The Pin-Rivet, cataloged under National Stock Number 5320-01-288-2126, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 20 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-288-2126 |
| Primary Part Number | ST3M761C08-4 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Shank Diameter | 0.1630 INCHES MINIMUM AND 0.1635 INCHES MAXIMUM IN |
| Lubrication | CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP AND SOLID FILM |
| Head Height | 0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN |
| Fastener Length | 0.552 INCHES MINIMUM AND 0.572 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 | 0.164 INCHES IN |
| Grip Length | 0.255 INCHES MAXIMUM IN |
| Width Between Flats | 0.0791 INCHES MINIMUM AND 0.0801 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 | 32 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNJC |
| Head Major Diameter | 0.306 INCHES MINIMUM AND 0.322 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-5-4 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HKT52YC-5-4 | Huck International, Inc (USA) |
| HLT52YC-5-4 | Howmet Global Fastening Systems Inc (USA) |
| HP4761-08-4 | Heartland Precision Fasteners Inc (USA) |
| HLT52YC-5-4 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HLT52YC-5-4 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT52YB-5-4 | Heartland Precision Fasteners Inc (USA) |
| HLT52YB-5-4 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT52YB-5-4 | West Coast Aerospace, Inc. (USA) |
| HLT52YB-5-4 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HLT52YB-5-4 | Huck International, Inc (USA) |
| HLT52YC-5-4 | West Coast Aerospace, Inc. (USA) |
| HLT52YC-5-4 | Huck International, Inc (USA) |
| HLT52YC-5-4 | Hi-Shear Corporation (USA) |
| ST3M761C08-4 PRIMARY | The Boeing Company Div Defense (USA) |
| 3929AS1135-C08-4 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| HLT52YB-5-4 | Hi-Shear Corporation (USA) |
| HLT52YB-5-4 | Howmet Global Fastening Systems Inc (USA) |
| HLT52YB-5-4 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HLT52YC-5-4 | Heartland Precision Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| HKT52YC-5-4 | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies Inc |
| HLT52YB-5-4 | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies Inc |
| HKT52YC-5-4 | C/1 Advisory reference — outside the item-of-supply concept Hi-Shear Corporation |
| HLT52YC-5-4 | 5/9 Secondary reference U.S. Government activity |
| MA4761-08-4 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| 10118811 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| AIC-L-761C08-4 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| HLT52YB-5-4 | 5/9 Secondary reference U.S. Government activity |
| HLT52YB-5-4 | 5/9 Secondary reference U.S. Government activity |
| HLT52YC-5-4 | 5/9 Secondary reference U.S. Government activity |
NSN 5320-01-288-2126 is a Pin-Rivet, manufactured by The Boeing Company Div Defense, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-288-2126 has 20 manufacturer part numbers on file: HLT52YC-5-4 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HKT52YC-5-4 (Huck International, Inc), HLT52YC-5-4 (Howmet Global Fastening Systems Inc), HP4761-08-4 (Heartland Precision Fasteners Inc), HLT52YC-5-4 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 15 more.
Key specifications for ST3M761C08-4: Shank Diameter: 0.1630 INCHES MINIMUM AND 0.1635 INCHES MAXIMUM IN; Lubrication: CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP AND SOLID FILM; Head Height: 0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN; Fastener Length: 0.552 INCHES MINIMUM AND 0.572 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.