The Bumper, cataloged under National Stock Number 5340-01-342-8840, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 8 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-342-8840 |
| Primary Part Number | 9540K28 |
| Item Name | Bumper |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Outside/top Flange Diameter | 1.500 INCHES NOMINAL IN |
| Material Hardness Rating | 70.0 DUROMETER NOMINAL |
| First Counterbore Diameter | 0.750 INCHES NOMINAL IN |
| Style Designator | PAN TOP COUNTERBORED |
| First Counterbore Depth | 0.375 INCHES NOMINAL IN |
| Color | BLACK |
| Material | RUBBER BUTADIENE-STYRENE CLASS SBR |
| Hole Diameter | 0.250 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 9540K28 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5340-01-342-8840 is a Bumper, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-342-8840 has 1 manufacturer part number on file: 9540K28 (Mcmaster-Carr Supply Co).
1 possible match (shared part number, not a government interchangeability claim): 4920-01-558-5891. Verify interchangeability with system specifications before substitution.
Key specifications for 9540K28: Overall Height: 0.750 INCHES NOMINAL IN; Outside/top Flange Diameter: 1.500 INCHES NOMINAL IN; Material Hardness Rating: 70.0 DUROMETER NOMINAL; First Counterbore Diameter: 0.750 INCHES NOMINAL IN. 8 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.