Model: 91255A/90

Socket Head Cap Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.188 inches and 0.250 inches

Fastener Length

0.250 inches

Head Style

Button

Head Diameter

0.312 inches

Internal Drive Style

Hexagon

Thread Diameter

0.164 inches

Width Across Flats

0.094 inches

Thready Qty Per Inch (tpi)

Min. Tensile Strength (psi)

170000 pounds per square inch

Hardness Rating

36.0 rockwell c and 45.0 rockwell c

Part Name Assigned By Controlling Agency

Navy special project

Color

Black

Material

Steel

Material Specification

Sae grade 8 assn standard single material response

Surface Treatment

Oxide

Thread Series Designator

Unc

NSN

5305-01-346-9153

Part Number

91255A/90

Description

Screw,cap,socket Head

CAGE

39428

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 91255A/90 NSN 5305-01-346-9153

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:

096640

UFC:

50600

LTL:

70.0

LCL:

WCC:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7318152000
SITC: 69421
End Use: Iron and steel products, other
NAICS: 332722
USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment