The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-135-3173, is classified within Federal Supply Class 6680 (Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Clark-Reliance Llc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-01-135-3173 |
| Primary Part Number | TMS-6135 |
| Item Name | Indicator,sight,liquid |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Clark-Reliance Llc |
| Status | ACTIVE |
| Furnished Data | LIQUID FLOW |
| Nominal Pipe Size for Which Designed | UNABLE TO DECODE |
| Data Furnishing Method | CLEAR WINDOW AND DRIP TUBE |
| End Connection Type | UNABLE TO DECODE |
| Style Designator | DOUBLE PORT FLANGED |
| Bolt Hole Diameter | UNABLE TO DECODE |
| Material Document and Classification | ASTM-A-216WCB ASSN STD ALL MATERIAL RESPONSES |
| Bolt Hole Quantity | UNABLE TO DECODE |
| Bolt Circle Diameter | 4.750 INCHES NOMINAL IN |
| Media for Which Designed | ANY ACCEPTABLE |
| Maximum Working Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) LBS |
| Material | STEEL |
| Flange Outside Diameter | 6.000 INCHES NOMINAL IN |
| Sight Diameter | 2.000 INCHES NOMINAL IN |
| 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 |
|---|---|
| TMS-6135 PRIMARY | Clark-Reliance Llc (USA) |
| TMS-6135 | Wbb, Inc. (USA) |
| TMS-6135 | Dsp Enterprises, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 608-F | 5/1 Secondary reference U.S. Government activity |
| 2512 | 5/9 Secondary reference U.S. Government activity |
| 608-F 2IN | 5/9 Secondary reference U.S. Government activity |
NSN 6680-01-135-3173 is a Indicator,sight,liquid, manufactured by Clark-Reliance Llc, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-135-3173 has 3 manufacturer part numbers on file: TMS-6135 (Clark-Reliance Llc), TMS-6135 (Wbb, Inc.), TMS-6135 (Dsp Enterprises, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 6680-01-183-5473, 6680-01-188-0256. Verify interchangeability with system specifications before substitution.
Key specifications for TMS-6135: Overall Height: 7.875 INCHES NOMINAL IN; Furnished Data: LIQUID FLOW; Nominal Pipe Size for Which Designed: UNABLE TO DECODE; Data Furnishing Method: CLEAR WINDOW AND DRIP TUBE. 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.