The Sampling Adaptor, cataloged under National Stock Number 4240-01-504-0993, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Tsi Incorporated. Government technical data includes 2 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. 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 | 4240-01-504-0993 |
| Primary Part Number | 800577 |
| Item Name | Sampling Adaptor |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Tsi Incorporated |
| Status | ACTIVE |
| Overall Diameter | 0.685 INCHES NOMINAL IN |
| Material | ALUMINUM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
NSN 4240-01-504-0993 is a Sampling Adaptor, manufactured by Tsi Incorporated, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-504-0993 has 3 manufacturer part numbers on file: 800577 (Tsi Incorporated), 800577 (Bristol Industrial and Research Associates Limited), 312016 (Procare B.v.).
2 possible matches (shared part number, not a government interchangeability claim): 2090-01-536-9538, 5985-01-618-8746. Verify interchangeability with system specifications before substitution.
Key specifications for 800577: Overall Diameter: 0.685 INCHES NOMINAL IN; Overall Length: 2.000 INCHES NOMINAL IN; Special Features: SAMPLING ADAPTOR,S10/FM12/JSGPM,FOR USE WITH RESPIRATOR TEST SYSYTEM; Material: ALUMINUM. 2 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.