The Bumper, cataloged under National Stock Number 5340-01-048-9986, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is L3 Technologies, Inc. Div L3 Keo. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5340-01-048-9986 |
| Primary Part Number | 51921 |
| Item Name | Bumper |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | L3 Technologies, Inc. Div L3 Keo |
| Status | ACTIVE |
| Material Document and Classification | MIL-R-1149, TYPE 1, CLASS 1-CANCELLED MIL SPEC SINGLE MATERIAL RESPONSE |
| Color | BLACK |
| Material | RUBBER |
| 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 |
|---|---|
| 51921 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| X-3689 | Basic Rubber and Plastics Co. (USA) |
| Reference | Meaning |
|---|---|
| X-3689 | 5/9 Secondary reference Atlantic India Rubber Co Inc |
| 887B051921 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 887B051921 | 5/9 Secondary reference L3 Technologies, Inc. Div L3 Keo |
NSN 5340-01-048-9986 is a Bumper, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-048-9986 has 2 manufacturer part numbers on file: 51921 (L3 Technologies, Inc. Div L3 Keo), X-3689 (Basic Rubber and Plastics Co.).
3 possible matches (shared part number, not a government interchangeability claim): 3120-01-239-7181, 9540-01-300-2881, 4730-01-335-5998. Verify interchangeability with system specifications before substitution.
Key specifications for 51921: Overall Height: 0.195 INCHES NOMINAL IN; Material Document and Classification: MIL-R-1149, TYPE 1, CLASS 1-CANCELLED MIL SPEC SINGLE MATERIAL RESPONSE; Overall Length: 1.875 INCHES NOMINAL IN; Overall Width: 1.100 INCHES NOMINAL IN. 3 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.