The Knob, cataloged under National Stock Number 5355-00-031-0281, is classified within Federal Supply Class 5355 (Knobs and Pointers) of the Hardware and Abrasives group. The manufacturer of record is Telephonics Corporation. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5355-00-031-0281 |
| Primary Part Number | 388750-1 |
| Item Name | Knob |
| FSC / FSG | 5355 / 53 — Knobs and Pointers |
| Manufacturer | Telephonics Corporation |
| Status | ACTIVE |
| Distance From Hole Center to Knob/skirt Base | 0.427 INCHES MAXIMUM IN |
| Shaft Accommodation Style | COUNTERBORED |
| Overall Thickness | 1.300 INCHES MINIMUM AND 1.400 INCHES MAXIMUM IN |
| Skirt Outside Diameter | 1.185 INCHES MAXIMUM IN |
| Style Designator | ROUND WITH CRANK |
| Counterbore Depth | 0.250 INCHES NOMINAL IN |
| Setscrew Hole Quantity | 2 |
| Nominal Thread Size | 0.164 INCHES SCREW HOLE IN |
| Counterbore Diameter | 0.685 INCHES NOMINAL IN |
| Inside Diameter | 0.252 INCHES MINIMUM AND 0.254 INCHES MAXIMUM IN |
| Gripping Surface Condition | GRIP AID |
| Color | BLACK |
| Skirt Design | NONDETACHABLE |
| Width | 1.682 INCHES MINIMUM AND 1.758 INCHES MAXIMUM IN |
| Screw Drive Type | HEXAGON SOCKET |
| Thread Quantity Per Inch | 32 SCREW HOLE |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SCREW HOLE |
| Skirt Style | STEPPED |
| 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 |
|---|---|
| 388750-1 PRIMARY | Telephonics Corporation (USA) |
| Reference | Meaning |
|---|---|
| 388750-1 | 5/9 Secondary reference L3harris Technologies, Inc. Dba Harris Corp Div Antenna Products |
NSN 5355-00-031-0281 is a Knob, manufactured by Telephonics Corporation, classified under FSC 5355, Knobs and Pointers. Status: active.
NSN 5355-00-031-0281 has 1 manufacturer part number on file: 388750-1 (Telephonics Corporation).
1 possible match (shared part number, not a government interchangeability claim): 3110-01-674-4451. Verify interchangeability with system specifications before substitution.
Key specifications for 388750-1: Distance From Hole Center to Knob/skirt Base: 0.427 INCHES MAXIMUM IN; Shaft Accommodation Style: COUNTERBORED; Overall Thickness: 1.300 INCHES MINIMUM AND 1.400 INCHES MAXIMUM IN; Skirt Outside Diameter: 1.185 INCHES MAXIMUM IN. 19 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.