The Cylinder Assembly,hydraulic Brak, cataloged under National Stock Number 2530-00-248-3537, is classified within Federal Supply Class 2530 (Vehicular Brake, Steering, Axle, Wheel, and Track Components) of the Vehicular Equipment Components group. The manufacturer of record is General Motors Llc Dba General Motors Llc. Government technical data includes 25 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 11 items share a part number with this NSN in the catalog (possible match — not a government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 | 2530-00-248-3537 |
| Primary Part Number | 5464134 |
| Item Name | Cylinder Assembly,hydraulic Brak |
| FSC / FSG | 2530 / 25 — Vehicular Brake, Steering, Axle, Wheel, and Track Components |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | ACTIVE |
| Mounting Facility Thread Class | 2B |
| Bleeding Feature Quantity | 1 |
| Seat Angle in Deg | 42.0 LOCATION NOT OTHERWISE SPECIFIED |
| Design Characteristics | DOUBLE ACTING SINGLE CYLINDER |
| Port Thread Series Designator | UNS LOCATION NOT OTHERWISE SPECIFIED |
| Body Outside Diameter | 2.065 INCHES NOMINAL IN |
| Mounting Position | LEFT AND RIGHT |
| Mounting Provision Arrangement Style | FOUR HOLE RECTANGULAR |
| Longest Vertical Distance Between Mounting Centers | 1.531 INCHES NOMINAL IN |
| Mounting Facility Thread Quantity Per Inch | 18 |
| Bore Type | STRAIGHT |
| Port Thread Class | 2B LOCATION NOT OTHERWISE SPECIFIED |
| Port Thread Quantity Per Inch | 24 LOCATION NOT OTHERWISE SPECIFIED |
| Mounting Facility Thread Length | 0.438 INCHES NOMINAL IN |
| Port Thread Diameter | 0.438 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Mounting Facility Thread Diameter | 0.313 INCHES NOMINAL IN |
| Port Location and Quantity | 1 CENTER SECTION |
| Port Style | INVERTED FLARE LOCATION NOT OTHERWISE SPECIFIED |
| Mounting Facility Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Bore Diameter | 1.500 INCHES NOMINAL IN |
| Material | IRON CAST BODY |
| Mounting Type and Location | FLANGE CENTER SECTION |
| Mounting Facility Thread Direction | RIGHT-HAND |
| Mounting Provision | THREADED MOUNTING HOLES |
| Longest Horizontal Distance Between Mounting Centers | 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 |
| Part Number | Manufacturer |
|---|---|
| WC-57851 | Trw Inc Replacement Parts Div (USA) |
| 5464134 PRIMARY | General Motors Llc Dba General Motors Llc (USA) |
| F57851 | Federal Mogul Corp Sub Wagner Brake Moog Automotive Div (USA) |
| Reference | Meaning |
|---|---|
| 3551 | 5/9 Secondary reference Bendix Corp the |
| 3551 | 5/9 Secondary reference Bendix Corp the Brake and Steering Div |
| 172-153 | 5/9 Secondary reference General Motors Corp Delco Electronics Div |
| H-57851 | 5/2 Secondary reference U.S. Government activity |
| 5464134 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| 172-153 | 5/9 Secondary reference Delco Moraine Div of General Motors Corp |
| 37157 | 5/9 Secondary reference Echlin Inc |
| WC-57851 | 5/9 Secondary reference C E Niehoff & Co |
| EW57851 | 5/9 Secondary reference U.S. Government activity |
| 3551 | 5/9 Secondary reference Allied Automotive Allied Aftermarket Div |
NSN 2530-00-248-3537 is a Cylinder Assembly,hydraulic Brak, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 2530, Vehicular Brake, Steering, Axle, Wheel, and Track Components. Status: active.
NSN 2530-00-248-3537 has 3 manufacturer part numbers on file: WC-57851 (Trw Inc Replacement Parts Div), 5464134 (General Motors Llc Dba General Motors Llc), F57851 (Federal Mogul Corp Sub Wagner Brake Moog Automotive Div).
11 possible matches (shared part number, not a government interchangeability claim): 5815-00-369-9417, 3110-00-554-5408, 5935-00-619-3687. Verify interchangeability with system specifications before substitution.
Key specifications for 5464134: Overall Height: 2.400 INCHES NOMINAL IN; Mounting Facility Thread Class: 2B; Bleeding Feature Quantity: 1; Seat Angle in Deg: 42.0 LOCATION NOT OTHERWISE SPECIFIED. 25 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.