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Close Tolerance Screw NSN 5305-00-121-8895

Item Description

A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. Items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.

NSN 5305-00-121-8895 NSN: 5305-00-121-8895

Features and Characteristics

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.282 inches and 0.333 inches
Fastener Length
Between 1.543 inches and 1.563 inches
Head Style
Flat countersunk
Head Diameter
Between 0.449 inches and 0.507 inches
Locking Feature
Detent ball grip
Grip Diameter
Between 0.2483 inches and 0.2492 inches
Shank Unthreaded Hole Diameter
0.076 inches first hole and 0.086 inches first hole
Internal Drive Style
High-torque
Thread Diameter
0.250 inches
Grip Length
Between 1.125 inches and 1.141 inches
Thready Qty Per Inch (tpi)
28
Hardness Rating
36.0 rockwell c and 41.0 rockwell c
Countersink Angle
100.0 degrees
Distance From Head Largest Bearing Surface To Shank Hole Center
1.443 inches first hole and 1.563 inches first hole
Surface Finish
63.0 microinches top of head
Material
Steel
Material Specification
Mil-b-83050 military specification single material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416 type 2 cl 2 federal specification single treatment response
Thread Series Designator
Unjf
FSC
5305 Screws
NIIN
001218895
NSN
5305001218895

Manufacturer Part Numbers

Part numbers registered to this national stock number.
Part Number
Cage
Status
MSDS
Part Number:
MS27577-4-18
Cage Code:
80205
Status:
A
MSDS:
Part Number:
106466-4-18
Cage Code:
80539
Status:
A
MSDS:
Part Number:
AS195-4-18
Cage Code:
84256
Status:
A
MSDS:
Part Number:
CA4520-4-18
Cage Code:
29372
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 5305-00-121-8895
What are the manufacturers of nsn 5305001218895?
Does this nsn 5305001218895 have a shelf life?
No. This NSN does not have an applicable shelf life.
What is the formal definition of nsn 5305001218895
A screw, machine or screw, cap, socket head whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 in.) (0.025 mm) or less of a specific diameter for items (1.000 in.) (25 mm) or less in diameter. items over (1.000 in.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 in.) (0.038 mm) or less. the nominal major diameter of the threads shall be at least one thousandth (0.001 in.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the screw thread standards, fed std h28 and/or other nationally recognized standards. the head is designed to be held or driven with an inserted driver. it is not designed for rotation by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads.
Does nsn 5305001218895 contain any precious metals?
No precious metal content.
Does nsn 5305001218895 contain any hazardous materials?
No MSDS. No hazardous material.
What is the ESD classification of nsn 5305001218895?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)
INC
FIIG
App. Key
Cond. Code
Status
INC:
29294
FIIG:
A003B0
App. Key:
SS
Cond. Code:
1
Status:
A

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