The Coupling,shaft,flexible, cataloged under National Stock Number 3010-01-426-6948, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Rexnord Industries, Llc Div Couplings Division. Government technical data includes 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3010-01-426-6948 |
| Primary Part Number | ES20-SHSB-1.25/1.62 |
| Item Name | Coupling,shaft,flexible |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | Rexnord Industries, Llc Div Couplings Division |
| Status | ACTIVE |
| Bore Length | 2.0600 INCHES NOMINAL BOTH ENDS IN |
| Design Type | BONDED RUBBER |
| Keying Facility Type | KEYWAY BOTH ENDS |
| Outside Diameter | 7.250 INCHES NOMINAL IN |
| Features Provided | KEYWAY AND EXPOSED COUPLING BOLT TYPE |
| Bore Shape | STRAIGHT BOTH ENDS |
| Keying Facility Quantity | 1 BOTH ENDS |
| Bore Diameter | 1.2500 INCHES NOMINAL SECOND END IN |
| Bore Diameter | 1.6200 INCHES NOMINAL FIRST END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| ES20-SHSB-1.25/1.62 PRIMARY | Rexnord Industries, Llc Div Couplings Division (USA) |
| 999-5113-B-01 REV 2 ITEM 42 | Carver Pump Company (USA) |
| 042-35-0020-03 | Carver Pump Company (USA) |
| Reference | Meaning |
|---|---|
| 999-5113-B-01 | D/9 Drawing number reference only Carver Pump Company |
| ES20-1.25B/1.62B | 5/9 Secondary reference Rexnord Industries, Inc. Div Elastomer Products |
| ES20-1.25/1.625 | C/1 Advisory reference — outside the item-of-supply concept Rexnord Industries, Inc. Div Elastomer Products |
NSN 3010-01-426-6948 is a Coupling,shaft,flexible, manufactured by Rexnord Industries, Llc Div Couplings Division, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-01-426-6948 has 3 manufacturer part numbers on file: ES20-SHSB-1.25/1.62 (Rexnord Industries, Llc Div Couplings Division), 999-5113-B-01 REV 2 ITEM 42 (Carver Pump Company), 042-35-0020-03 (Carver Pump Company).
2 possible matches (shared part number, not a government interchangeability claim): 4320-01-428-4297, 4320-01-428-6360. Verify interchangeability with system specifications before substitution.
Key specifications for ES20-SHSB-1.25/1.62: Bore Length: 2.0600 INCHES NOMINAL BOTH ENDS IN; Design Type: BONDED RUBBER; Keying Facility Type: KEYWAY BOTH ENDS; Overall Length: 11.380 INCHES NOMINAL IN. 9 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.
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.