PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

13903Buffer,discharge Valve

Hdt Expeditionary Systems Inc · NSN 4310-00-354-7073 · FSC 4310 · No Item Name Available
Verified by PartsTable
NSN 4310-00-354-7073 — this item is cataloged by the U.S. Government under National Stock Number 4310-00-354-7073. Primary manufacturer part number: 13903.
Features
  • Buffer,discharge Valve — FSC 4310
  • General Characteristics Item Description: 4.312 IN.OD;0.375 IN.ID;1.031 IN.W IN
  • 3 verified cross-references
  • Primary manufacturer: Hdt Expeditionary Systems Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Buffer,discharge Valve, cataloged under National Stock Number 4310-00-354-7073, is classified within Federal Supply Class 4310 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Hdt Expeditionary Systems Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 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
NSN4310-00-354-7073
Primary Part Number13903
Item NameBuffer,discharge Valve
FSC / FSG4310 / 43 — No Item Name Available
ManufacturerHdt Expeditionary Systems Inc
StatusACTIVE
General Characteristics Item Description4.312 IN.OD;0.375 IN.ID;1.031 IN.W IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5985-00-501-1642 INTERCHANGEABLE
Antenna Subassembly
5331-00-716-555113903 INTERCHANGEABLE
O-Ring
Tyco Fire Products Lp
5120-00-828-819513903 INTERCHANGEABLE
Wrench,spanner
Stanley Industrial & Automotive Llc
5360-00-917-8191 INTERCHANGEABLE
Spring,helical,compression
5805-01-103-0427 INTERCHANGEABLE
Extractor
5306-01-167-434613903 INTERCHANGEABLE
Bolt,machine
New Venture Gear Inc New Process Gear Div
5355-01-200-965113903 INTERCHANGEABLE
Knob
Jergens Inc Div Tooling Components Division
5950-01-212-7291C235A380-1 INTERCHANGEABLE
Reactor
Telephonics Corp
3990-01-234-6561D1390 INTERCHANGEABLE
Lifting-Tiedown Rh
Bromma, Inc.
5965-01-551-9557TS-80 INTERCHANGEABLE
Tripod,speaker
Ultimate Support Systems, Inc
Cross-Reference Index
Part NumberManufacturer
13903 Drs Environmental Systems Inc (USA)
13903 PRIMARY Hdt Expeditionary Systems Inc (USA)
13903 Davey Compressor Co Div of Keco Industries Inc (USA)
Related Parts
5985-00-501-1642INTERCHANGEABLE
ANTENNA SUBASSEMBLY
5331-00-716-5551INTERCHANGEABLE
O-RING
13903
5120-00-828-8195INTERCHANGEABLE
WRENCH,SPANNER
13903
5360-00-917-8191INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
5805-01-103-0427INTERCHANGEABLE
EXTRACTOR
5306-01-167-4346INTERCHANGEABLE
BOLT,MACHINE
13903
5355-01-200-9651INTERCHANGEABLE
KNOB
13903
5950-01-212-7291INTERCHANGEABLE
REACTOR
C235A380-1
3990-01-234-6561INTERCHANGEABLE
LIFTING-TIEDOWN RH
D1390
5965-01-551-9557INTERCHANGEABLE
TRIPOD,SPEAKER
TS-80

Frequently Asked Questions

What is NSN 4310-00-354-7073?

NSN 4310-00-354-7073 is a Buffer,discharge Valve, manufactured by Hdt Expeditionary Systems Inc, classified under FSC 4310 (No Item Name Available). Status: active.

What are the part numbers for NSN 4310-00-354-7073?

NSN 4310-00-354-7073 has 3 cross-referenced part numbers: 13903 (Drs Environmental Systems Inc), 13903 (Hdt Expeditionary Systems Inc), 13903 (Davey Compressor Co Div of Keco Industries Inc).

What NSN replaces 4310-00-354-7073?

There are 10 known substitutes for 4310-00-354-7073: 5985-00-501-1642, 5331-00-716-5551, 5120-00-828-8195 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 13903?

Key specifications for 13903: General Characteristics Item Description: 4.312 IN.OD;0.375 IN.ID;1.031 IN.W IN. 1 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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