The Pin-Rivet, cataloged under National Stock Number 5320-01-685-9599, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-685-9599 |
| Primary Part Number | HL645LL-6-21 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Shank Diameter | 0.1810 INCHES MINIMUM AND 0.1840 INCHES MAXIMUM IN |
| Lubrication | CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP |
| Head Height | 0.0450 INCHES MINIMUM AND 0.0470 INCHES MAXIMUM IN |
| Fastener Length | 1.6275 INCHES MINIMUM AND 1.6475 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Head Style | FLUSH COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Grip Length | 1.3075 INCHES MINIMUM AND 1.3175 INCHES MAXIMUM IN |
| Width Between Flats | 0.104 INCHES MINIMUM AND 1.119 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Surface Treatment | PASSIVATE OVERALL |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Shear Strength | 7060 DOUBLE POUNDS PER SQUARE INCH |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.3016 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| HL645LL-6-21 PRIMARY | Hi-Shear Corporation (USA) |
| HL645LL-6-21 | West Coast Aerospace, Inc. (USA) |
| HL645LL-6-21 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HL645LL-6-21 | Blanc Aero Industries Uk Ltd (GBR) |
| Reference | Meaning |
|---|---|
| HL645 | D/9 Drawing number reference only Hi-Shear Corporation |
NSN 5320-01-685-9599 is a Pin-Rivet, manufactured by Hi-Shear Corporation, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-685-9599 has 4 manufacturer part numbers on file: HL645LL-6-21 (Hi-Shear Corporation), HL645LL-6-21 (West Coast Aerospace, Inc.), HL645LL-6-21 (Sps Technologies, Llc Dba PB Fasteners), HL645LL-6-21 (Blanc Aero Industries Uk Ltd).
4 possible matches (shared part number, not a government interchangeability claim): 5320-01-685-9606, 5320-01-685-9611, 5320-01-685-9626. Verify interchangeability with system specifications before substitution.
Key specifications for HL645LL-6-21: Shank Diameter: 0.1810 INCHES MINIMUM AND 0.1840 INCHES MAXIMUM IN; Lubrication: CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP; Head Height: 0.0450 INCHES MINIMUM AND 0.0470 INCHES MAXIMUM IN; Fastener Length: 1.6275 INCHES MINIMUM AND 1.6475 INCHES MAXIMUM IN. 19 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.