PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3678Bolt,externally Relieved Body

Jacobs Mfg Co the · NSN 5306-01-107-6371 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-01-107-6371 — this item is cataloged by the U.S. Government under National Stock Number 5306-01-107-6371. Primary manufacturer part number: 3678.
Features
  • Bolt,externally Relieved Body — FSC 5306
  • Fastener Length: 2.180 INCHES MINIMUM AND 2.200 INCHES MAXIMUM IN
  • First Diameter From Head: 0.410 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN
  • Head Height: 0.125 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN
  • Width Between Flats: 0.432 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
  • Head Style: HEXAGON
  • Thread Series Designator: UNF
  • Material: STEEL OVERALL
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-107-6371, 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 22 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5306-01-107-6371
Primary Part Number3678
Item NameBolt,externally Relieved Body
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerJacobs Mfg Co the
StatusACTIVE
Fastener Length2.180 INCHES MINIMUM AND 2.200 INCHES MAXIMUM IN
First Diameter From Head0.410 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN
Head Height0.125 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN
Width Between Flats0.432 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
Head StyleHEXAGON
Thread Series DesignatorUNF
MaterialSTEEL OVERALL
Thread Length1.540 INCHES MINIMUM AND 1.570 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Thread Class3A A
Externally Relieved Body Diameter Quantity5
Distance From Largest Bearing Surface of Head to End of First Diameter0.060 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
Third Diameter From Head0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
Distance From Largest Bearing Surface of Head to End of Third Diameter1.071 INCHES MINIMUM AND 1.101 INCHES MAXIMUM IN
Fourth Diameter From Head0.490 INCHES MINIMUM AND 0.491 INCHES MAXIMUM IN
Distance From Largest Bearing Surface of Head to End of Second Diameter0.930 INCHES MINIMUM AND 0.960 INCHES MAXIMUM IN
Thread Quantity Per Inch20
Fifth Diameter From Head0.400 INCHES MINIMUM AND 0.420 INCHES MAXIMUM IN
Nominal Thread Diameter0.500 INCHES IN
Distance From Largest Bearing Surface of Head to End of Fourth Diameter1.600 INCHES MINIMUM AND 1.630 INCHES MAXIMUM IN
Second Diameter From Head0.490 INCHES MINIMUM AND 0.491 INCHES MAXIMUM IN
Distance From Largest Bearing Surface of Head to End of Fifth Diameter1.953 INCHES MINIMUM AND 1.963 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
3110-00-100-0336 INTERCHANGEABLE
Cup,tapered Roller Bearing
5120-00-277-36628708916 INTERCHANGEABLE
Head,crowfoot Socket Wrench
U S Army Tank Automotive Command Amsta-Im-Mm
5950-00-688-98422941-21 INTERCHANGEABLE
Transformer,power
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
5310-01-097-81633678 INTERCHANGEABLE
Nut,plain,hexagon
Leslie Controls, Inc. Dba Leslie Controls Inc
5985-01-258-0735425-1 INTERCHANGEABLE
Attenuator,fixed
Cinch Connectivity Solutions Inc
2590-01-600-03143678 INTERCHANGEABLE
Vehicular Ammo Pouc
Bmi Defense Systems, Inc
5310-01-644-55503678 INTERCHANGEABLE
Nut,self-Locking,plate
80/20, Llc
4820-01-669-1210CVFP-12-N-0-060 INTERCHANGEABLE
Valve,check
J.w.f. Technologies, Llc
Cross-Reference Index
Part NumberManufacturer
3678 PRIMARY Jacobs Mfg Co the (USA)
Related Parts
3110-00-100-0336INTERCHANGEABLE
CUP,TAPERED ROLLER BEARING
5120-00-277-3662INTERCHANGEABLE
HEAD,CROWFOOT SOCKET WRENCH
8708916
5950-00-688-9842INTERCHANGEABLE
TRANSFORMER,POWER
2941-21
5310-01-097-8163INTERCHANGEABLE
NUT,PLAIN,HEXAGON
3678
5985-01-258-0735INTERCHANGEABLE
ATTENUATOR,FIXED
425-1
2590-01-600-0314INTERCHANGEABLE
VEHICULAR AMMO POUC
3678
5310-01-644-5550INTERCHANGEABLE
NUT,SELF-LOCKING,PLATE
3678
4820-01-669-1210INTERCHANGEABLE
VALVE,CHECK
CVFP-12-N-0-060

Frequently Asked Questions

What is NSN 5306-01-107-6371?

NSN 5306-01-107-6371 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 5306-01-107-6371?

NSN 5306-01-107-6371 has 1 cross-referenced part number: 3678 (Jacobs Mfg Co the).

What NSN replaces 5306-01-107-6371?

There are 8 known substitutes for 5306-01-107-6371: 3110-00-100-0336, 5120-00-277-3662, 5950-00-688-9842 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3678?

Key specifications for 3678: Fastener Length: 2.180 INCHES MINIMUM AND 2.200 INCHES MAXIMUM IN; First Diameter From Head: 0.410 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN; Special Features: HOLE DRILLED IN CENTER OF SCREW TIP 0.098-0.105 IN. DIA BY 1.093-1.110 IN. DEEP IN; Head Height: 0.125 INCHES MINIMUM AND 0.137 INCHES MAXIMUM IN. 23 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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