HL21 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | Hi-Lok pin, 100° flush tension head |
| Material | Alloy steel |
| Strength | 160,000-180,000 psi tensile |
| Status | Check the current issue before design use. |
Dimensions by size
| Dimension, in | 8-32UNJC-3A Modified | 10-32-UNJF-3A Modified | 1/4-28UNJF-3A Modified |
|---|---|---|---|
| Nominal diameter | 5/32 | 3/16 | 1/4 |
| A — Head diameter (max / min) | .3304 – .3256 | .3813 – .3765 | .5066 – .5018 |
| B — Ref. (see drawing) | .312 | .325 | .395 |
| D — Shank diameter (max / min) | .1635 – .1625 | .1895 – .1885 | .2495 – .2485 |
| TD — Threaded-end diameter (max / min) | .1595 – .1570 | .1840 – .1810 | .2440 – .2410 |
| H — H (max / min, see drawing) | .0700 – .0680 | .0805 – .0785 | .1080 – .1060 |
| Thread | 8-32UNJC-3A Modified | 10-32-UNJF-3A Modified | 1/4-28UNJF-3A Modified |
| Double shear, lb min | 4,010 | 5,380 | 9,300 |
| Tension, lb min | 2,180 | 3,180 | 5,820 |
Dimensions as tabulated in the catalogue, by first dash number (nominal diameter). Max – min where a tolerance is shown.
Part numbers
Every part number, grouped by nominal diameter; the number after the second dash is the max grip in 1/16 in.
5/3213 part numbers
| Part no. | Max grip, in |
|---|---|
| HL21PB5-2 | 1/8 |
| HL21PB5-3 | 3/16 |
| HL21PB5-4 | 1/4 |
| HL21PB5-5 | 5/16 |
| HL21PB5-6 | 3/8 |
| HL21PB5-7 | 7/16 |
| HL21PB5-8 | 1/2 |
| HL21PB5-9 | 9/16 |
| HL21PB5-10 | 5/8 |
| HL21PB5-11 | 11/16 |
| HL21PB5-12 | 3/4 |
| HL21PB5-13 | 13/16 |
| HL21PB5-14 | 7/8 |
3/1613 part numbers
| Part no. | Max grip, in |
|---|---|
| HL21PB6-2 | 1/8 |
| HL21PB6-3 | 3/16 |
| HL21PB6-4 | 1/4 |
| HL21PB6-5 | 5/16 |
| HL21PB6-6 | 3/8 |
| HL21PB6-7 | 7/16 |
| HL21PB6-8 | 1/2 |
| HL21PB6-9 | 9/16 |
| HL21PB6-10 | 5/8 |
| HL21PB6-11 | 11/16 |
| HL21PB6-12 | 3/4 |
| HL21PB6-13 | 13/16 |
| HL21PB6-14 | 7/8 |
1/413 part numbers
| Part no. | Max grip, in |
|---|---|
| HL21PB8-2 | 1/8 |
| HL21PB8-3 | 3/16 |
| HL21PB8-4 | 1/4 |
| HL21PB8-5 | 5/16 |
| HL21PB8-6 | 3/8 |
| HL21PB8-7 | 7/16 |
| HL21PB8-8 | 1/2 |
| HL21PB8-9 | 9/16 |
| HL21PB8-10 | 5/8 |
| HL21PB8-11 | 11/16 |
| HL21PB8-12 | 3/4 |
| HL21PB8-13 | 13/16 |
| HL21PB8-14 | 7/8 |
Part number
What each code means
| Part | Meaning |
|---|---|
| Format | HL21PB<dash> |
| Example | HL21PB5-2 — 5/32 nominal diameter, max grip 1/8 in |
Notes from the standard
- Approved data governs. Use the pin the drawing, SRM or IPC calls for.
- Grip: the number after the second dash is the max grip in 1/16 in (dash -2 = 1/8 in, -3 = 3/16 in, and so on). Maximum-minimum values are shown as max – min.
- Collars listed for this pin in the catalogue quick-reference chart: HL75, HL86, HL87.
Where to buy
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Distributors coming soon.
Sources
- HL21 — Hi-Lok Pin, 100° Flush Tension Head, Alloy Steel — 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.