The Pin-Rivet, cataloged under National Stock Number 5320-01-026-0973, 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 20 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-026-0973 |
| Primary Part Number | HL551-12-24 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Shank Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Lubrication | CETYL ALCOHOL |
| Fastener Length | 2.090 INCHES MINIMUM AND 2.110 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 4TH MATERIAL RESPONSE OVERALL |
| Head Style | FLUSH COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Grip Length | 1.525 INCHES MAXIMUM IN |
| Width Between Flats | 0.1582 INCHES MINIMUM AND 0.1617 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Shear Strength | 95000 SINGLE POUNDS PER SQUARE INCH |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP E4340 OR STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.5554 INCHES MINIMUM AND 0.5604 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 |
|---|---|
| HL551-12-24 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| AIC-L-249A12C24 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HL551-12-24 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| HL551-12-24 PRIMARY | Hi-Shear Corporation (USA) |
| HL551-12-24 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HL551-12-24 | Satair A/s (DNK) |
| Reference | Meaning |
|---|---|
| HL551-12-24 | 5/2 Secondary reference U.S. Government activity |
| HL551-12-24 | 5/9 Secondary reference U.S. Government activity |
| 3M249A6-24 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HL551-12-24 | 5/9 Secondary reference U.S. Government activity |
| HL551-12-24 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5320-01-026-0973 is a Pin-Rivet, manufactured by Hi-Shear Corporation, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-026-0973 has 6 manufacturer part numbers on file: HL551-12-24 (Sps Technologies, Llc Dba PB Fasteners), AIC-L-249A12C24 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HL551-12-24 (Fairchild Fasteners Europe - Vsd Gmbh), HL551-12-24 (Hi-Shear Corporation), HL551-12-24 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 1 more.
Key specifications for HL551-12-24: Shank Diameter: 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN; Lubrication: CETYL ALCOHOL; Fastener Length: 2.090 INCHES MINIMUM AND 2.110 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 20 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.