The Plate,retaining,bearing, cataloged under National Stock Number 3110-01-307-8677, is classified within Federal Supply Class 3110 (Bearings, Antifriction, Unmounted) of the Bearings group. The manufacturer of record is Harnischfeger Corp Portal Crane Parts Div. Government technical data includes 18 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3110-01-307-8677 |
| Primary Part Number | B-2720 |
| Item Name | Plate,retaining,bearing |
| FSC / FSG | 3110 / 31 — Bearings, Antifriction, Unmounted |
| Manufacturer | Harnischfeger Corp Portal Crane Parts Div |
| Status | ACTIVE |
| Minor Thickness | 0.507 INCHES NOMINAL IN |
| Raised Surface Height | 1.368 INCHES MINIMUM AND 1.373 INCHES MAXIMUM IN |
| Second Bolt Circle Hole Quantity | 4 |
| Mounting Hole Type | ROUND, UNTHREADED, COUNTERSUNK |
| Counterbore Diameter | 2.374 INCHES MINIMUM AND 2.375 INCHES MAXIMUM IN |
| Counterbore Depth | 0.688 INCHES MINIMUM IN |
| Overall Thickness | 1.875 INCHES NOMINAL IN |
| Style Designator | ROUND |
| Mounting Hole Diameter | 0.531 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RAISED SURFACE W/ APERTURE |
| Outside Diameter | 8.496 INCHES MINIMUM AND 8.498 INCHES MAXIMUM IN |
| Aperture Diameter | 2.000 INCHES NOMINAL IN |
| Inside Raised Surface Diameter | 3.5433 INCHES MINIMUM AND 3.5443 INCHES MAXIMUM IN |
| Second Bolt Circle Diameter | 7.250 INCHES NOMINAL IN |
| Countersink Angle | 82.0 DEGREES NOMINAL |
| Outside Raised Surface Diameter | 3.9960 INCHES MINIMUM AND 3.9980 INCHES MAXIMUM IN |
| First Bolt Circle Diameter | 5.000 INCHES NOMINAL IN |
| First Bolt Circle Hole Quantity | 4 |
| 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 |
|---|---|
| B-2720 PRIMARY | Harnischfeger Corp Portal Crane Parts Div (USA) |
NSN 3110-01-307-8677 is a Plate,retaining,bearing, manufactured by Harnischfeger Corp Portal Crane Parts Div, classified under FSC 3110, Bearings, Antifriction, Unmounted. Status: active.
NSN 3110-01-307-8677 has 1 manufacturer part number on file: B-2720 (Harnischfeger Corp Portal Crane Parts Div).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-646-2376. Verify interchangeability with system specifications before substitution.
Key specifications for B-2720: Minor Thickness: 0.507 INCHES NOMINAL IN; Raised Surface Height: 1.368 INCHES MINIMUM AND 1.373 INCHES MAXIMUM IN; Second Bolt Circle Hole Quantity: 4; Mounting Hole Type: ROUND, UNTHREADED, COUNTERSUNK. 18 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.