Socket Head Cap Screw NSN 5305-01-278-1991

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: 5305-01-278-1991

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Features and Characteristics

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.432 inches and 0.494 inches

Fastener Length

Between 0.678 inches and 0.698 inches

Head Style

Hexagon

Head Height

Between 0.105 inches and 0.120 inches

Width Between Flats

Between 0.305 inches and 0.314 inches

Internal Drive Style

Hexagon

Thread Diameter

0.190 inches

Width Across Flats

0.125 inches

Thready Qty Per Inch (tpi)

Special Features

Two slot cut out at 180 degrees, 0.608 in. Length, 0.044min in. And 0.054 max in. Width

Material

Steel comp 301 or steel comp 302 or steel comp 302b or steel comp 304 or steel comp 304l or steel comp 305 or steel comp 308 or steel comp 309 or steel comp 309s or steel comp 310 or steel comp 310s or steel comp 314 or steel comp 316 or steel comp 316l or steel comp 317 or steel comp 321 or steel comp 347 or steel comp 348 or steel comp 384 or steel comp 385

Material Specification

Qq-s-763 federal specification all material responses

Surface Treatment

Cadmium and chromate

Surface Treatment Specification

Qq-p-416, type 2 class 2 federal specification single treatment response

Thread Series Designator

Unf

FSC

5305 Screws

NIIN

012781991

NSN

5305012781991

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

CA21241C-10-3-11

Cage Code:

29372

Status:

MSDS:

Part Number:

C9747-3-3-11

Cage Code:

81755

Status:

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 5305-01-278-1991

What are the manufacturers of nsn 5305012781991?

Arconic Global Fasteners & Rings, (29372)
Lockheed Martin Corporation (81755)

Does this nsn 5305012781991 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 5305012781991
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 5305012781991 contain any precious metals?
No precious metal content.

Does nsn 5305012781991 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 5305012781991?
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:

Cond. Code:

Status:

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