PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4-0121Bolt,machine

Namjet Llc · NSN 5306-01-660-4300 · FSC 5306 · No Item Name Available
Verified by PartsTable
NSN 5306-01-660-4300 — this item is cataloged by the U.S. Government under National Stock Number 5306-01-660-4300. Primary manufacturer part number: 4-0121.
Features
  • Bolt,machine — FSC 5306
  • Material: STEEL COMP 316 OVERALL
  • Thread Quantity Per Inch: 13
  • Nominal Thread Diameter: 0.500 INCHES IN
  • Fastener Length: 2.250 INCHES NOMINAL IN
  • Head Style: HEXAGON
  • Thread Length: 2.250 INCHES NOMINAL IN
  • Thread Direction: RIGHT-HAND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 316 Overall construction
General Description

The Bolt,machine, cataloged under National Stock Number 5306-01-660-4300, is classified within Federal Supply Class 5306 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Namjet Llc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5306-01-660-4300
Primary Part Number4-0121
Item NameBolt,machine
FSC / FSG5306 / 53 — No Item Name Available
ManufacturerNamjet Llc
StatusACTIVE
MaterialSTEEL COMP 316 OVERALL
Thread Quantity Per Inch13
Nominal Thread Diameter0.500 INCHES IN
Fastener Length2.250 INCHES NOMINAL IN
Head StyleHEXAGON
Thread Length2.250 INCHES NOMINAL IN
Thread DirectionRIGHT-HAND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5110-00-156-0124 INTERCHANGEABLE
File,hand
3455-00-194-051510000 INTERCHANGEABLE
Cutter,milling,plain
Niagara Cutter Inc
4510-00-595-092340121 INTERCHANGEABLE
Bulb,flush,water Closet Tank
Danco Inc
3120-00-661-780740121 INTERCHANGEABLE
Bushing,sleeve
Northrop Grumman Systems Corporation Div Marine Systems
5305-00-807-644640121 INTERCHANGEABLE
Screw,wood
Hillman Group, Inc., the
5330-00-998-3230648195 INTERCHANGEABLE
Gasket
Parker-Hannifin Corporation Dba Pneutronics Div Composite Sealing Systems Division
4210-01-080-1457 INTERCHANGEABLE
Coupling,hose,fire Fighting
6685-01-155-3061 INTERCHANGEABLE
Transmitter,temperature,electric
5995-01-309-450840121 INTERCHANGEABLE
Cable Assembly,special Purpose,e
Bell Intl Inc
3040-01-347-283140121 INTERCHANGEABLE
Shaft,shouldered
Control Enterprises Inc Dba C.e.i.
Cross-Reference Index
Part NumberManufacturer
4-0121 Birdon Pty Ltd (AUS)
4-0121 PRIMARY Namjet Llc (USA)
Related Parts
5110-00-156-0124INTERCHANGEABLE
FILE,HAND
3455-00-194-0515INTERCHANGEABLE
CUTTER,MILLING,PLAIN
10000
4510-00-595-0923INTERCHANGEABLE
BULB,FLUSH,WATER CLOSET TANK
40121
3120-00-661-7807INTERCHANGEABLE
BUSHING,SLEEVE
40121
5305-00-807-6446INTERCHANGEABLE
SCREW,WOOD
40121
5330-00-998-3230INTERCHANGEABLE
GASKET
648195
4210-01-080-1457INTERCHANGEABLE
COUPLING,HOSE,FIRE FIGHTING
6685-01-155-3061INTERCHANGEABLE
TRANSMITTER,TEMPERATURE,ELECTRIC
5995-01-309-4508INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
40121
3040-01-347-2831INTERCHANGEABLE
SHAFT,SHOULDERED
40121
8465-01-565-4002INTERCHANGEABLE
HYDRATION SYSTEM
40121
5133-01-644-5808INTERCHANGEABLE
DRILL,TWIST
40121

Frequently Asked Questions

What is NSN 5306-01-660-4300?

NSN 5306-01-660-4300 is a Bolt,machine, manufactured by Namjet Llc, classified under FSC 5306 (No Item Name Available). Status: active.

What are the part numbers for NSN 5306-01-660-4300?

NSN 5306-01-660-4300 has 2 cross-referenced part numbers: 4-0121 (Birdon Pty Ltd), 4-0121 (Namjet Llc).

What NSN replaces 5306-01-660-4300?

There are 12 known substitutes for 5306-01-660-4300: 5110-00-156-0124, 3455-00-194-0515, 4510-00-595-0923 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4-0121?

Key specifications for 4-0121: End Item Identification: 1940-01-615-8699; Material: STEEL COMP 316 OVERALL; Part Name Assigned by Controlling Agency: HEX BOLT; Thread Quantity Per Inch: 13. 9 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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