Thread Repair Kits, BSF 9/16 - 1,5D

• Thread repair of damaged or worn-out BSF 9/16 × 16 internal threads
• Thread armour plating for materials with low shear strength
• Recovery of rejected parts and reduction of scrap
• Creation of new, highly stable and long-lasting internal threads
• Perfect for maintenance, installation and small series production
• Wire thread inserts according to DIN 8140, tolerance ISO 2 (6H), type S – free running, stainless steel

• Flexible application thanks to coordinated inserts and tools within the V-COIL system
• High stock availability for standard and special BSF dimensions
• Suitable for hand thread cutting and repair operations
• Higher load capacity after repair due to improved thread geometry and load distribution
• Temperature and corrosion resistance thanks to stainless steel wire inserts
• Cost-effective alternative to replacing complete components
• Attractive and functional plastic presentation case for storage and transport

1. Inspect the thread: Clean the damaged thread thoroughly and remove chips, dirt and coatings.
2. Check core hole: Confirm that the core diameter fits the STI thread. If required, drill to the recommended STI core diameter (drill not included).
3. Cut the STI thread: Use the STI short machine tap BSF 9/16 × 16 with cutting oil and keep the tap aligned square to the surface.
4. Prepare the insert: Mount the wire insert onto the inserting tool with locking ring, No. 16 and set the installation depth.
5. Install the insert: Screw the insert into the STI thread until it sits flush or slightly below the surface.
6. Break the tang: Remove the driving tang with a suitable tool after installation.
7. Final check: Check the repaired thread using a suitable BSF 9/16 × 16 bolt.

For more detailed information on the V-COIL system, see the official V-COIL Technical Information – Thread Repair (PDF).

• System: V-COIL Thread Repair
• Nominal Size: BSF 9/16" × 16
• Repair Length: 1.5D
• Thread Type: BSF – British Standard Fine
• Inserts: Type S, free running, stainless steel
• Insert Standard: DIN 8140, ISO 2 (6H)
• STI Tap: STI short machine tap, Form D, HSS-G
• Packaging: Plastic case
• Item Number: 04169
• Technical PDF: V-COIL Thread Repair – Technical Information

• 1× STI Short Machine Tap, Form D, HSS-G, BSF 9/16 × 16 (03259)
• 1× Inserting tool with locking ring, No. 16 (08016)
• 10× Wire thread inserts – type S – free running – BSF 9/16 × 16 – 1.5D (08369)

Matching refill packs with additional inserts are available separately.

Which materials can be repaired?
Suitable for materials with lower shear strength such as aluminium, cast materials, brass and certain steel grades where thread reinforcement is required.

Can I repair both blind and through holes?
Yes, as long as installation depth and tang removal are properly considered, especially in blind holes.

How durable is the repaired thread?
When installed correctly, the reinforced thread is often stronger than the original base material thread.

Do I need special machines?
No. The kit is designed for manual use. Correct alignment and stable clamping of the workpiece are important.

Are other sizes available?
Yes. The V-COIL system includes a wide range of metric, BSF, BSW, UNC, UNF and special thread sizes.