The Pin-Rivet, cataloged under National Stock Number 5320-01-645-1973, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-645-1973 |
| Primary Part Number | HL448UC-8-6 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Shank Diameter | 0.2410 INCHES MINIMUM AND 0.2440 INCHES MAXIMUM IN |
| Lubrication | CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP |
| Head Height | 0.077 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN |
| Fastener Length | 0.760 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN |
| Identification Code Color | GREEN |
| Surface Treatment Document and Classification | AMS-QQ- P-416, TYPE II, CL-2 ASSN STD SINGLE TREATMENT RESPONSE WASHER |
| Material Document and Classification | AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5731 ASSN STD SINGLE MATERIAL RESPONSE WASHER |
| Head Style | STRAIGHT PAN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Grip Length | 0.370 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN |
| Width Between Flats | 0.0947 INCHES MINIMUM AND 0.0967 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Surface Treatment | CADMIUM WASHER |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING WASHER |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.415 INCHES MINIMUM AND 0.440 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 |
|---|---|
| HL448UC-8-6 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| BACB30MB8A6 | 3/2 Design control — primary reference U.S. Government activity |
| HL448 | D/9 Drawing number reference only Hi-Shear Corporation |
NSN 5320-01-645-1973 is a Pin-Rivet, manufactured by Hi-Shear Corporation, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-645-1973 has 1 manufacturer part number on file: HL448UC-8-6 (Hi-Shear Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5320-01-729-5113. Verify interchangeability with system specifications before substitution.
Key specifications for HL448UC-8-6: Shank Diameter: 0.2410 INCHES MINIMUM AND 0.2440 INCHES MAXIMUM IN; Lubrication: CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP; Head Height: 0.077 INCHES MINIMUM AND 0.090 INCHES MAXIMUM IN; Fastener Length: 0.760 INCHES MINIMUM AND 0.780 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.