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Machine Screw NSN 5305-00-685-2521

Item Description

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.

NSN 5305-00-685-2521 NSN: 5305-00-685-2521

Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.291 inches and 0.341 inches
Fastener Length
Between 0.551 inches and 0.581 inches
Head Style
Pan
Head Diameter
Between 0.473 inches and 0.492 inches
Head Height
Between 0.162 inches and 0.175 inches
Internal Drive Style
Cross recess type 1
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
28
Min. Tensile Strength (psi)
160000 pounds per square inch
Hardness Rating
Between 36.0 rockwell c and 40.0 rockwell c
Screw Material
Steel comp 4140 or steel comp e4340 or steel comp 8740
Screw Material Specification
Mil-s-5626 military specification 1st material response or mil-s-5000 military specification 2nd material response or mil-s-6049 military specification 3rd material response
Screw Surface Treatment
Cadmium and chromate
Screw Surface Treatment Specification
Qq-p-416 type 2 cl 2 federal specification single treatment response
Thread Series Designator
Unjf
Specification Data
80205-nas623 professional/industrial association standard
FSC
5305 Screws
NIIN
006852521
NSN
5305006852521

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
NAS623-4-4
Cage Code:
80205
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 5305-00-685-2521
What are the manufacturers of nsn 5305006852521?
Does this nsn 5305006852521 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305006852521
An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). no. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. a locking feature may be incorporated in the design of the head or threads. excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. see also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.
Does nsn 5305006852521 contain any precious metals?
Precious metal content is unknown.
Does nsn 5305006852521 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305006852521?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
06657
FIIG:
A500D0
App. Key:
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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