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Socket Head Cap Screw NSN 5305-01-621-2491

Item Description

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.

NSN 5305-01-621-2491 NSN: 5305-01-621-2491

Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.97 inches and 1.00 inches
Fastener Length
Between 0.97 inches and 1.00 inches
Head Style
Flat fillister
Head Diameter
Between 0.365 inches and 0.375 inches
Head Height
Between 0.244 inches and 0.250 inches
Internal Drive Style
Hexagon
Thread Diameter
0.250 inches
Width Across Flats
Between 0.1875 inches and 0.1900 inches
Thready Qty Per Inch (tpi)
28
Part Name Assigned By Controlling Agency
1/4"-28x1" black oxide alloy steel socket cap screw
Color
Black
Material
Steel
Material Specification
Astm a574 assn standard single material response
Surface Treatment
Black chemical finish
Thread Series Designator
Unrf
FSC
5305 Screws
NIIN
016212491
NSN
5305016212491

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
23806
Cage Code:
0Y3H3
Status:
A
MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov
  • Schedule B Number: 7318152000
  • NAICS: 332722
  • SITC: 69421
  • Description: Bolts and bolts and their nuts or washers exported in the same shipment
  • End Use (Code 12110):
    Iron and steel products, other

Q & A

Frequently asked questions for NSN 5305-01-621-2491
What are the manufacturers of nsn 5305016212491?
Does this nsn 5305016212491 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305016212491
An externally threaded fastener whose threaded portion is of one nominal diameter. the head has an internal socket or multiple spline for use with an inserted driver. a locking feature may be incorporated in the design of the head or threads. excludes items with bevel (conical) heads. see bolt, internal wrenching. excludes screw, shoulder; and screw, machine.
Does nsn 5305016212491 contain any precious metals?
No precious metal content.
Does nsn 5305016212491 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305016212491?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
16282
FIIG:
A003B0
App. Key:
SC
Cond. Code:
1
Status:
A

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  •   On Time Delivery
  •   Certificate of Conformance
  •   Quality Inspected Parts
  •   Quality Fast Service
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