PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3704Pin,shoulder,headless

Kearflex Engineering Company · NSN 5315-01-108-8591 · FSC 5315 · No Item Name Available
Verified by PartsTable
NSN 5315-01-108-8591 — this item is cataloged by the U.S. Government under National Stock Number 5315-01-108-8591. Primary manufacturer part number: 3704.
Features
  • Pin,shoulder,headless — FSC 5315
  • Shoulder Diameter: 0.0883 INCHES MINIMUM AND 0.0887 INCHES MAXIMUM IN
  • Surface Finish: 6.0 MICROINCHES UNDERCUT
  • Style Designator: SHOULDER
  • Hardness Rating: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
  • First End Location: BOTH ENDS
  • Shank Diameter: 0.0495 INCHES MINIMUM AND 0.0497 INCHES MAXIMUM IN
  • Second End Relationship with First End: IDENTICAL
Applications
  • Applications requiring Steel Comp 416 Overall construction
General Description

The Pin,shoulder,headless, cataloged under National Stock Number 5315-01-108-8591, is classified within Federal Supply Class 5315 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Kearflex Engineering Company. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5315-01-108-8591
Primary Part Number3704
Item NamePin,shoulder,headless
FSC / FSG5315 / 53 — No Item Name Available
ManufacturerKearflex Engineering Company
StatusACTIVE
Shoulder Diameter0.0883 INCHES MINIMUM AND 0.0887 INCHES MAXIMUM IN
Surface Finish6.0 MICROINCHES UNDERCUT
Style DesignatorSHOULDER
Hardness Rating32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
First End LocationBOTH ENDS
Shank Diameter0.0495 INCHES MINIMUM AND 0.0497 INCHES MAXIMUM IN
Second End Relationship with First EndIDENTICAL
MaterialSTEEL COMP 416 OVERALL
Shank Length0.047 INCHES MINIMUM AND 0.053 INCHES MAXIMUM IN
First End StyleSQUARE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4730-00-475-8593 INTERCHANGEABLE
Coupling,pipe
3020-00-528-0557 INTERCHANGEABLE
Pulley,cone
2805-00-535-667801704 INTERCHANGEABLE
Guide,valve Stem
Safeguard Powertech Systems
2915-00-613-25233704 INTERCHANGEABLE
Connector,shield
Eaton Corporation Dba Airframe Div Fuel & Motion Control Systems
5995-00-665-09497071420 INTERCHANGEABLE
Cable Assembly,special Purpose,e
U S Army Tank Automotive Command Amsta-Im-Mm
3040-00-790-26893704 INTERCHANGEABLE
Shaft,shouldered
Coffin Turbo Pump Inc
4820-01-026-651878612394-3 INTERCHANGEABLE
Valve,linear,directional Control
Kalmar AC Inc
6515-01-040-97923704 INTERCHANGEABLE
Tube,connecting,surgical Apparat
Davol Inc
5998-01-043-10033704 INTERCHANGEABLE
Circuit Card Assembly
Data Device Corp Dba Beta Transformer Technology
4730-01-118-8278 INTERCHANGEABLE
Clamp,hose
Cross-Reference Index
Part NumberManufacturer
3704 PRIMARY Kearflex Engineering Company (USA)
10122889 Nimikkeistokeskus Ncb Finland (FIN)
Related Parts
4730-00-475-8593INTERCHANGEABLE
COUPLING,PIPE
3020-00-528-0557INTERCHANGEABLE
PULLEY,CONE
2805-00-535-6678INTERCHANGEABLE
GUIDE,VALVE STEM
01704
2915-00-613-2523INTERCHANGEABLE
CONNECTOR,SHIELD
3704
5995-00-665-0949INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
7071420
3040-00-790-2689INTERCHANGEABLE
SHAFT,SHOULDERED
3704
4820-01-026-6518INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
78612394-3
6515-01-040-9792INTERCHANGEABLE
TUBE,CONNECTING,SURGICAL APPARAT
3704
5998-01-043-1003INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
3704
4730-01-118-8278INTERCHANGEABLE
CLAMP,HOSE
4130-01-159-5235INTERCHANGEABLE
COMPRESSOR,REFRIGERATION
4730-01-608-4178INTERCHANGEABLE
CLAMP,HOSE
3704

Frequently Asked Questions

What is NSN 5315-01-108-8591?

NSN 5315-01-108-8591 is a Pin,shoulder,headless, manufactured by Kearflex Engineering Company, classified under FSC 5315 (No Item Name Available). Status: active.

What are the part numbers for NSN 5315-01-108-8591?

NSN 5315-01-108-8591 has 2 cross-referenced part numbers: 3704 (Kearflex Engineering Company), 10122889 (Nimikkeistokeskus Ncb Finland).

What NSN replaces 5315-01-108-8591?

There are 12 known substitutes for 5315-01-108-8591: 4730-00-475-8593, 3020-00-528-0557, 2805-00-535-6678 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3704?

Key specifications for 3704: Shoulder Diameter: 0.0883 INCHES MINIMUM AND 0.0887 INCHES MAXIMUM IN; Overall Length: 0.450 INCHES NOMINAL IN; Surface Finish: 6.0 MICROINCHES UNDERCUT; Style Designator: SHOULDER. 11 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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