Model: FF-S-86 1/4-20U NC 3A-1/2 IN

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.400 inches and 0.500 inches

Fastener Length

0.500 inches

Head Style

Flat chamfer

Head Diameter

Between 0.365 inches and 0.375 inches

Head Height

Between 0.244 inches and 0.250 inches

Internal Drive Style

Hexagon

Thread Diameter

0.250 inches

Width Across Flats

0.188 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

80000 pounds per square inch

Minimum Yield Strength

40000 pounds per square inch

Material

Nickel alloy 400

Material Specification

Qq-n-281 cl a federal specification single material response

Thread Series Designator

Unc

Nondefinitive Specification/std Data

6 type

NSN

5305-01-318-5234

Part Number

FF-S-86 1/4-20U NC 3A-1/2 IN

Description

Screw,cap,socket Head

CAGE

D9182

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.

Part FF-S-86 1/4-20U NC 3A-1/2 IN NSN 5305-01-318-5234

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

16282

FIIG:

A003B0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

139820

UFC:

70220

LTL:

85.0

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7508900000
SITC: 69975
End Use: Finished metal shapes
NAICS: 332999
USDA: 1

Freight Class: Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire)