PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3257Cylinder Assembly,hydraulic Brak

Bendix Corp the · NSN 2530-00-678-5122 · FSC 2530 · No Item Name Available
Verified by PartsTable
NSN 2530-00-678-5122 — this item is cataloged by the U.S. Government under National Stock Number 2530-00-678-5122. Primary manufacturer part number: 3257.
Features
  • Cylinder Assembly,hydraulic Brak — FSC 2530
  • First End Fork Span Width: 0.281 INCHES NOMINAL ALL WORKING ENDS IN
  • Material: STEEL BODY
  • First Piston Rod End Style: SLOT TYPE ALL WORKING ENDS
  • Port Style: GASKET SEAL SINGLE PORT
  • First End Fork Width: 0.500 INCHES NOMINAL ALL WORKING ENDS IN
  • First End Fork Depth: 0.344 INCHES NOMINAL ALL WORKING ENDS IN
  • Port Thread Quantity Per Inch: 24 SINGLE PORT
Applications
  • Applications requiring Steel Body construction
General Description

The Cylinder Assembly,hydraulic Brak, cataloged under National Stock Number 2530-00-678-5122, is classified within Federal Supply Class 2530 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Bendix Corp the. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 14 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2530-00-678-5122
Primary Part Number3257
Item NameCylinder Assembly,hydraulic Brak
FSC / FSG2530 / 25 — No Item Name Available
ManufacturerBendix Corp the
StatusACTIVE
First End Fork Span Width0.281 INCHES NOMINAL ALL WORKING ENDS IN
MaterialSTEEL BODY
First Piston Rod End StyleSLOT TYPE ALL WORKING ENDS
Port StyleGASKET SEAL SINGLE PORT
First End Fork Width0.500 INCHES NOMINAL ALL WORKING ENDS IN
First End Fork Depth0.344 INCHES NOMINAL ALL WORKING ENDS IN
Port Thread Quantity Per Inch24 SINGLE PORT
Port Thread Class2B SINGLE PORT
Port Thread Series DesignatorUNF SINGLE PORT
Bleeding Feature Quantity1
Center to Center Distance Between Mounting Provisions2.000 INCHES NOMINAL IN
Port Location and Quantity2 CENTER SECTION
Port Thread Diameter0.375 INCHES NOMINAL SINGLE PORT IN
Piston Rod End SimilarityIDENTICAL
Mounting Facility Thread Length0.750 INCHES NOMINAL IN
Mounting Facility Thread Quantity Per Inch18
Design CharacteristicsSINGLE ACTING SINGLE CYLINDER
Mounting Facility Thread Class2A A
Mounting Facility Thread Diameter0.312 INCHES NOMINAL IN
Body Outside Diameter2.020 INCHES NOMINAL IN
Mounting Provision Arrangement StyleTWO HOLE
Extended Length7.750 INCHES NOMINAL IN
Mounting Facility Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Mounting ProvisionTHREADED MOUNTING HOLES
Bore Diameter1.490 INCHES NOMINAL IN
Compressed Length6.000 INCHES NOMINAL IN
Bore TypeSTRAIGHT
Mounting Facility Thread DirectionRIGHT-HAND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5315-00-141-65033257-00 INTERCHANGEABLE
Pin,straight,headless
Avox Systems Inc Dba Avox Systems Inc
5310-00-176-8169 INTERCHANGEABLE
Nut,plain,hexagon
2040-00-806-7034 INTERCHANGEABLE
Rudder Stock
2040-00-806-7035 INTERCHANGEABLE
Rudder Stock
2815-00-979-481788683 INTERCHANGEABLE
Ring,piston
Kaydon Ring & Seal Inc Dba Skf Precision Technologies
6695-01-202-0580 INTERCHANGEABLE
Bezel,instrument Mounting
5950-01-244-8367717801524-001 INTERCHANGEABLE
Reactor
Lockheed Martin Corporation
5310-01-435-831298025A133 INTERCHANGEABLE
Washer,flat
Mcmaster-Carr Supply Co
5325-01-602-84863257 INTERCHANGEABLE
Ring,retaining
DP Manufacturing Inc.
9905-01-616-3614 INTERCHANGEABLE
Plate,identification
Cross-Reference Index
Part NumberManufacturer
3257 Bendix Corp the (USA)
172-377 General Motors Corp Delco Electronics Div (USA)
FD28851 Federal Mogul Corp Sub Wagner Brake Moog Automotive Div (USA)
B8T2262A Ford Motor Co Ford Parts and Service Div Government Part Sales (USA)
FD18692 Federal Mogul Corp Sub Wagner Brake Moog Automotive Div (USA)
5461560 General Motors Llc Dba General Motors Llc (USA)
2084407 Chrysler Realty Company Llc Dba Daimler Chrysler (USA)
EW16892 Eis Brake Parts Div of Standard Motor Products Inc (USA)
172-377 Delco Moraine Div of General Motors Corp (USA)
28851 Echlin Inc (USA)
5461560 Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 (USA)
3257 Allied Automotive Allied Aftermarket Div (USA)
W28851 Airtex Products Div of Uis Inc (USA)
WC28851 Trw Inc Replacement Parts Div (USA)
WC28851 C E Niehoff & Co (USA)
Related Parts
5315-00-141-6503INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
3257-00
5310-00-176-8169INTERCHANGEABLE
NUT,PLAIN,HEXAGON
2040-00-806-7034INTERCHANGEABLE
RUDDER STOCK
2040-00-806-7035INTERCHANGEABLE
RUDDER STOCK
2815-00-979-4817INTERCHANGEABLE
RING,PISTON
88683
6695-01-202-0580INTERCHANGEABLE
BEZEL,INSTRUMENT MOUNTING
5950-01-244-8367INTERCHANGEABLE
REACTOR
717801524-001
5310-01-435-8312INTERCHANGEABLE
WASHER,FLAT
98025A133
5325-01-602-8486INTERCHANGEABLE
RING,RETAINING
3257
9905-01-616-3614INTERCHANGEABLE
PLATE,IDENTIFICATION

Frequently Asked Questions

What is NSN 2530-00-678-5122?

NSN 2530-00-678-5122 is a Cylinder Assembly,hydraulic Brak, manufactured by Bendix Corp the, classified under FSC 2530 (No Item Name Available). Status: active.

What are the part numbers for NSN 2530-00-678-5122?

NSN 2530-00-678-5122 has 15 cross-referenced part numbers: 3257 (Bendix Corp the), 172-377 (General Motors Corp Delco Electronics Div), FD28851 (Federal Mogul Corp Sub Wagner Brake Moog Automotive Div), B8T2262A (Ford Motor Co Ford Parts and Service Div Government Part Sales), FD18692 (Federal Mogul Corp Sub Wagner Brake Moog Automotive Div) and 10 more.

What NSN replaces 2530-00-678-5122?

There are 10 known substitutes for 2530-00-678-5122: 5315-00-141-6503, 5310-00-176-8169, 2040-00-806-7034 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3257?

Key specifications for 3257: First End Fork Span Width: 0.281 INCHES NOMINAL ALL WORKING ENDS IN; Material: STEEL BODY; First Piston Rod End Style: SLOT TYPE ALL WORKING ENDS; Port Style: GASKET SEAL SINGLE PORT. 30 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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