The Clamp,loop, cataloged under National Stock Number 5340-01-406-8985, 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 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-406-8985 |
| Primary Part Number | S500-31 |
| 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 | AMS 5510 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5512 ASSN STD 2ND MATERIAL RESPONSE BAND |
| Diameter | 0.204 INCHES NOMINAL IN |
| Material Thickness | 0.059 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN |
| Distance From Loop Center to Tongue End | 1.687 INCHES NOMINAL IN |
| Environmental Attribute Code | ASBESTOS ALTERNATIVE PRODUCTS |
| Tongue Hole Type | ROUND, UNTHREADED |
| Center to Center Distance Between Loop and Mounting Hole | 1.439 INCHES MINIMUM AND 1.499 INCHES MAXIMUM IN |
| Material | STEEL COMP 321 OR STEEL COMP 347 BAND |
| Loop Inside Diameter | 1.938 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 |
|---|---|
| S500-31 PRIMARY | Umpco, Inc. Dba Umpco Inc (USA) |
| Reference | Meaning |
|---|---|
| 490-31RPB | 5/2 Secondary reference U.S. Government activity |
| TA09C18H31AC NON-ASBESTOS | 3/2 Design control — primary reference U.S. Government activity |
| BACC10HS31 NON-ASBESTOS | 5/2 Secondary reference U.S. Government activity |
NSN 5340-01-406-8985 is a Clamp,loop, manufactured by Umpco, Inc. Dba Umpco Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-406-8985 has 1 manufacturer part number on file: S500-31 (Umpco, Inc. Dba Umpco Inc).
Key specifications for S500-31: Style Designator: OFFSET MOUNT; Material Document and Classification: AMS 5510 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5512 ASSN STD 2ND MATERIAL RESPONSE BAND; Diameter: 0.204 INCHES NOMINAL IN; Overall Width: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN. 10 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.