PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

27956Bolt,fluid Passage

Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. · NSN 4730-00-145-4701 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-145-4701 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-145-4701. Primary manufacturer part number: 27956.
Features
  • Bolt,fluid Passage — FSC 4730
  • First End Thread Class: 3A A
  • Wrenching Feature Height: 0.238 INCHES NOMINAL IN
  • First Diameter From Wrenching Feature: 0.315 INCHES NOMINAL IN
  • First End Thread Direction: RIGHT-HAND
  • First End Thread Series Designator: UNF
  • Length From Bearing Surface of Wrenching Feature to Bolt End: 0.723 INCHES NOMINAL IN
  • Second End Thread Direction: RIGHT-HAND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Titanium Alloy Uns R56400 construction
General Description

The Bolt,fluid Passage, cataloged under National Stock Number 4730-00-145-4701, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.. Government technical data includes 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-145-4701
Primary Part Number27956
Item NameBolt,fluid Passage
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerPratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
StatusACTIVE
First End Thread Class3A A
Wrenching Feature Height0.238 INCHES NOMINAL IN
First Diameter From Wrenching Feature0.315 INCHES NOMINAL IN
First End Thread DirectionRIGHT-HAND
First End Thread Series DesignatorUNF
Length From Bearing Surface of Wrenching Feature to Bolt End0.723 INCHES NOMINAL IN
Second End Thread DirectionRIGHT-HAND
MaterialTITANIUM ALLOY UNS R56400
Cotter Pin Hole Diameter0.062 INCHES NOMINAL IN
First End Thread Length0.625 INCHES NOMINAL IN
Second End Thread Class3A A
First End Style DesignatorINVERTED FLARE
Wrenching Feature StyleEXTENDED WASHER
Second End Nominal Thread Size0.250 INCHES IN
Second End Thread Series DesignatorUNF
First End Seat Angle15.0 DEGREES NOMINAL
Distance From First Radial Hole Center to End of Bolt0.585 INCHES NOMINAL IN
First End Nominal Thread Size0.312 INCHES IN
Second End Style DesignatorPLAIN
Hardness Rating26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
Length From Bearing Surface of Wrenching Feature to End of First Diameter0.180 INCHES NOMINAL IN
Body StyleBODY WRENCHING
Second End Thread Length0.308 INCHES NOMINAL IN
First Radial Fluid Hole Diameter0.062 INCHES NOMINAL IN
Width Across Flats0.500 INCHES NOMINAL IN
Distance From Bolt End to Hole Center0.562 INCHES NOMINAL IN
Material Document and Classification81343-AMS6322 ASSN STD 1ST MATERIAL RESPONSE OR AMS 4928 ASSN STD 2ND MATERIAL RESPONSE
Extended Washer Diameter0.625 INCHES NOMINAL IN
Concentric Hole Diameter0.078 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
3020-00-559-975435367 INTERCHANGEABLE
Gear Cluster
New Venture Gear Inc New Process Gear Div
5950-01-205-4892G111227-1 INTERCHANGEABLE
Transformer,power
Raytheon Company Dba Raytheon Co
Cross-Reference Index
Part NumberManufacturer
27956 PRIMARY Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN)
Related Parts
3020-00-559-9754INTERCHANGEABLE
GEAR CLUSTER
35367
5950-01-205-4892INTERCHANGEABLE
TRANSFORMER,POWER
G111227-1

Frequently Asked Questions

What is NSN 4730-00-145-4701?

NSN 4730-00-145-4701 is a Bolt,fluid Passage, manufactured by Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp., classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-145-4701?

NSN 4730-00-145-4701 has 1 cross-referenced part number: 27956 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.).

What NSN replaces 4730-00-145-4701?

There are 2 known substitutes for 4730-00-145-4701: 3020-00-559-9754, 5950-01-205-4892. Verify interchangeability with system specifications before substitution.

What are the specifications of 27956?

Key specifications for 27956: First End Thread Class: 3A A; Wrenching Feature Height: 0.238 INCHES NOMINAL IN; Overall Length: 1.266 INCHES NOMINAL IN; First Diameter From Wrenching Feature: 0.315 INCHES NOMINAL IN. 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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