Hi-Lok collar identification: colour, material and marks
Colour is part of a finish code on one collar page. It is not a code that holds across collars. Five Hi-Shear collar pages are on file; only what each one prints is listed.
| Collar | Material | Use | Colours the page prints |
|---|---|---|---|
| HL70 | 2024-T6 aluminum alloy | Shear |
|
| HL79 | 2024-T6 aluminum alloy | Shear |
|
| HL94 | Type 303 Se stainless steel | Shear |
|
| HL97 | A-286 high temperature alloy | Shear |
|
| HL86 | Type 303 Se stainless steel | Tension |
|
"Collar as" means the page gives that code's collar finish by reference to the code named. The other finish codes on these pages print a plating or a lube and no colour word. Sources: Hi-Shear HL70 collar drawing p.1, Hi-Shear HL79 collar drawing p.1, Hi-Shear HL94 collar drawing p.1, Hi-Shear HL97 collar drawing p.1, Hi-Shear HL86 collar drawing p.1
Colour alone does not identify the collar
- HL70-( ) and HL79-( ) are both dyed red, so red alone does not tell the two collars apart. Hi-Shear HL70 collar drawing p.1
- Green is printed for an aluminum collar (HL79GG) and for an A-286 collar (HL97KG, HL97DJ). Hi-Shear HL97 collar drawing p.1
None of the five pages identifies a collar by colour. Each identifies it by part number and finish code.
The aircraft's structural repair manual and the manufacturer's installation instructions govern.
Reference only: the controlling drawing, its process spec and the manufacturer's installation instructions govern. How to use these answers
HL70: 2024-T6 aluminum alloy, shearfinish and marks
Title block: “2024 - T6 ALUMINUM ALLOY” Hi-Shear HL70 collar drawing p.1“1/16" GRIP VARIATION - SHEAR APPLICATION” Hi-Shear HL70 collar drawing p.1
HL70-( ): “Anodize per MIL-A-8625, dye color red, and cetyl alcohol lube per Hi-Shear Spec. 305.” Hi-Shear HL70 collar drawing p.1
HL70TT-( ): “Anodize per MIL-A-8625, dye color red and translube.” Hi-Shear HL70 collar drawing p.1
HL70DTW-( ): “Washer finish is anodize per MIL-A-8625, dye color grey, or blue (for 2024 only).” Hi-Shear HL70 collar drawing p.1
HL70TW-( ): “Washer finish is anodize per MIL-A-8625. dye color grey, or blue (for (2024 only).” Hi-Shear HL70 collar drawing p.1
HL70NW-( ): “Collar finish is the same as HL70-( ). Washer is passivated.” Hi-Shear HL70 collar drawing p.1
HL70TW-( ): “Collar finish same as HL70-( ).” Hi-Shear HL70 collar drawing p.1
HL79: 2024-T6 aluminum alloy, shearfinish and marks
Title block: “2024-T6 ALUMINUM ALLOY” Hi-Shear HL79 collar drawing p.1“FOR USE ON STANDARD AND 1/64" OVERSIZE HI-LOK PINS” Hi-Shear HL79 collar drawing p.1
HL79-( ): “Anodize per MIL-A-8625, dye color red, and cetyl alcohol lube per Hi-Shear Spec. 305.” Hi-Shear HL79 collar drawing p.1
HL79GG( ): “Anodize per MIL-A-8625, dye color green, and cetyl alcohol lube per Hi-Shear Spec. 305.” Hi-Shear HL79 collar drawing p.1
Marks the page draws
- “IDENTIFICATION GROOVE” Hi-Shear HL79 collar drawing p.1
HL94: Type 303 Se stainless steel, shearfinish and marks
Title block: “TYPE 303 Se STAINLESS STEEL” Hi-Shear HL94 collar drawing p.1“FOR USE ON STANDARD AND 1/64" OVERSIZE HI-LOK PINS” Hi-Shear HL94 collar drawing p.1
HL94-( ): “Cadmium plate per QQ-P-416, Type II, Class 2, and cetyl alcohol lube per Hi-Shear Spec. 305.” Hi-Shear HL94 collar drawing p.1
HL94PK-( ): “Cadmium plate per QQ-P-416 (olive drab color), Type II, Class 2, and cetyl alcohol lube per Hi-Shear Spec. 305.” Hi-Shear HL94 collar drawing p.1
Marks the page draws
- “IDENTIFICATION GROOVE” Hi-Shear HL94 collar drawing p.1
- “1 raised bead indicates VOI-SHAN identification.” Hi-Shear HL94 collar drawing p.1
- “2 raised beads indicate STANDARD PRESSED STEEL identification.” Hi-Shear HL94 collar drawing p.1
HL97: A-286 high temperature alloy, shearfinish and marks
Title block: “A-286 HIGH TEMPERATURE ALLOY” Hi-Shear HL97 collar drawing p.1“1/16" GRIP VARIATION, SHEAR APPLICATION” Hi-Shear HL97 collar drawing p.1
