The Knob, cataloged under National Stock Number 5355-01-388-6558, is classified within Federal Supply Class 5355 (Knobs and Pointers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Librascope Corporation. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5355-01-388-6558 |
| Primary Part Number | L321OOO342 |
| Item Name | Knob |
| FSC / FSG | 5355 / 53 — Knobs and Pointers |
| Manufacturer | Lockheed Martin Librascope Corporation |
| Status | ACTIVE |
| Distance From Hole Center to Knob/skirt Base | 0.310 INCHES NOMINAL IN |
| Inside Width | 0.223 INCHES NOMINAL IN |
| Shaft Accommodation Style | FLATTED ONE SIDE |
| Length | 1.380 INCHES NOMINAL IN |
| Overall Thickness | 0.780 INCHES NOMINAL IN |
| Style Designator | BAR WITH SINGLE POINTER AND FLARED SKIRT |
| Setscrew Hole Quantity | 2 |
| Nominal Thread Size | 0.164 INCHES SCREW HOLE IN |
| Inside Diameter | 0.253 INCHES NOMINAL IN |
| Gripping Surface Condition | GRIP AID |
| Screw Drive Type | HEXAGON SOCKET |
| Thread Quantity Per Inch | 32 SCREW HOLE |
| Material | PLASTIC |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SCREW HOLE |
| Attachment Method | SETSCREWS |
| 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 |
|---|---|
| L321OOO342 PRIMARY | Lockheed Martin Librascope Corporation (USA) |
| Reference | Meaning |
|---|---|
| L321000342 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5355-01-388-6558 is a Knob, manufactured by Lockheed Martin Librascope Corporation, classified under FSC 5355, Knobs and Pointers. Status: active.
NSN 5355-01-388-6558 has 1 manufacturer part number on file: L321OOO342 (Lockheed Martin Librascope Corporation).
Key specifications for L321OOO342: Distance From Hole Center to Knob/skirt Base: 0.310 INCHES NOMINAL IN; Inside Width: 0.223 INCHES NOMINAL IN; Shaft Accommodation Style: FLATTED ONE SIDE; Length: 1.380 INCHES NOMINAL IN. 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.