PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21183Bolt,externally Relieved Body

Jacobs Mfg Co the · NSN 5306-01-319-0381 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-01-319-0381 — this item is cataloged by the U.S. Government under National Stock Number 5306-01-319-0381. Primary manufacturer part number: 21183.
Features
  • Bolt,externally Relieved Body — FSC 5306
  • Fastener Length: 109.2 MILLIMETERS MINIMUM AND 110.8 MILLIMETERS MAXIMUM MM
  • Nominal Thread Diameter: 12.0 MILLIMETERS MM
  • Material: STEEL PROPERTY CLASS 12.9 OVERALL
  • Thread Pitch in Millimeters: 1.75
  • External Thread Tolerance Class: 6G G
  • Extended Washer Diameter: 20.32 MILLIMETERS MINIMUM AND 21.59 MILLIMETERS MAXIMUM MM
  • Distance From Largest Bearing Surface of Head to End of First Diameter: 80.8 MILLIMETERS NOMINAL MM
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Property Class 12.9 Overall construction
General Description

The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-319-0381, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Jacobs Mfg Co the. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5306-01-319-0381
Primary Part Number21183
Item NameBolt,externally Relieved Body
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerJacobs Mfg Co the
StatusACTIVE
Fastener Length109.2 MILLIMETERS MINIMUM AND 110.8 MILLIMETERS MAXIMUM MM
Nominal Thread Diameter12.0 MILLIMETERS MM
MaterialSTEEL PROPERTY CLASS 12.9 OVERALL
Thread Pitch in Millimeters1.75
External Thread Tolerance Class6G G
Extended Washer Diameter20.32 MILLIMETERS MINIMUM AND 21.59 MILLIMETERS MAXIMUM MM
Distance From Largest Bearing Surface of Head to End of First Diameter80.8 MILLIMETERS NOMINAL MM
Head StyleDOUBLE HEXAGON EXTENDED WASHER
Head Height11.73 MILLIMETERS MINIMUM AND 12.00 MILLIMETERS MAXIMUM MM
Width Between Flats11.93 MILLIMETERS MINIMUM AND 12.05 MILLIMETERS MAXIMUM MM
Extended Washer Thickness5.03 MILLIMETERS MINIMUM AND 5.40 MILLIMETERS MAXIMUM MM
Thread DirectionRIGHT-HAND
Thread Length30.0 MILLIMETERS MINIMUM MM
Externally Relieved Body Diameter Quantity1
First Diameter From Head10.734 MILLIMETERS MINIMUM AND 10.829 MILLIMETERS MAXIMUM MM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5841-00-433-9386756-3569 INTERCHANGEABLE
Cap Asy
Lockheed Martin Corporation Div Space
6680-00-532-29152-1183 INTERCHANGEABLE
Indicator,rate of Flow
Jaidinger Manufacturing Co Inc Dba Jaidinger Manufacturing Co Inc
5330-00-758-5302 INTERCHANGEABLE
Seal,plain Encased
4730-00-838-680321183 INTERCHANGEABLE
Strainer Element,sediment
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
6625-01-039-547921176 INTERCHANGEABLE
Test Set,insulation Breakdown
Avo Intl
6145-01-282-825321183 INTERCHANGEABLE
Cable,radio Frequency
Champlain Cable Leeds Corporation
3110-01-288-9737 INTERCHANGEABLE
Retainer,domed
Cross-Reference Index
Part NumberManufacturer
21183 PRIMARY Jacobs Mfg Co the (USA)
00-016345 Jacobs Mfg Co the (USA)
Related Parts
5841-00-433-9386INTERCHANGEABLE
CAP ASY
756-3569
6680-00-532-2915INTERCHANGEABLE
INDICATOR,RATE OF FLOW
2-1183
5330-00-758-5302INTERCHANGEABLE
SEAL,PLAIN ENCASED
4730-00-838-6803INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
21183
6625-01-039-5479INTERCHANGEABLE
TEST SET,INSULATION BREAKDOWN
21176
6145-01-282-8253INTERCHANGEABLE
CABLE,RADIO FREQUENCY
21183
3110-01-288-9737INTERCHANGEABLE
RETAINER,DOMED

Frequently Asked Questions

What is NSN 5306-01-319-0381?

NSN 5306-01-319-0381 is a Bolt,externally Relieved Body, manufactured by Jacobs Mfg Co the, classified under FSC 5306 (No Item Name Available). Status: active.

What are the part numbers for NSN 5306-01-319-0381?

NSN 5306-01-319-0381 has 2 cross-referenced part numbers: 21183 (Jacobs Mfg Co the), 00-016345 (Jacobs Mfg Co the).

What NSN replaces 5306-01-319-0381?

There are 7 known substitutes for 5306-01-319-0381: 5841-00-433-9386, 6680-00-532-2915, 5330-00-758-5302 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21183?

Key specifications for 21183: Fastener Length: 109.2 MILLIMETERS MINIMUM AND 110.8 MILLIMETERS MAXIMUM MM; Nominal Thread Diameter: 12.0 MILLIMETERS MM; Material: STEEL PROPERTY CLASS 12.9 OVERALL; Thread Pitch in Millimeters: 1.75. 15 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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