PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

352181Bolt,internal Wrenching

Lockheed Martin Corp · NSN 5306-00-558-9993 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-558-9993 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-558-9993. Primary manufacturer part number: 352181.
Features
  • Bolt,internal Wrenching — FSC 5306
  • Internal Drive Style: HEXAGON
  • Minimum Tensile Strength: 160000 POUNDS PER SQUARE INCH LBS
  • Head Height: 1.000 INCHES NOMINAL IN
  • Thread Class: 3A A
  • Material: STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL
  • Material Document and Classification: MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL
  • Surface Treatment Document and Classification: LAC0491 FSCM 98897 MFR REF SINGLE TREATMENT RESPONSE AND 170 FSCM 98897 MFR REF SINGLE TREATMENT RESPONSE OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 4140 or Steel Comp E4340 or Steel Comp 6150 or Steel Comp 8735 or Steel Comp 8740 Overall construction
General Description

The Bolt,internal Wrenching, cataloged under National Stock Number 5306-00-558-9993, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Lockheed Martin Corp. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5306-00-558-9993
Primary Part Number352181
Item NameBolt,internal Wrenching
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerLockheed Martin Corp
StatusACTIVE
Internal Drive StyleHEXAGON
Minimum Tensile Strength160000 POUNDS PER SQUARE INCH LBS
Head Height1.000 INCHES NOMINAL IN
Thread Class3A A
MaterialSTEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL
Material Document and ClassificationMIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL
Surface Treatment Document and ClassificationLAC0491 FSCM 98897 MFR REF SINGLE TREATMENT RESPONSE AND 170 FSCM 98897 MFR REF SINGLE TREATMENT RESPONSE OVERALL
Surface TreatmentCADMIUM OVERALL
Thread Series DesignatorUNS
Nominal Thread Diameter1.000 INCHES IN
Thread Length1.287 INCHES MINIMUM AND 1.337 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Distance From Largest Bearing Surface of Head to End of First Diameter3.240 INCHES MINIMUM AND 3.260 INCHES MAXIMUM IN
Head Diameter1.615 INCHES MINIMUM AND 1.625 INCHES MAXIMUM IN
Width Across Flats0.750 INCHES MINIMUM AND 0.754 INCHES MAXIMUM IN
Fastener Length4.547 INCHES MINIMUM AND 4.577 INCHES MAXIMUM IN
Thread Quantity Per Inch14
First Diameter From Head0.993 INCHES MINIMUM AND 0.994 INCHES MAXIMUM IN
Head StyleBEVEL-CONICAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5996-00-711-7962 INTERCHANGEABLE
Amplifier,direct Current
4810-01-052-532135218-1 INTERCHANGEABLE
Poppet
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
6605-01-493-683235218-1 INTERCHANGEABLE
Housing Assembly,navigation Set
United States Department of the Navy Dba Naval Surface Warfare Center Panama City
6605-01-555-6836 INTERCHANGEABLE
Housing Assembly,navigation Set
Cross-Reference Index
Part NumberManufacturer
352181 PRIMARY Lockheed Martin Corp (USA)
Related Parts
5996-00-711-7962INTERCHANGEABLE
AMPLIFIER,DIRECT CURRENT
4810-01-052-5321INTERCHANGEABLE
POPPET
35218-1
6605-01-493-6832INTERCHANGEABLE
HOUSING ASSEMBLY,NAVIGATION SET
35218-1
6605-01-555-6836INTERCHANGEABLE
HOUSING ASSEMBLY,NAVIGATION SET

Frequently Asked Questions

What is NSN 5306-00-558-9993?

NSN 5306-00-558-9993 is a Bolt,internal Wrenching, manufactured by Lockheed Martin Corp, classified under FSC 5306 (No Item Name Available). Status: active.

What are the part numbers for NSN 5306-00-558-9993?

NSN 5306-00-558-9993 has 1 cross-referenced part number: 352181 (Lockheed Martin Corp).

What NSN replaces 5306-00-558-9993?

There are 4 known substitutes for 5306-00-558-9993: 5996-00-711-7962, 4810-01-052-5321, 6605-01-493-6832 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 352181?

Key specifications for 352181: Internal Drive Style: HEXAGON; Minimum Tensile Strength: 160000 POUNDS PER SQUARE INCH LBS; Head Height: 1.000 INCHES NOMINAL IN; Thread Class: 3A A. 19 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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