The Clamp,loop, cataloged under National Stock Number 5340-01-400-1819, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Umpco, Inc. Dba Umpco Inc. Government technical data includes 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-400-1819 |
| Primary Part Number | S500-3 |
| Item Name | Clamp,loop |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Umpco, Inc. Dba Umpco Inc |
| Status | ACTIVE |
| Style Designator | OFFSET MOUNT |
| Material Document and Classification | MIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE BAND |
| Diameter | 0.204 INCHES NOMINAL IN |
| Material Thickness | 0.032 INCHES NOMINAL IN |
| Distance From Loop Center to Tongue End | 0.714 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE BAND |
| Environmental Attribute Code | ASBESTOS ALTERNATIVE PRODUCTS |
| Tongue Hole Type | ROUND, UNTHREADED |
| Center to Center Distance Between Loop and Mounting Hole | 0.496 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING BAND |
| Loop Inside Diameter | 0.188 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| S500-3 | Umpco, Inc. Dba Umpco Inc (USA) |
| Reference | Meaning |
|---|---|
| 490-3RPB | 3/2 Design control — primary reference U.S. Government activity |
| TA716H3A NON-ASBESTOS | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| TA716HO03KP | 5/2 Secondary reference U.S. Government activity |
NSN 5340-01-400-1819 is a Clamp,loop, manufactured by Umpco, Inc. Dba Umpco Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-400-1819 has 1 manufacturer part number on file: S500-3 (Umpco, Inc. Dba Umpco Inc).
3 possible matches (shared part number, not a government interchangeability claim): 3120-01-483-2746, 6910-01-600-6730, 3120-01-623-8445. Verify interchangeability with system specifications before substitution.
Key specifications for S500-3: Style Designator: OFFSET MOUNT; Material Document and Classification: MIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE BAND; Diameter: 0.204 INCHES NOMINAL IN; Overall Width: 0.500 INCHES NOMINAL IN. 11 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.