grooves without damaging base threads for repeated overhaul parts
✅ Higher Assembly Consistency: Avoid thread scratch defects caused by tang punching operation
✅ Exclusive Blind Hole Solution: The only wire insert suitable for fully enclosed blind hole structures

3. Comparison: Tailless VS Ordinary Tang Wire Inserts
表格
Comparison Item    FH-Flight Tailless Wire Insert    Ordinary Tang Wire Insert
Mounting Direction    Bidirectional, no sorting required    Single tang side only, direction screening needed
Post-processing    No tang cutting operation required    Mandatory tang breaking & cleaning step
Blind Hole Adaptability    Excellent, no residual metal fragments    Poor, broken tang hard to take out
Surface Flatness    Completely flush with workpiece    Tang notch protrusion exists
Disassembly Mode    Reverse extraction from both ends    Only extract from open side
Automated Line Matching    Perfect for robot automatic assembly    Extra tang punching station required
Hidden Failure Risk    No metal chip hidden danger    Fragments may jam precision components

4. Product Types & Matching Scenarios
Type 1 FR Tailless Free Running Insert (Green Identification Mark)
Smooth full-circle thread without locking polygon, low friction coefficient, suitable for frequent disassembly & assembly working conditions.
Application: Precision testing instruments, medical titanium parts, 3C electronic housings, lightweight alloy injection molds.
Type 2 SL Tailless ScrewLock Insert (Red Identification Mark)
Built-in polygonal locking coils, form elastic friction locking force to prevent bolt loosening under long-term vibration.
Application: New energy vehicle chassis components, aerospace thin-wall structural parts, hydraulic vibrating valve bodies, rail transit fasteners.

5. Optional Materials & Temperature Resistance Parameters

6. Complete Thread Specification Range
Metric ISO Thread: M2 ~ M12, standard lengths 0.5d / 1d / 1.5d / 2d / 2.5d / 3d
Imperial Thread: UNC coarse thread, UNF fine thread (2-56 ~ 1/2-20)
Thread Tolerance: Standard internal thread ISO 6H; customized aviation precision grade 5H
7. Special Mounting Tools & Operating Steps

Drill pilot hole according to matched drill diameter specification
Tap workpiece hole with FH-Flight dedicated ST tap
Clamp either end driving groove of tailless insert with special tangless mounting mandrel
Screw insert into tapped hole to standard depth (0.25 pitch below workpiece surface)
Assembly finished directly without subsequent tang breaking work
Compatible with manual torque wrenches, electric and pneumatic automatic mounting guns for assembly line mass production.

8. Covered Application Industries
Aerospace & Defense: Aircraft thin-wall aluminum frames, satellite structural components
New Energy Vehicles: Battery trays, motor shells, closed electronic control blind cavities
Precision Medical Devices: Sealed instrument housings, titanium structural fittings
3C Consumer Electronics: Miniature blind-hole precision camera parts
Hydraulic & Pneumatic Equipment: Closed valve body blind threaded holes
Rail Transit: Vibration-resistant lightweight alloy connecting pieces
Mold Manufacturing: Thin-wall plastic mold blind thread repair

9. Manufacturer Introduction
Xinxiang Flight Fasteners Co., Ltd operates under the brand FH-Flight, with more than 20 years of threaded insert R&D and production experience. We own independent invention patents for tailless wire inserts, and have passed ISO9001 quality management system certification and GJB9001 military product quality system certification.
Equipped with full-automatic precision forming production lines, every batch undergoes full dimensional inspection. We provide spot supply of standard tailless inserts, and support customized non-standard specifications (special length, special alloy material) for aerospace, medical and high-end precision industrial customers all over the world.