The Spark Gap, cataloged under National Stock Number 6625-01-034-9921, is classified within Federal Supply Class 6625 (Electrical and Electronic Properties Measuring and Testing Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Unison Industries Llc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6625-01-034-9921 |
| Primary Part Number | 10-516521 |
| Item Name | Spark Gap |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Manufacturer | Unison Industries Llc |
| Status | ACTIVE |
| Current Type | DC |
| Overall Diameter | 1.162 INCHES NOMINAL IN |
| Gap Type | ROTARY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Shelf Life Code | 0 |
| Criticality Code | X |
| Unit of Issue | EA |
| Acquisition advice code | JN |
| Weight | 0.0220 lbs |
| Cube | 0.0012 cu ft |
| Part Number | Manufacturer |
|---|---|
| 10-516521 PRIMARY | Unison Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| 10-516521 | 5/9 Secondary reference Amphenol Corp Div Amphenol Aerospace Operations |
NSN 6625-01-034-9921 is a Spark Gap, manufactured by Unison Industries Llc, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
NSN 6625-01-034-9921 has 1 manufacturer part number on file: 10-516521 (Unison Industries Llc).
Key specifications for 10-516521: Current Type: DC; Overall Diameter: 1.162 INCHES NOMINAL IN; Gap Type: ROTARY; Overall Length: 1.838 INCHES MAXIMUM 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.