PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21221Pin,shoulder,headless

Mason Electric Co. Dba Mason Controls · NSN 5315-00-758-7310 · FSC 5315 · No Item Name Available
Verified by PartsTable
NSN 5315-00-758-7310 — this item is cataloged by the U.S. Government under National Stock Number 5315-00-758-7310. Primary manufacturer part number: 21221.
Features
  • Pin,shoulder,headless — FSC 5315
  • Material Document and Classification: MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Surface Treatment: PASSIVATE OVERALL
  • Style Designator: SHOULDER
  • Material: STEEL COMP 302 OVERALL
  • Shank Length: 0.062 INCHES NOMINAL IN
  • Second Shank Length: 1.294 INCHES NOMINAL IN
  • First End Location: BOTH ENDS
Applications
  • Applications requiring Steel Comp 302 Overall construction
General Description

The Pin,shoulder,headless, cataloged under National Stock Number 5315-00-758-7310, is classified within Federal Supply Class 5315 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Mason Electric Co. Dba Mason Controls. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5315-00-758-7310
Primary Part Number21221
Item NamePin,shoulder,headless
FSC / FSG5315 / 53 — No Item Name Available
ManufacturerMason Electric Co. Dba Mason Controls
StatusCANCELLED
Material Document and ClassificationMIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Surface TreatmentPASSIVATE OVERALL
Style DesignatorSHOULDER
MaterialSTEEL COMP 302 OVERALL
Shank Length0.062 INCHES NOMINAL IN
Second Shank Length1.294 INCHES NOMINAL IN
First End LocationBOTH ENDS
Shoulder Diameter0.133 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN
Shank Diameter0.125 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN
First End Outer Radius0.062 INCHES NOMINAL IN
Second End Relationship with First EndIDENTICAL
Second Shank Diameter0.125 INCHES MINIMUM AND 0.127 INCHES MAXIMUM IN
First End StyleROUND
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 11
3120-00-367-179321221 INTERCHANGEABLE
Bearing,sleeve
Industrial Technologies and Services Llc
6685-00-453-7109 INTERCHANGEABLE
Thermocouple,immersion
3040-01-033-777621221 INTERCHANGEABLE
Shaft,drive,flexible
Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron
5342-01-144-3429531368-3 INTERCHANGEABLE
Clamp Assy,swing
Raytheon Company Dba Raytheon
4810-01-270-235321221 INTERCHANGEABLE
Actuator,electromechanical,rotar
Mark Industries
3450-01-412-643621221 INTERCHANGEABLE
Threading Machine,pipe and Bolt
Curtis-Toledo, Inc.
4820-01-416-457821221-001 INTERCHANGEABLE
Valve,linear,directional Control
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
3040-01-416-595921221-1002-1 INTERCHANGEABLE
Shaft,shouldered
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
3040-01-416-596121221-1001-1 INTERCHANGEABLE
Shaft,shouldered
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
5133-01-443-308021221 INTERCHANGEABLE
Drill,twist
Time Fastener Co Inc
Cross-Reference Index
Part NumberManufacturer
21221 Microwave Devices Inc (USA)
21221 Amphenol Corp Div Amphenol Aerospace Operations (USA)
21221 PRIMARY Mason Electric Co. Dba Mason Controls (USA)
21221 Unison Industries Llc (USA)
Related Parts
3120-00-367-1793INTERCHANGEABLE
BEARING,SLEEVE
21221
6685-00-453-7109INTERCHANGEABLE
THERMOCOUPLE,IMMERSION
3040-01-033-7776INTERCHANGEABLE
SHAFT,DRIVE,FLEXIBLE
21221
5342-01-144-3429INTERCHANGEABLE
CLAMP ASSY,SWING
531368-3
4810-01-270-2353INTERCHANGEABLE
ACTUATOR,ELECTROMECHANICAL,ROTAR
21221
3450-01-412-6436INTERCHANGEABLE
THREADING MACHINE,PIPE AND BOLT
21221
4820-01-416-4578INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
21221-001
3040-01-416-5959INTERCHANGEABLE
SHAFT,SHOULDERED
21221-1002-1
3040-01-416-5961INTERCHANGEABLE
SHAFT,SHOULDERED
21221-1001-1
5133-01-443-3080INTERCHANGEABLE
DRILL,TWIST
21221
6150-01-485-9747INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E

Frequently Asked Questions

What is NSN 5315-00-758-7310?

NSN 5315-00-758-7310 is a Pin,shoulder,headless, manufactured by Mason Electric Co. Dba Mason Controls, classified under FSC 5315 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5315-00-758-7310?

NSN 5315-00-758-7310 has 4 cross-referenced part numbers: 21221 (Microwave Devices Inc), 21221 (Amphenol Corp Div Amphenol Aerospace Operations), 21221 (Mason Electric Co. Dba Mason Controls), 21221 (Unison Industries Llc).

What NSN replaces 5315-00-758-7310?

There are 11 known substitutes for 5315-00-758-7310: 3120-00-367-1793, 6685-00-453-7109, 3040-01-033-7776 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21221?

Key specifications for 21221: Overall Length: 1.606 INCHES NOMINAL IN; Material Document and Classification: MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Surface Treatment: PASSIVATE OVERALL; Style Designator: SHOULDER. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5315-00-758-7310 still in active supply?

NSN 5315-00-758-7310 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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