The Pin-Rivet, cataloged under National Stock Number 5320-01-238-7786, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is West Coast Aerospace, Inc.. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-238-7786 |
| Primary Part Number | WC131-6AK21 |
| Item Name | Pin-Rivet |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | West Coast Aerospace, Inc. |
| Status | ACTIVE |
| Shank Diameter | 0.181 INCHES MINIMUM AND 0.184 INCHES MAXIMUM IN |
| Fastener Length | 1.6375 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | BMS10-85,TYP I MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Hole Depth | 0.115 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Head Style | FLUSH COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Grip Length | 1.3125 INCHES NOMINAL IN |
| Shoulder Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Shank Style | ERR-090 |
| Surface Treatment | ALUMINUM OVERALL |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Shoulder Length | 1.2695 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Major Diameter | 0.258 INCHES MINIMUM AND 0.305 INCHES MAXIMUM IN |
| Hole Diameter | 0.104 INCHES MINIMUM AND 0.119 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 |
|---|---|
| WC131-6AK21 PRIMARY | West Coast Aerospace, Inc. (USA) |
| L-839C-6AK21 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HL441-6AK21 PRIMARY | Hi-Shear Corporation (USA) |
| HL441-6AK21 PRIMARY | Huck International, Inc (USA) |
| HL441-6AK21 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HL441-6AK21 PRIMARY | West Coast Aerospace, Inc. (USA) |
| HL441-6AK21 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| HL441-6AK21 | 3/2 Design control — primary reference U.S. Government activity |
| HL441-6AK21 | 3/2 Design control — primary reference U.S. Government activity |
| HL441-6AK21 | 5/9 Secondary reference U.S. Government activity |
| BACB30FN6AK21 | 5/2 Secondary reference U.S. Government activity |
NSN 5320-01-238-7786 is a Pin-Rivet, manufactured by West Coast Aerospace, Inc., classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-238-7786 has 7 manufacturer part numbers on file: WC131-6AK21 (West Coast Aerospace, Inc.), L-839C-6AK21 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HL441-6AK21 (Hi-Shear Corporation), HL441-6AK21 (Huck International, Inc), HL441-6AK21 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 2 more.
Key specifications for WC131-6AK21: Shank Diameter: 0.181 INCHES MINIMUM AND 0.184 INCHES MAXIMUM IN; Fastener Length: 1.6375 INCHES NOMINAL IN; Surface Treatment Document and Classification: BMS10-85,TYP I MFR REF SINGLE TREATMENT RESPONSE OVERALL; Hole Depth: 0.115 INCHES MAXIMUM IN. 20 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.