A Leading HeliCoil® Inserts Distributor...

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• HeliCoil® dimensions table
• UNC - Free Running
• UNC - Screw Lock
• UNF - Free Running
• UNF - Screw Lock

• Aero Std Interchange Brochure
• Military Standard Brochure
• Tangless Brochure

All parts are available with full certifications and dfar compliant 252.225-7014

Diamond Fasteners is an Authorized Master Stocking Distributor of:
HeliCoil® Threaded Inserts
HeliCoil® Thread Repair Kits
HeliCoil® Tools

HeliCoil® Screw Lock Inserts provide an exclusive, resilient internal locking thread that grips the bolt and prevents it from loosening under vibration or impact. Locking action is achieved by the coils of the Threaded Insert. When the bolt enters the coil it flexes outward, creating pressure on the bolt. This pressure is exerted between the flanks of the bolt thread thus utilizing the maximum contact area and minimizing the unit pressure. HeliCoil® Screw Lock Inserts permit repeated assembly and disassembly, yet will not relax their grip on the screw even in tough metals such as cast iron, alloy steel, titanium, etc.

HeliCoil® Thread Repair Kits offer complete coverage of thread repair in inch and metric sizes.

Available from stock are Inch Coarse kits in sizes #4 through 1-1/2" and Inch Fine kits in sizes #6 through 1-1/2", also Metric Coarse kits M3 through M20 and Metric Fine Kits M8 through M16.

Contact us or fill out our RFQ form to find out more.

Installation of HeliCoil® Inserts are as easy as 1,2,3 - JUST DRILL, TAP, and INSTALL!:

STEP 1: DRILL - Drill out damaged threads using the appropriate drill size. Drill to sufficient depth to accommodate the insert length and bolt or screw being used.
STEP 2: TAP - Use the appropriate Heil-Coil Tap. Check the size on your shank to make sure you have the right one. Tap the hole to sufficient depth to accommodate the insert length and bolt or screw being used.
STEP 3: INSTALL - Use the specified installation tool. Just wind the insert into the hole until the top coil is 1/4-1/2 turn into the tapped thread.

Note: Remove tang with the appropriate tool specified.

Diamond Fasteners is an ISO certified company. Click here to see our certifications.

JUST A FEW OF THE PRODUCTS DIAMOND FASTENERS PROVIDES...

Fasteners and Hardware to Mil-Spec . Aerospace & Aircraft Fasteners Standard & Special Fasteners . Self-Locking Nuts . Nut Plates Hex Nuts . Spacers . Washers . Panel Fasteners . Bolts Grommets . Handles . Retaining Rings . O-Rings . SEM Screws Vented Screws . Bearings . Clamps . Clips . Bushings . Rivets