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Panel Screw Assembly NSN 5305-01-621-4257

Item Description

A headed, threaded fastening device over which may be assembled; (1) a stand-off; (2) a flanged bushing with washer(s) and/or a shouldered bushing without a flange, or it may have an internally threaded sleeve that is an integral part of the screw; a washer and an externally thread self-locking bushing that is driven by an inserted driver. Attached to panel by threaded bushing or by flaring end of stand-off, or bushing. Used in conjunction with a speed nut, nut plate, or driven into a threaded hole in the item that the panel is fastened to. May be spring loaded.

NSN 5305-01-621-4257 NSN: 5305-01-621-4257

Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Fastener Length
Between 1.23 inches and 1.27 inches
Head Style
Knurled no. 5
Head Diameter
0.531 inches
Head Height
0.530 inches
Internal Drive Style
Cross recess type ii
Material Accommodated Thickness
Between 0.032 inches and 0.093 inches
Thread Diameter
0.250 inches
Features Provided
Washer
Thready Qty Per Inch (tpi)
20
Part Name Assigned By Controlling Agency
Captive fastener, 1/4-20
Material
Steel comp 302 fastener
Material Specification
Astm-a493 assn standard single material response or ams5636 national std/spec single material response fastener
Surface Treatment
Passivate washer
Surface Treatment Specification
Qq-p-35 federal specification single treatment response washer
Thread Series Designator
Unf
FSC
5305 Screws
NIIN
016214257
NSN
5305016214257

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
FRB7500P-12C-B-5
Cage Code:
5R793
Status:
A
MSDS:
Part Number:
802027297039-1
Cage Code:
12255
Status:
A
MSDS:
Part Number:
S-0433
Cage Code:
17446
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 5305-01-621-4257
What are the manufacturers of nsn 5305016214257?
Does this nsn 5305016214257 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305016214257
A headed, threaded fastening device over which may be assembled; (1) a stand-off; (2) a flanged bushing with washer(s) and/or a shouldered bushing without a flange, or it may have an internally threaded sleeve that is an integral part of the screw; a washer and an externally thread self-locking bushing that is driven by an inserted driver. attached to panel by threaded bushing or by flaring end of stand-off, or bushing. used in conjunction with a speed nut, nut plate, or driven into a threaded hole in the item that the panel is fastened to. may be spring loaded.
Does nsn 5305016214257 contain any precious metals?
No precious metal content.
Does nsn 5305016214257 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305016214257?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
33044
FIIG:
A003B0
App. Key:
SU
Cond. Code:
1
Status:
A

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  •   Certificate of Conformance
  •   Quality Inspected Parts
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