pins › pin-rivets
HL221-8-7
Hi-Lok™Rivet Pin
Description
thread: 1/4-28, fine thread, flush, tension head, oversized for hl21, alloy steel, cadmium plated, Hi-Lok, HL221 series rivet
Specifications
| Countersink Angle | 100.0 degrees |
|---|---|
| Fastener Length | Between 0.8225 inches and 0.8425 inches |
| Grip Length | Between 0.4325 inches and 0.4425 inches |
| Head Major Diameter | Between 0.5018 inches and 0.5066 inches |
| Head Style | Flush countersunk |
| Lubrication | Hi-shear corp specification 305 cetyl alcohol |
| Material | Steel |
| Material Specification | Mil-s-5000 military specification 1st material response or mil-s-5626 military specification 2nd material response or mil-s-6049 military specification 3rd material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Shank Diameter | Between 0.2797 inches and 0.2807 inches |
| Shank Style | Threaded straight pin-rivet |
| Shear Strength | 11800 double pounds per square inch |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty ii cl 2 federal specification all treatment responses |
| Thread Class | 3a |
| Thread Direction | Right-hand |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.250 |
| Width Between Flats | Between 0.0947 inches and 0.0967 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for HL221-8-7. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error