The Clamp,loop, cataloged under National Stock Number 5340-00-939-9677, 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 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-00-939-9677 |
| Primary Part Number | 506137 |
| Item Name | Clamp,loop |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Umpco, Inc. Dba Umpco Inc |
| Status | ACTIVE |
| Loop Width | 0.330 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN |
| Style Designator | MULTIPLE LOOP CENTER MOUNT |
| Material Document and Classification | AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE BAND |
| Diameter | 0.310 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN |
| Material Thickness | 0.022 INCHES MINIMUM AND 0.024 INCHES MAXIMUM IN |
| Distance From Loop Center to Tongue End | 0.770 INCHES NOMINAL IN |
| Tongue Hole Type | ROUND, UNTHREADED |
| Center to Center Distance Between Loop and Mounting Hole | 0.517 INCHES MINIMUM AND 0.537 INCHES MAXIMUM IN |
| Material | STEEL COMP 321 BAND |
| Loop Length | 0.550 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 |
|---|---|
| 506137 PRIMARY | Umpco, Inc. Dba Umpco Inc (USA) |
| 506137 | Dcp Spring Acquisition Company, Inc. Dba New England Spring Div New England Spring (USA) |
| 506137 | Tokyo Judoi Kogyo K.k. (JPN) |
| 506137 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 506137 | 5/2 Secondary reference U.S. Government activity |
| 506137 | 5/2 Secondary reference U.S. Government activity |
| 506137 | 5/9 Secondary reference Hoffmann-Werke |
| 506137 | 5/9 Secondary reference Titan Corporation Dba Dba Systems |
| 506137 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 506137 | 5/9 Secondary reference Tokyo Judogi Kogyo Co. |
NSN 5340-00-939-9677 is a Clamp,loop, manufactured by Umpco, Inc. Dba Umpco Inc, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-939-9677 has 4 manufacturer part numbers on file: 506137 (Umpco, Inc. Dba Umpco Inc), 506137 (Dcp Spring Acquisition Company, Inc. Dba New England Spring Div New England Spring), 506137 (Tokyo Judoi Kogyo K.k.), 506137 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 506137: Loop Width: 0.330 INCHES MINIMUM AND 0.350 INCHES MAXIMUM IN; Style Designator: MULTIPLE LOOP CENTER MOUNT; Material Document and Classification: AMS 5510 ASSN STD SINGLE MATERIAL RESPONSE BAND; Diameter: 0.310 INCHES MINIMUM AND 0.315 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.