The Standoff,threaded,spacing, cataloged under National Stock Number 5340-00-491-9891, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 8 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-491-9891 |
| Primary Part Number | 58-413-6 |
| Item Name | Standoff,threaded,spacing |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Width Across Flats | 0.372 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN |
| Length | 2.486 INCHES MINIMUM AND 2.490 INCHES MAXIMUM IN |
| Groove Diameter | 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Style Designator | LEFT INTERNAL AND RIGHT EXTERNAL THREAD |
| Cross-Sectional Shape | HEXAGON |
| Shoulder Diameter | 0.360 INCHES MINIMUM AND 0.380 INCHES MAXIMUM IN |
| Shoulder Length | 0.010 INCHES NOMINAL IN |
| Groove Width | 0.060 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 |
|---|---|
| 58-413-6 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| 1771167-6 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 58-413-6 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 1771167-6 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5340-00-491-9891 is a Standoff,threaded,spacing, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-491-9891 has 2 manufacturer part numbers on file: 58-413-6 (Lockheed Martin Corporation Div Rms - Mitchel Field), 1771167-6 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 5999-01-488-7607. Verify interchangeability with system specifications before substitution.
Key specifications for 58-413-6: Width Across Flats: 0.372 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN; Length: 2.486 INCHES MINIMUM AND 2.490 INCHES MAXIMUM IN; Groove Diameter: 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN; Style Designator: LEFT INTERNAL AND RIGHT EXTERNAL THREAD. 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.