The Knob, cataloged under National Stock Number 5355-01-439-5880, is classified within Federal Supply Class 5355 (Knobs and Pointers) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Dba Lockheed Martin. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5355-01-439-5880 |
| Primary Part Number | 307253-1 |
| Item Name | Knob |
| FSC / FSG | 5355 / 53 — Knobs and Pointers |
| Manufacturer | Lockheed Martin Corporation Dba Lockheed Martin |
| Status | ACTIVE |
| Distance From Hole Center to Knob/skirt Base | 0.590 INCHES NOMINAL IN |
| Shaft Accommodation Style | COUNTERBORED |
| Overall Thickness | 1.180 INCHES NOMINAL IN |
| Style Designator | ROUND |
| Outside Diameter | 1.250 INCHES NOMINAL IN |
| Counterbore Depth | 0.219 INCHES NOMINAL IN |
| Setscrew Hole Quantity | 2 |
| Nominal Thread Size | 0.112 INCHES SCREW HOLE IN |
| Counterbore Diameter | 0.750 INCHES NOMINAL IN |
| Inside Diameter | 0.261 INCHES NOMINAL IN |
| Gripping Surface Condition | SMOOTH |
| Thread Quantity Per Inch | 40 SCREW HOLE |
| 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 |
|---|---|
| 307253-1 PRIMARY | Lockheed Martin Corporation Dba Lockheed Martin (USA) |
| 307253-1 | K-Form, Incorporated Dba K-Form Inc (USA) |
| 504353 FIND 11 | Lockheed Martin Corporation Dba Lockheed Martin (USA) |
NSN 5355-01-439-5880 is a Knob, manufactured by Lockheed Martin Corporation Dba Lockheed Martin, classified under FSC 5355, Knobs and Pointers. Status: active.
NSN 5355-01-439-5880 has 3 manufacturer part numbers on file: 307253-1 (Lockheed Martin Corporation Dba Lockheed Martin), 307253-1 (K-Form, Incorporated Dba K-Form Inc), 504353 FIND 11 (Lockheed Martin Corporation Dba Lockheed Martin).
Key specifications for 307253-1: Distance From Hole Center to Knob/skirt Base: 0.590 INCHES NOMINAL IN; Shaft Accommodation Style: COUNTERBORED; Overall Thickness: 1.180 INCHES NOMINAL IN; Style Designator: ROUND. 14 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.