The Rivet,blind, cataloged under National Stock Number 5320-01-080-6648, is classified within Federal Supply Class 5320 (Rivets) of the Hardware and Abrasives group. The manufacturer of record is Bisco Industries Inc Dba National Precision Products Company Div National Precision Products. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5320-01-080-6648 |
| Primary Part Number | MK636BS |
| Item Name | Rivet,blind |
| FSC / FSG | 5320 / 53 — Rivets |
| Manufacturer | Bisco Industries Inc Dba National Precision Products Company Div National Precision Products |
| Status | ACTIVE |
| Shank Diameter | 0.187 INCHES NOMINAL IN |
| Fastener Length | 0.360 INCHES NOMINAL IN |
| Expansion Device | PLAIN STEM-TYPE T |
| Surface Treatment Document and Classification | QQ-Z-325 FED SPEC SINGLE TREATMENT RESPONSE BODY |
| Surface Treatment Document and Classification | QQ-Z-325 FED SPEC SINGLE TREATMENT RESPONSE MANDREL |
| Material Document and Classification | QQ-N-281 FED SPEC ALL MATERIAL RESPONSES BODY |
| Head Style | FLUSH (FLAT) COUNTERSUNK (INCLUDED ANGLE - LESS THAN 135 DEG W OR W/O CHAMFER) |
| Grip Length | 0.181 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN |
| Shank Style | SELF-PLUGGING |
| Surface Treatment | ZINC BODY |
| Surface Treatment | ZINC MANDREL |
| Countersink Angle | 120.0 DEGREES NOMINAL |
| Material | NICKEL ALLOY R-405 OR NICKEL ALLOY 400 BODY |
| Material | STEEL COMP 1025 MANDREL |
| Head Major Diameter | 0.320 INCHES NOMINAL 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 |
|---|---|
| MK636BS PRIMARY | Bisco Industries Inc Dba National Precision Products Company Div National Precision Products (USA) |
| Reference | Meaning |
|---|---|
| MK636BS | 5/9 Secondary reference Pop Fasteners a Black and Decker Co |
| 305-2415-00 | 5/9 Secondary reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
NSN 5320-01-080-6648 is a Rivet,blind, manufactured by Bisco Industries Inc Dba National Precision Products Company Div National Precision Products, classified under FSC 5320, Rivets. Status: active.
NSN 5320-01-080-6648 has 1 manufacturer part number on file: MK636BS (Bisco Industries Inc Dba National Precision Products Company Div National Precision Products).
Key specifications for MK636BS: Shank Diameter: 0.187 INCHES NOMINAL IN; Fastener Length: 0.360 INCHES NOMINAL IN; Expansion Device: PLAIN STEM-TYPE T; Surface Treatment Document and Classification: QQ-Z-325 FED SPEC SINGLE TREATMENT RESPONSE BODY. 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.