The Indicator Subassembly,rate of Fl, cataloged under National Stock Number 6620-01-535-0409, is classified within Federal Supply Class 6620 (Engine Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6620-01-535-0409 |
| Primary Part Number | HO -(MIL-FXF1SS)-7.5 INCH-P.25-U |
| Item Name | Indicator Subassembly,rate of Fl |
| FSC / FSG | 6620 / 66 — Engine Instruments |
| Manufacturer | Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| HO -(MIL-FXF1SS)-7.5 INCH-P.25-U PRIMARY | Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| 89C0016R0010 | 5/9 Secondary reference Cox Instruments Llc Dba Exact Flow |
| 604AS893-3 | 7/2 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| 83282-12 | 5/9 Secondary reference Ametek Inc Schutte and Koerting Div |
| 89C0016R0010 | 5/9 Secondary reference Ametek Inc Schutte and Koerting Div |
NSN 6620-01-535-0409 is a Indicator Subassembly,rate of Fl, manufactured by Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc, classified under FSC 6620, Engine Instruments. Status: active.
NSN 6620-01-535-0409 has 1 manufacturer part number on file: HO -(MIL-FXF1SS)-7.5 INCH-P.25-U (Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc).
Key specifications for HO -(MIL-FXF1SS)-7.5 INCH-P.25-U: Overall Length: 7.500 INCHES NOMINAL IN; Special Features: TUBE IS 2"; INDICATOR IS UPSTREAM IN TYPE; MATERIAL IS 307 STAINLESS STEEL SEAMLESS TUBING WIT 37 DEGREE FLARED FITTINGS: PRESSURE TAP,WITH FLARED FITTINGS AND STAINLESS STEEL CAP PROVIDED; End Item Identification: JET ENGINE TEST INST; INTERCOM SYS. 0 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.
NSN 6620-01-535-0409 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.