PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

177588Bolt,internally Relieved Body

Lockheed Martin Corp · NSN 5306-00-109-3317 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-00-109-3317 — this item is cataloged by the U.S. Government under National Stock Number 5306-00-109-3317. Primary manufacturer part number: 177588.
Features
  • Bolt,internally Relieved Body — FSC 5306
  • Head Style: HEXAGON
  • Thread Series: UNF CONCENTRIC HOLE
  • Thread Series Designator: UNF
  • Nominal Thread Diameter: 0.875 INCHES IN
  • Nominal Thread Size: 0.625 INCHES CONCENTRIC HOLE IN
  • Head Diameter: 1.312 INCHES NOMINAL IN
  • Thread Length: 1.160 INCHES MINIMUM IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-109-3317, 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 21 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5306-00-109-3317
Primary Part Number177588
Item NameBolt,internally Relieved Body
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerLockheed Martin Corp
StatusACTIVE
Head StyleHEXAGON
Thread SeriesUNF CONCENTRIC HOLE
Thread Series DesignatorUNF
Nominal Thread Diameter0.875 INCHES IN
Nominal Thread Size0.625 INCHES CONCENTRIC HOLE IN
Head Diameter1.312 INCHES NOMINAL IN
Thread Length1.160 INCHES MINIMUM IN
Style DesignatorCONCENTRIC HOLE THREADED
Thread Quantity Per Inch14
MaterialSTEEL OVERALL
Fastener Length2.000 INCHES NOMINAL IN
Internal Thread DirectionRIGHT-HAND HEAD
Width Between Flats1.380 INCHES NOMINAL IN
Extended Washer Thickness0.100 INCHES NOMINAL IN
Internal Thread Length1.000 INCHES NOMINAL CONCENTRIC HOLE IN
Material Document and ClassificationMIL-S-6050 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Threads Per Inch18 CONCENTRIC HOLE
Head Height0.512 INCHES NOMINAL IN
Thread Class3A A
Thread DirectionRIGHT-HAND
Internal Thread Class3B HEAD
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
5325-00-205-6552 INTERCHANGEABLE
Ring,retaining
Cross-Reference Index
Part NumberManufacturer
177588 PRIMARY Lockheed Martin Corp (USA)
Related Parts
5325-00-205-6552INTERCHANGEABLE
RING,RETAINING

Frequently Asked Questions

What is NSN 5306-00-109-3317?

NSN 5306-00-109-3317 is a Bolt,internally Relieved Body, manufactured by Lockheed Martin Corp, classified under FSC 5306 (No Item Name Available). Status: active.

What are the part numbers for NSN 5306-00-109-3317?

NSN 5306-00-109-3317 has 1 cross-referenced part number: 177588 (Lockheed Martin Corp).

What NSN replaces 5306-00-109-3317?

There is 1 known substitute for 5306-00-109-3317: 5325-00-205-6552. Verify interchangeability with system specifications before substitution.

What are the specifications of 177588?

Key specifications for 177588: Head Style: HEXAGON; Thread Series: UNF CONCENTRIC HOLE; Thread Series Designator: UNF; Nominal Thread Diameter: 0.875 INCHES IN. 22 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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