HI-LOK™ Collars

Products Configurator

 

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CAD files now available to download for drawings identified with a logo in products configurators.

Description

The HI-LOK™ fastening system consists of two parts, a threaded pin and a threaded collar. It combines the best features of a rivet and a bolt-nut system.

Features

The HI-LOK™ collar was designed to consistently repeat preload on each fastener. The wrenching element breaks away at the designed preload. Preload consistency among fasteners in a joint was a long standing need in the industry. It also eliminated the need for torque inspection and torque wrench calibration. The new threaded collar allows for progressive tightening, clamping up the work prior to torque-off.

The elimination of the wrenching surfaces at torque-off results in weight savings of the fastener and wrenching clearances minimized result in weight savings due to more compact fittings and joints.

The HI-LOK™ collar is self-locking using an elliptical internal thread shape.

In exhaustive tests and in actual application, the HI-LOK™ fastening system has met the highest standards of reliability.

Product Selection

The HI-LOK™ technology is availble on inch (HL) and M metric (HLM) collars.

HI-LOK™ collars can be simple or double-hex. Simple collars are tamper proof and require a specific tool to be removed. Double-hex collars can be removed using the same tool than the installation. They also allow for a pre-torque tightening, then a final torque installation when the frangile part shears off.

The collars can be made of several materials to accomodate shear or tension applications.

Simple	Double-hex
		Plain Plain and slope surface up to 0.5°
		Self-aligning Slope surface up to 7°
		Self-sealing

The HI-LOK™ self-aligning collars retain all the physical properties of basic collars, with the additional feature of adapting to a sloped surface up to a maximum of 7°, eliminating the need for spot facing.

The HI-LOK™ self-sealing collar incorporates an insert fitted into the internal counter-bore of the collar. During installation the insert flows to provide positive sealing in the thread-to-shank transition area of the fastener. No other sealing or caulking compound is necessary.

The HI-LOK™ Reduced-hex collar provides more clearance for installation and allows reduced edge-distance.

HI-LOK is a trademark of Hi-Shear Corporation.

Licensed Manufacturers

In order to provide the best quality for our products, HI-LOK™ collars are only manufactured by licensed suppliers. Supplier list can be found here:

Configurator

Material Thread_x0020_Type Double_x002d_hex Self_x002d_aligning Sealing Application nominal_size_shank _x0031_st_oversize_shank _x0032_nd_oversize_shank _x0033_rd_oversize_shank Is_x0020_Custom 2024-T6 Aluminum UNJ No No No Shear HL70 HL79 HL84 HL279 False 17-4PH Stainless Steel UNJ No No No Tension HL73 HL273 HL373   False 300 series Stainless Steel UNJ No Yes No Tension HL75 HL75 HL375   False 2024-T6 Aluminum UNJ No No No Shear HL77 HL377 HL377   True A-286 UNJ No No No Tension HL78 HL278 HL478   False 2024-T6 Aluminum UNJ No Yes No Shear HL82 HL82 HL382   False 300 series Stainless Steel UNJ No No No Tension HL86 HL87 HL93 HL287 False 17-4PH Stainless Steel UNJ No Yes No Tension HL89 HL89 HL289   False 300 series Stainless Steel UNJ No No No Shear HL94 HL94 HL294 HL394 False A-286 UNJ No No No Shear HL97   HL197   False 300 series Stainless Steel UNJ No Yes No Shear HL175 HL175     False A-286 UNJ No No No Shear HL185 HL185     False 6AL-4V Titanium UNJ No No No Tension HL198 HL198     False 2024-T6 Aluminum UNJ No No Yes Shear HL374 HL374     False 6AL-4V Titanium UNJ No No No Special HL379 HL379     True 300 series Stainless Steel UNJ No No No Tension HL1087 HL1087 HL93 HL287 False 300 series Stainless Steel UNJ No Yes No Shear HL1094 HL1094     True 2024-T6 Aluminum M No No No Shear HLM70 HLM370 HLM370   True 17-4PH Stainless Steel M No No No Tension HLM73 HLM373 HLM373   True 300 series Stainless Steel M No No No Tension HML75 HLM375 HLM375   True A-286 M No No No Tension HLM78 HLM378 HLM378   True 2024-T6 Aluminum M Yes No Yes Shear HLM80       True 2024-T6 Aluminum M No Yes No Shear HLM82 HLM382 HLM382   True 300 series Stainless Steel M No No No Tension HLM86 HLM386 HLM386   True 17-4PH Stainless Steel M No Yes No Tension HLM89 HLM389 HLM389   True 300 series Stainless Steel M No No No Shear HLM94 HLM394 HLM394   True Any additionnal inquiries? R&D Contact (Missing drawings / CAD files) Regular Drawings Custom Drawings HST1072_XXX_HST1076_XXX_HST1084_XXX_HST1087_XXX_HST1094_XXX_HST1096_XXX_HST1275_XXX_HST1384_XXX_HST1385_XXX_HST1479_XXX_HST1487_XXX_HST1488_XXX_HST185_XXX_HST71_XXX_HST73_XXX_HST74_XXX_HST75_XXX_HST771_XXX_HST78_XXX_HST79_XXX_HST82_XXX_HST97_XXX_HST645_XXX_HST647_XXX_HST13_XXX_HST48_XXX_HST646_XXX_HST49_XXX_HST12_XXX_HST59_XXX_HST18_XXX_HST21_XXX_HST536_XXX_HST20_XXX_HST54_XXX_HST52_XXX_HST19_XXX_HST40_XXX_HST57_XXX_HST41_XXX_HST10_XXX_HST11_XXX_HST644_XXX_HL175_XXX_HL185_XXX_HL198_XXX_HL275_XXX_HL280_XXX_HL379_XXX_HL70_XXX_HL73_XXX_HL75_XXX_HL78_XXX_HL82_XXX_HL86_XXX_HL89_XXX_HL94_XXX_HL97_XXX_HL19_XXX_HL40_XXX_HL18_XXX_HL13_XXX_HL12_XXX_HL21_XXX_HL11_XXX_HL20_XXX_HL10_XXX_HL49_XXX_HL48_XXX_HL41_XXX_HST1072_XXX_HST1076_XXX_HST1084_XXX_HST1087_XXX_HST1094_XXX_HST1096_XXX_HST1275_XXX_HST1384_XXX_HST1385_XXX_HST1479_XXX_HST1487_XXX_HST1488_XXX_HST185_XXX_HST71_XXX_HST73_XXX_HST74_XXX_HST75_XXX_HST771_XXX_HST78_XXX_HST79_XXX_HST82_XXX_HST97_XXX_HST645_XXX_HST647_XXX_HST13_XXX_HST48_XXX_HST646_XXX_HST49_XXX_HST12_XXX_HST59_XXX_HST18_XXX_HST21_XXX_HST536_XXX_HST20_XXX_HST54_XXX_HST52_XXX_HST19_XXX_HST40_XXX_HST57_XXX_HST41_XXX_HST10_XXX_HST11_XXX_HST644_XXX_HL175_XXX_HL185_XXX_HL198_XXX_HL275_XXX_HL280_XXX_HL379_XXX_HL70_XXX_HL73_XXX_HL75_XXX_HL78_XXX_HL82_XXX_HL86_XXX_HL89_XXX_HL94_XXX_HL97_XXX_HL19_XXX_HL40_XXX_HL18_XXX_HL13_XXX_HL12_XXX_HL21_XXX_HL11_XXX_HL20_XXX_HL10_XXX_HL49_XXX_HL48_XXX_HL41_XXX_