HL221 at a glance
Where to buy
Specification
| Item | Value |
|---|---|
| Type | Hi-Lok pin, 100° flush tension head, 1/32 oversize |
| Material | Alloy steel |
| Strength | 95,000 psi shear; 160,000-180,000 psi tensile |
| Status | Check the current issue before design use. |
Dimensions by size
| Dimension, in | 10-32-UNJF-3A Modified | 1/4-28UNJF-3A Modified |
|---|---|---|
| Nominal diameter | 7/32 | 9/32 |
| A — Head diameter (max / min) | .3813 – .3765 | .5066 – .5018 |
| B — Ref. (see drawing) | .325 | .395 |
| D — Shank diameter (max / min) | .2182 – .2172 | .2807 – .2797 |
| TD — Threaded-end diameter (max / min) | .1840 – .1810 | .2440 – .2410 |
| H — H (max / min, see drawing) | .0684 – .0664 | .0948 – .0928 |
| Thread | 10-32-UNJF-3A Modified | 1/4-28UNJF-3A Modified |
| Double shear, lb min | 7,100 | 11,800 |
| Tension, lb min | 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.
7/3210 part numbers
| Part no. | Max grip, in |
|---|---|
| HL221-6-3 | 3/16 |
| HL221-6-4 | 1/4 |
| HL221-6-5 | 5/16 |
| HL221-6-6 | 3/8 |
| HL221-6-7 | 7/16 |
| HL221-6-8 | 1/2 |
| HL221-6-9 | 9/16 |
| HL221-6-10 | 5/8 |
| HL221-6-11 | 11/16 |
| HL221-6-12 | 3/4 |
9/3210 part numbers
| Part no. | Max grip, in |
|---|---|
| HL221-8-3 | 3/16 |
| HL221-8-4 | 1/4 |
| HL221-8-5 | 5/16 |
| HL221-8-6 | 3/8 |
| HL221-8-7 | 7/16 |
| HL221-8-8 | 1/2 |
| HL221-8-9 | 9/16 |
| HL221-8-10 | 5/8 |
| HL221-8-11 | 11/16 |
| HL221-8-12 | 3/4 |
Part number
What each code means
| Part | Meaning |
|---|---|
| Format | HL221-<dash> |
| Example | HL221-6-3 — 7/32 nominal diameter, max grip 3/16 in |
Notes from the standard
- The -5 size is not listed for this oversize pin: the catalogue says use HL65PB6.
- 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: HL93.
Where to buy
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Distributors coming soon.
Sources
- HL221 — Hi-Lok Pin, 100° Flush Tension Head, 1/32 Oversize for HL21, 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.