PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B687R-31BNipple,pipe

American Society for Testing and Materials Dba Astm International · NSN 4730-00-196-1975 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-196-1975 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-196-1975. Primary manufacturer part number: B687R-31B.
Features
  • Nipple,pipe — FSC 4730
  • Specification/standard Data: 81346-ASTM B687 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51846 GOVERNMENT STANDARD
  • Nominal Overall Length: 3.500 INCHES IN
  • Nominal Thread Size: 0.250 INCHES ALL ENDS IN
  • Connection Style: PLAIN (PIPE) ALL ENDS
  • Connection Type: THREADED EXTERNAL PIPE ALL ENDS
  • Material Document and Classification: ASTM B43 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Thread Series Designator: NPT ALL ENDS
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Copper Alloy Overall construction
General Description

The Nipple,pipe, cataloged under National Stock Number 4730-00-196-1975, 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 American Society for Testing and Materials Dba Astm International. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-00-196-1975
Primary Part NumberB687R-31B
Item NameNipple,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerAmerican Society for Testing and Materials Dba Astm International
StatusACTIVE
Specification/standard Data81346-ASTM B687 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51846 GOVERNMENT STANDARD
Nominal Overall Length3.500 INCHES IN
Nominal Thread Size0.250 INCHES ALL ENDS IN
Connection StylePLAIN (PIPE) ALL ENDS
Connection TypeTHREADED EXTERNAL PIPE ALL ENDS
Material Document and ClassificationASTM B43 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Thread Series DesignatorNPT ALL ENDS
Nominal Thread Size0.250 INCHES ALL ENDS IN
Thread Series DesignatorNPT ALL ENDS
Specification/standard Data81346-ASTM B687 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51846 GOVERNMENT STANDARD
Nominal Overall Length3.500 INCHES IN
Style DesignatorLONG
MaterialCOPPER ALLOY OVERALL
MaterialCOPPER ALLOY OVERALL
Operating Pressure200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Operating Pressure200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Style DesignatorLONG
Material Document and ClassificationASTM B43 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5840-00-320-2786144600 INTERCHANGEABLE
Handle,tuner
Northrop Grumman Systems Corporation
4820-00-968-55453743 INTERCHANGEABLE
Disk,valve
Husco International Inc
5945-01-450-4840144600 INTERCHANGEABLE
Relay,solid State
Setra Systems, Inc. Dba Gems Sensors
Cross-Reference Index
Part NumberManufacturer
144600 General Motors Corp AC-Delco Div Government Order Dept (USA)
215PNL-4-35 Imperial (USA)
ASTM-B687 American Society for Testing and Materials Dba Astm International (USA)
B687R-31B PRIMARY American Society for Testing and Materials Dba Astm International (USA)
WWN351 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
MS51846-31 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5840-00-320-2786INTERCHANGEABLE
HANDLE,TUNER
144600
4820-00-968-5545INTERCHANGEABLE
DISK,VALVE
3743
5945-01-450-4840INTERCHANGEABLE
RELAY,SOLID STATE
144600

Frequently Asked Questions

What is NSN 4730-00-196-1975?

NSN 4730-00-196-1975 is a Nipple,pipe, manufactured by American Society for Testing and Materials Dba Astm International, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-00-196-1975?

NSN 4730-00-196-1975 has 6 cross-referenced part numbers: 144600 (General Motors Corp AC-Delco Div Government Order Dept), 215PNL-4-35 (Imperial), ASTM-B687 (American Society for Testing and Materials Dba Astm International), B687R-31B (American Society for Testing and Materials Dba Astm International), WWN351 (Federal Specifications Promulgated by General Services Administration Washington DC) and 1 more.

What NSN replaces 4730-00-196-1975?

There are 3 known substitutes for 4730-00-196-1975: 5840-00-320-2786, 4820-00-968-5545, 5945-01-450-4840. Verify interchangeability with system specifications before substitution.

What are the specifications of B687R-31B?

Key specifications for B687R-31B: Specification/standard Data: 81346-ASTM B687 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD AND 96906-MS51846 GOVERNMENT STANDARD; Nominal Overall Length: 3.500 INCHES IN; Nominal Thread Size: 0.250 INCHES ALL ENDS IN; Connection Style: PLAIN (PIPE) ALL ENDS. 18 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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