The Pin-Rivet, cataloged under National Stock Number 5320-01-541-5175, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 18 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-541-5175 |
| Primary Part Number | HLT631YB-12-19 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Shank Diameter | 0.374 INCHES NOMINAL IN |
| Fastener Length | 1.723 INCHES MINIMUM AND 1.743 INCHES MAXIMUM IN |
| Head Style | FLUSH COUNTERSUNK |
| Nominal Thread Size | 0.375 INCHES IN |
| Grip Length | 1.183 INCHES MINIMUM AND 1.193 INCHES MAXIMUM IN |
| Width Between Flats | 0.158 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.555 INCHES MINIMUM AND 0.560 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 |
|---|---|
| HLT631YB-12-19 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HLT631YB-12-19 PRIMARY | Huck International, Inc (USA) |
| ST3M758D6-19 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HLT631YC-12-19 | West Coast Aerospace, Inc. (USA) |
| HLT631YB-12-19 | West Coast Aerospace, Inc. (USA) |
| HLT631YC-12-19 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HLT631YB-12-19 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| AIC-L-771-12-19 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HLT632YC-12-19 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HLT631YC-12-19 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HLT631YC-12-19 PRIMARY | Huck International, Inc (USA) |
| HLT631YB-12-19 PRIMARY | Hi-Shear Corporation (USA) |
| HLT631YC-12-19 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT632YC-12-19 PRIMARY | Hi-Shear Corporation (USA) |
| HLT631YB-12-19 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HP4758D6-19 | Heartland Precision Fasteners Inc (USA) |
| HLT631YB-12-19 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M758D6-19 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| HLT631YB-12-19 | 5/2 Secondary reference U.S. Government activity |
| HLT631YB-12-19 | 5/9 Secondary reference Sps Technologies Inc |
| HLT631YC-12-19 | 3/2 Design control — primary reference U.S. Government activity |
| HLT631YC-12-19 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5320-01-541-5175 is a Pin-Rivet, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-541-5175 has 18 manufacturer part numbers on file: HLT631YB-12-19 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HLT631YB-12-19 (Huck International, Inc), ST3M758D6-19 (Fastener Innovation Technology, Inc. Dba F I T), HLT631YC-12-19 (West Coast Aerospace, Inc.), HLT631YB-12-19 (West Coast Aerospace, Inc.) and 13 more.
Key specifications for HLT631YB-12-19: Shank Diameter: 0.374 INCHES NOMINAL IN; Fastener Length: 1.723 INCHES MINIMUM AND 1.743 INCHES MAXIMUM IN; Head Style: FLUSH COUNTERSUNK; Nominal Thread Size: 0.375 INCHES IN. 13 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.