HL77 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | Hi-Lok collar, shear |
| Material | 2024-T6 aluminum alloy |
| Strength | Shear application |
| Status | Check the current issue before design use. |
Dimensions by size
| Dimension, in | 8-32UNJC-3B | 10-32UNJF-3B | 1/4-28UNJF-3B | 5/16-24UNJF-3B |
|---|---|---|---|---|
| Pin nominal diameter | 5/32 | 3/16 | 1/4 | 5/16 |
| A — Collar diameter (max / min) | .292 – .288 | .307 – .303 | .412 – .408 | .518 – .512 |
| B — Bore diameter (max / min) | .173 – .166 | .200 – .192 | .261 – .252 | .325 – .314 |
| L — Length | .447 – .427 | .457 – .437 | .552 – .532 | .672 – .652 |
| Thread | 8-32UNJC-3B | 10-32UNJF-3B | 1/4-28UNJF-3B | 5/16-24UNJF-3B |
| Collar UTS, lb min | 1,400 | 1,600 | 3,000 | 5,000 |
| Torque-off, in-lb | 10-20 | 20-30 | 55-70 | 100-125 |
| Tension preload, lb min | 350 | 500 | 1,000 | 1,650 |
Dimensions as tabulated in the catalogue, by dash number (pin nominal diameter). Max – min where a tolerance is shown.
Part numbers
Every collar dash number listed, by pin diameter.
Part number
What each code means
| Part | Meaning |
|---|---|
| Format | HL77-<dash> |
| Example | HL77-5 — 5/32 nominal pin diameter |
Notes from the standard
- Tension preload minimums by size are tabulated for this collar: 350, 500, 1,000 and 1,650 lb.
- Max – min values shown as max – min. Approved data governs.
- Pins this collar is listed for in the catalogue: standard-size aluminum alloy pins (HL22, HL23).
Where to buy
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Distributors coming soon.
Sources
- HL77 — Hi-Lok Collar, Shear, Aluminum Alloy, for Standard-Size Pins — nominal sizes and part numbers.
Educational reference only. not approved data. Always consult the applicable SRM, AMM, or AC 43.13-1B and your certifying authority.