The Pin-Rivet, cataloged under National Stock Number 5320-01-278-5091, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is Heartland Precision Fasteners Inc. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 23 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-278-5091 |
| Primary Part Number | ST3M812-4-5 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Heartland Precision Fasteners Inc |
| Status | ACTIVE |
| Shank Diameter | 0.2646 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM IN |
| Lubrication | SOLID FILM OR DRY FILM AND CETYL ALCOHOL |
| Fastener Length | 0.737 INCHES MINIMUM AND 0.757 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Head Style | CROWN COUTERSUNK GREATER THAN 135 DEGREES |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Grip Length | 0.317 INCHES MAXIMUM IN |
| Width Between Flats | 0.0947 INCHES MINIMUM AND 0.0967 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Surface Treatment | PASSIVATE OVERALL |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.3898 INCHES MINIMUM AND 0.3948 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 |
|---|---|
| ST3M812-4-5 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| HLT151DL-8-5 | Hi-Shear Corporation (USA) |
| HLT151DL-8-5 | West Coast Aerospace, Inc. (USA) |
| ST3M812-4-5 PRIMARY | Huck International, Inc (USA) |
| HLT151TB-8-5 | Howmet Global Fastening Systems Inc (USA) |
| HLT151TB-8-5 | Computer Power Cabling Corp (USA) |
| HLT151TB-8-5 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT151DL-8-5 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M812-4-5 PRIMARY | West Coast Aerospace, Inc. (USA) |
| HLT151DL-8-5 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT151TB-8-5 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HLT151DL-8-5 | Computer Power Cabling Corp (USA) |
| ST3M812-4-5 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M812-4-5 PRIMARY | Hi-Shear Corporation (USA) |
| HLT151TB-8-5 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M812-4-5 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HLT151DL-8-5 | Huck International, Inc (USA) |
| HLT151TB-8-5 | West Coast Aerospace, Inc. (USA) |
| HLT151TB-8-5 | Hi-Shear Corporation (USA) |
| HLT151DL-8-5 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| HLT151TB-8-5 | 5/2 Secondary reference U.S. Government activity |
| 10118784 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| AIC-L-762-4-5 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| HLT151DL-8-5 | 5/2 Secondary reference U.S. Government activity |
| ST3M812-4-5 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HLT151DL-8-5 | 5/9 Secondary reference U.S. Government activity |
| MA4812-4-5 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| MA4812-4-5 | 5/9 Secondary reference West Coast Aerospace, Inc. |
| HLT151TB-8-5 | 5/9 Secondary reference U.S. Government activity |
NSN 5320-01-278-5091 is a Pin-Rivet, manufactured by Heartland Precision Fasteners Inc, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-278-5091 has 23 manufacturer part numbers on file: ST3M812-4-5 (Heartland Precision Fasteners Inc), HLT151DL-8-5 (Hi-Shear Corporation), HLT151DL-8-5 (West Coast Aerospace, Inc.), ST3M812-4-5 (Huck International, Inc), HLT151TB-8-5 (Howmet Global Fastening Systems Inc) and 18 more.
Key specifications for ST3M812-4-5: Shank Diameter: 0.2646 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM IN; Lubrication: SOLID FILM OR DRY FILM AND CETYL ALCOHOL; Fastener Length: 0.737 INCHES MINIMUM AND 0.757 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 18 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.