The Collar,pin-Rivet, cataloged under National Stock Number 5320-01-340-0261, 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 15 specifications, cited from the U.S. Government catalog. The record lists 5 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-340-0261 |
| Primary Part Number | HST979-8 |
| Item Name | Collar,pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Lubrication | CETYL ALCOHOL |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Collar Inside Diameter | 0.257 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN |
| Collar Overall Height | 0.455 INCHES MINIMUM AND 0.476 INCHES MAXIMUM IN |
| Collar Style | THREADED (BREAK OFF) TYPE |
| Collar Outside Diameter | 0.405 INCHES MINIMUM AND 0.412 INCHES MAXIMUM IN |
| Heat Treatment | T-73 SOLUTION HEAT TREATED OVERALL |
| Material Document and Classification | QQ-A-225/9 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Surface Treatment | ANODIZE OVERALL |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | ALUMINUM ALLOY 7075 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 |
|---|---|
| BACC30BL8 | Boeing Defence Australia Ltd Div Defense, Space & Security (AUS) |
| HST979-8 PRIMARY | Hi-Shear Corporation (USA) |
| HST979-8 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HST979-8 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACC30BL8 | Boeing Defence Australia Ltd (AUS) |
| Reference | Meaning |
|---|---|
| BACC30BL8 | 7/2 Vendor item drawing reference U.S. Government activity |
| BACC30BL8 | 3/2 Design control — primary reference U.S. Government activity |
| HST79CY-8 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HST79CY-8 | 5/9 Secondary reference U.S. Government activity |
| HST79CY-8 | 5/9 Secondary reference Hi-Shear Corporation |
NSN 5320-01-340-0261 is a Collar,pin-Rivet, manufactured by Hi-Shear Corporation, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-340-0261 has 5 manufacturer part numbers on file: BACC30BL8 (Boeing Defence Australia Ltd Div Defense, Space & Security), HST979-8 (Hi-Shear Corporation), HST979-8 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HST979-8 (Sps Technologies, Llc Dba PB Fasteners), BACC30BL8 (Boeing Defence Australia Ltd).
1 possible match (shared part number, not a government interchangeability claim): 5320-01-669-4450. Verify interchangeability with system specifications before substitution.
Key specifications for HST979-8: Lubrication: CETYL ALCOHOL; Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Collar Inside Diameter: 0.257 INCHES MINIMUM AND 0.261 INCHES MAXIMUM IN; Collar Overall Height: 0.455 INCHES MINIMUM AND 0.476 INCHES MAXIMUM IN. 15 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.