The Collar,pin-Rivet, cataloged under National Stock Number 5320-01-535-7020, 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 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-535-7020 |
| Primary Part Number | ST3M526C4MA |
| Item Name | Collar,pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Lubrication | DRY FILM |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OVERALL |
| Collar Inside Diameter | 0.261 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Collar Overall Height | 0.520 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| Collar Style | THREADED (BREAK OFF) TYPE |
| Collar Outside Diameter | 0.408 INCHES MINIMUM AND 0.412 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| ST3M526C4MA PRIMARY | The Boeing Company Div Defense (USA) |
| 3929AS1621-4 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| SW1000-8MA | Sps Technologies, Llc Dba PB Fasteners (USA) |
| SW1000-8MA | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| SW1000-8MA | Howmet Global Fastening Systems Inc. Div Voi-Shan Products (USA) |
| SW1000-8MA | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| 10473300 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5320-01-535-7020 is a Collar,pin-Rivet, manufactured by The Boeing Company Div Defense, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-535-7020 has 6 manufacturer part numbers on file: ST3M526C4MA (The Boeing Company Div Defense), 3929AS1621-4 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), SW1000-8MA (Sps Technologies, Llc Dba PB Fasteners), SW1000-8MA (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), SW1000-8MA (Howmet Global Fastening Systems Inc. Div Voi-Shan Products) and 1 more.
Key specifications for ST3M526C4MA: Lubrication: DRY FILM; Surface Treatment Document and Classification: QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OVERALL; Collar Inside Diameter: 0.261 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN; Collar Overall Height: 0.520 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN. 14 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.