The Pin-Rivet, cataloged under National Stock Number 5320-01-170-6334, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. 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through both NSN and commercial part number lookups. 23 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5320-01-170-6334 |
| Primary Part Number | HLT51YB-6-4 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Shank Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Lubrication | SOLID FILM AND CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP |
| Fastener Length | 0.565 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN |
| 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 | 0.190 INCHES IN |
| Grip Length | 0.255 INCHES MAXIMUM IN |
| Width Between Flats | 0.0791 INCHES MINIMUM AND 0.0806 INCHES MAXIMUM IN |
| Shank Style | PIN-RIVET, STRAIGHT, THREADED |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| 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 | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.3016 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 |
|---|---|
| HLT51YB-6-4 PRIMARY | Huck International, Inc (USA) |
| HLT51YB-6-4 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HLT51YB-6-4 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HLT51YB-6-4 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HLT51TB-6-4 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HLT51YC-6-4 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HLT51DL-6-4 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HLT51YB-6-4 | West Coast Aerospace, Inc. (USA) |
| HLT51YC-6-4 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M758C3-4 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HLT51YB-6-4 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HLT51YB-6-4 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HLT51DL-6-4 | 5/9 Secondary reference Hi-Shear Corporation |
| HLT51YC-6-4 | 5/9 Secondary reference U.S. Government activity |
| HLT51DL-6-4 | 5/9 Secondary reference U.S. Government activity |
| HP4758-3-4 | 5/9 Secondary reference Heartland Precision Fasteners Inc |
| HLT51YC-6-4 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| AIC-L-758C3-4 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| 3929AS1132-C3-4 | 7/2 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| HLT51YB-6-4 | 5/9 Secondary reference U.S. Government activity |
| HLT51DL-6-4 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| MA4758-3-4 | 5/9 Secondary reference Abounding Security Inc Div of Maa Corp |
| ST3M758C3-4 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| 10112043 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HLT51YC-6-4 | 5/9 Secondary reference West Coast Aerospace, Inc. |
| HLT51TB-6-4 | 5/9 Secondary reference U.S. Government activity |
| HLT51YC-6-4 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HLT51TB-6-4 | 5/9 Secondary reference Hi-Shear Corporation |
| HLT51TB-6-4 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HLT51YC-6-4 | 5/9 Secondary reference Hi-Shear Corporation |
| HLT51YC-6-4 | 5/9 Secondary reference Huck International, Inc |
| HLT51YC-6-4 | 5/9 Secondary reference U.S. Government activity |
NSN 5320-01-170-6334 is a Pin-Rivet, manufactured by Huck International, Inc, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-170-6334 has 12 manufacturer part numbers on file: HLT51YB-6-4 (Huck International, Inc), HLT51YB-6-4 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HLT51YB-6-4 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HLT51YB-6-4 (Sps Technologies Ltd, Tj Brooks Division), HLT51TB-6-4 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 7 more.
1 possible match (shared part number, not a government interchangeability claim): 5935-01-469-1057. Verify interchangeability with system specifications before substitution.
Key specifications for HLT51YB-6-4: Shank Diameter: 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN; Lubrication: SOLID FILM AND CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP; Fastener Length: 0.565 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN; Material Document and Classification: AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.