PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

CA21388-4Bolt,internal Wrenching

Howmet Global Fastening Systems Inc. Div Tridair Products · NSN 5306-01-520-8855 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-01-520-8855 — this item is cataloged by the U.S. Government under National Stock Number 5306-01-520-8855. Primary manufacturer part number: CA21388-4.
Features
  • Bolt,internal Wrenching — FSC 5306
  • Criticality Code Justification: AGAV
  • 5 verified cross-references
  • Primary manufacturer: Howmet Global Fastening Systems Inc. Div Tridair Products
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
General Description

The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-520-8855, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Howmet Global Fastening Systems Inc. Div Tridair Products. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, 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
NSN5306-01-520-8855
Primary Part NumberCA21388-4
Item NameBolt,internal Wrenching
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerHowmet Global Fastening Systems Inc. Div Tridair Products
StatusACTIVE
Criticality Code JustificationAGAV
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5325-00-807-7968 INTERCHANGEABLE
Ring,retaining
5330-01-021-5368720-2402065PIECE 25 INTERCHANGEABLE
Seal,plain Encased
Naval Sea Systems Command
Cross-Reference Index
Part NumberManufacturer
CA21388-4 PRIMARY Howmet Global Fastening Systems Inc. Div Tridair Products (USA)
121502-4 Wesco Aircraft Hardware Corp. Dba Incora (USA)
121502-4 Monadnock Company, the Dba Lisi Aerospace (USA)
CA21388-4 Wesco Aircraft Hardware Corp. Dba Incora (USA)
50-120-4 PRIMARY Bell Textron Inc (USA)
Related Parts
5325-00-807-7968INTERCHANGEABLE
RING,RETAINING
5330-01-021-5368INTERCHANGEABLE
SEAL,PLAIN ENCASED
720-2402065PIECE 25

Frequently Asked Questions

What is NSN 5306-01-520-8855?

NSN 5306-01-520-8855 is a Bolt,internal Wrenching, manufactured by Howmet Global Fastening Systems Inc. Div Tridair Products, classified under FSC 5306 (No Item Name Available). Status: active.

What are the part numbers for NSN 5306-01-520-8855?

NSN 5306-01-520-8855 has 5 cross-referenced part numbers: CA21388-4 (Howmet Global Fastening Systems Inc. Div Tridair Products), 121502-4 (Wesco Aircraft Hardware Corp. Dba Incora), 121502-4 (Monadnock Company, the Dba Lisi Aerospace), CA21388-4 (Wesco Aircraft Hardware Corp. Dba Incora), 50-120-4 (Bell Textron Inc).

What NSN replaces 5306-01-520-8855?

There are 2 known substitutes for 5306-01-520-8855: 5325-00-807-7968, 5330-01-021-5368. Verify interchangeability with system specifications before substitution.

What are the specifications of CA21388-4?

Key specifications for CA21388-4: End Item Identification: MV-22 AIRCRAFT (V-22 LRIP 1 E-NSN ISIL); Criticality Code Justification: AGAV. 2 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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