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Externally Relieved Body Screw NSN 5305-00-979-8987

Item Description

An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercut for thread relief). It is no. 0 (0.060 in.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below no. 10 (0.190 in.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and 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. See also bolt, externally relieved body and bolt, internal wrenching.

NSN 5305-00-979-8987 NSN: 5305-00-979-8987

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Features and Characteristics

Thread Class
2a
Thread Direction
Right-hand
Thread Length
0.472 inches
Fastener Length
2.558 inches
Head Style
Dee chamfer
Head Diameter
Between 0.389 inches and 0.393 inches
Head Height
Between 0.189 inches and 0.205 inches
Distance From Centerline To Flat
Between 0.154 inches and 0.156 inches
First Diameter From Head
0.250 inches
Second Diameter From Head
Between 0.197 inches and 0.205 inches
Third Diameter From Head
0.250 inches
Fourth Diameter From Head
Between 0.186 inches and 0.194 inches
Distance From Largest Bearing Surface Of Head To End Of First Diameter
0.125 inches
Distance From Largest Bearing Surface Of Head To End Of Second Diameter
Between 0.943 inches and 0.959 inches
Distance From Largest Bearing Surface Of Head To End Of Third Diameter
Between 1.486 inches and 1.518 inches
Distance From Largest Bearing Surface Of Head To End Of Fourth Diameter
Between 2.148 inches and 2.196 inches
Internal Drive Style
Cross recess type 1
Thread Diameter
0.250 inches
Thready Qty Per Inch (tpi)
20
Externally Relieved Body Diameter Quantity
4
Part Name Assigned By Controlling Agency
Navy special project
Material
Steel comp 4340
Material Specification
Sae assn standard single material response
Thread Series Designator
Unc
FSC
5305 Screws
NIIN
009798987
NSN
5305009798987

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
A1-4826
Cage Code:
31949
Status:
A
MSDS:
Part Number:
394826
Cage Code:
31949
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 5305-00-979-8987
What are the manufacturers of nsn 5305009798987?
Does this nsn 5305009798987 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305009798987
An externally threaded fastener whose threaded portion is of one nominal diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a maximum diameter less than the minimum pitch diameter of the thread (excludes undercut for thread relief). it is no. 0 (0.060 in.) (1.5 mm) or larger, and is designed to be held or driven with either a wrench or inserted driver (excluding internal socket and multiple spline types) or both in sizes below no. 10 (0.190 in.) (5 mm) and larger sizes must have a head designed for any type inserted driver (excluding internal socket and 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. see also bolt, externally relieved body and bolt, internal wrenching.
Does nsn 5305009798987 contain any precious metals?
Precious metal content is unknown.
Does nsn 5305009798987 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305009798987?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
01852
FIIG:
A003B0
App. Key:
SE
Cond. Code:
1
Status:
A

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