The Pin-Rivet, cataloged under National Stock Number 5320-01-166-7981, 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 17 specifications, cited from the U.S. Government catalog. The record lists 12 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-166-7981 |
| Primary Part Number | HLT52YC-12-6 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Shank Diameter | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Lubrication | SOLID FILM AND CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP |
| Head Height | 0.130 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Fastener Length | 0.910 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Grip Length | 0.380 INCHES MAXIMUM IN |
| Width Between Flats | 0.1582 INCHES MINIMUM AND 0.1617 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Shear Strength | 125000 SINGLE POUNDS PER SQUARE INCH |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.565 INCHES MINIMUM AND 0.600 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 |
|---|---|
| HLT52YC-12-6 PRIMARY | Hi-Shear Corporation (USA) |
| HLT52YB-12-6 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HLT52YB-12-6 | West Coast Aerospace, Inc. (USA) |
| HLT52YC-12-6 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT52YB-12-6 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HLT52YC-12-6 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HLT52YC-12-6 | West Coast Aerospace, Inc. (USA) |
| HLT52YB-12-6 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT52YC-12-6 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HP4761-6-6 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| HLT52YB-12-6 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M761C6-6 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| HLT52YB-12-6 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HLT52YC-12-6 | 3/2 Design control — primary reference U.S. Government activity |
| MA4761-6-6 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| HLT52DL-12-6 | 5/9 Secondary reference Hi-Shear Corporation |
| HLT52YB-12-6 | 3/2 Design control — primary reference U.S. Government activity |
| AIC-L-761C6-6 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| HLT52YC-12-6 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HLT52YC-12-6 | 5/9 Secondary reference U.S. Government activity |
| HLT52TB12-6 | C/1 Advisory reference — outside the item-of-supply concept Hi-Shear Corporation |
| HLT52YB-12-6 | 5/9 Secondary reference U.S. Government activity |
| 10111967 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5320-01-166-7981 is a Pin-Rivet, manufactured by Hi-Shear Corporation, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-166-7981 has 12 manufacturer part numbers on file: HLT52YC-12-6 (Hi-Shear Corporation), HLT52YB-12-6 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HLT52YB-12-6 (West Coast Aerospace, Inc.), HLT52YC-12-6 (Sps Technologies, Llc Dba PB Fasteners), HLT52YB-12-6 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 7 more.
Key specifications for HLT52YC-12-6: Shank Diameter: 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN; Lubrication: SOLID FILM AND CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP; Head Height: 0.130 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; Fastener Length: 0.910 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN. 17 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.