HL97-( ): “Collar only with silver plate per AMS2410 (.0002-.0004 thick) and cetyl alcohol lube per Hi-Shear Spec. 305.” Hi-Shear HL97 collar drawing p.1
HL97DJ( ): “Collar only with solid film lube per AS5272, Type I plus green identification on body of collar.” Hi-Shear HL97 collar drawing p.1
HL97DU( ): “Collar only with solid film lube per AS5272, Type I plus yellow MIL-P-23377 identification on body of collar.” Hi-Shear HL97 collar drawing p.1
HL97KG( ): “Collar only with cadmium plate per AMS-QQ-P-416, Type II, Class 2, color green, and cetyl alcohol lube per Hi-Shear Spec. 305.” Hi-Shear HL97 collar drawing p.1
HL97DUW( ): “Collar finish the same as HL97DU( ), and washer with cadmium plate per AMS-QQ-P-416, Type II, Class 2.” Hi-Shear HL97 collar drawing p.1
HL97DUWU( ): “Collar finish the same as HL97DU( ), and washer with passivate per Hi-Shear Spec. 258.” Hi-Shear HL97 collar drawing p.1
HL97KGW( ): “Collar finish the same as HL97KG( ), and washer with passivate per Hi-Shear Spec. 258.” Hi-Shear HL97 collar drawing p.1
HL86: Type 303 Se stainless steel, tensionfinish and marks
Title block: “TYPE 303 Se STAINLESS STEEL” Hi-Shear HL86 collar drawing p.1“1/16" GRIP VARIATION, TENSION APPLICATION” Hi-Shear HL86 collar drawing p.1
HL86-( ): “Collar only with cadmium plate per AMS-QQ-P-416, Type I, Class 2 and cetyl alcohol lube per Hi-Shear Spec. 305.” Hi-Shear HL86 collar drawing p.1
HL86KP( ): “Collar only with cadmium plate per AMS-QQ-P-416, Type II, Class 2, color violet to purple, and cetyl alcohol lube per Hi-Shear Spec. 305.” Hi-Shear HL86 collar drawing p.1
HL86TW( ): “aluminum washer anodize per AMS-A-8625, dye color blue (sizes -5 through -12 only).” Hi-Shear HL86 collar drawing p.1
HL86KPW( ): “Collar finish the same as HL86KP( ), and steel washer with cadmium plate per AMS-QQ-P-416, Type II, Class 2.” Hi-Shear HL86 collar drawing p.1
Reading the collar part numberdash number
- “Dash number indicates nominal thread size in 1/32nds.” Hi-Shear HL79 collar drawing p.1
- “The self-locking, threaded Hi-Lok collar has an internal counterbore at the base to accommodate variations in material thickness.” Hi-Shear Hi-Lok instructions p.1
- “At the opposite end of the collar is a wrenching device which is torqued by the driving tool until it shears off during installation” Hi-Shear Hi-Lok instructions p.1
- “In the collar part number HL70-8, the dash number indicates the inside nominal diameter of the collar in 1/32" increments.” Hi-Shear Hi-Lok instructions p.7
Hi-Shear's general pin and collar pairingnot a substitution table
- “It is very important that the proper Hi-Lok collar be used with the selected Hi-Lok pin head style (shear or tension types) to maintain a proper design balance between the pin and collar.” Hi-Shear Hi-Lok instructions p.2
- “Refer to Hi-Lok or Hi-Lok/Hi-Tigue standards pages for recommended pin-collar combinations or contact your Standards Engineer.” Hi-Shear Hi-Lok instructions p.2
- “In general, the following pin-collar combinations are acceptable:” Hi-Shear Hi-Lok instructions p.2
- “Use aluminum collars (such as HL79 or HL70) with shear head pins made from materials such as alloy steel or titanium.” Hi-Shear Hi-Lok instructions p.2
- “In some cases low torque-off type steel collars (such as HL94) are used with shear head pins.” Hi-Shear Hi-Lok instructions p.2
- “Where tensile strength is a factor, use tension head pins with higher torque-off collars such as HL86.” Hi-Shear Hi-Lok instructions p.2
- “When the Hi-Tigue version of the Hi-Lok system is used, a Hi-Tigue type collar should be used with a Hi-Tigue type pin.” Hi-Shear Hi-Lok instructions p.2
An installed collarwhat is left
- “REMAINING PORTION OF HI-LOK COLLAR AFTER ASSEMBLY” Hi-Shear HL10 drawing p.sheet 1
- “Hi-Lok fasteners are visually inspected. No inspection tools or torque wrenches are required.” Hi-Shear Hi-Lok instructions p.11
Related: Hi-Lok collar removal · Identify a fastener from its head and tail · Hi-Lok family, with collar CAD
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